Journal articles: 'Glasse'

1

Chistova, I. S. "IN MEMORY OF ANTONIA GLASSE." Vremennik Pushkinskoi Komissii 34 (2020): 283–87. http://dx.doi.org/10.31860/0236-2481-2020-34-283-287.

Full text

APA, Harvard, Vancouver, ISO, and other styles

2

Abbes, K., C. Mai, S. Etienne, J. Perez, and G. P. Johari. "Rubber state of ionic fluorozirconate glasse." Nature 326, no. 6112 (April 1987): 479–80. http://dx.doi.org/10.1038/326479a0.

Full text

APA, Harvard, Vancouver, ISO, and other styles

3

Zahid, Saba, Asma Tufail Shah, Arshad Jamal, Aqif Anwar Chaudhry, Abdul Samad Khan, Ather Farooq Khan, Nawshad Muhammad, and Ihtesham ur Rehman. "Biological behavior of bioactive glasses and their composites." RSC Advances 6, no. 74 (2016): 70197–214. http://dx.doi.org/10.1039/c6ra07819b.

Full text

APA, Harvard, Vancouver, ISO, and other styles

4

Pivetti, Kyle. "The Optics of Prediction in The Faerie Queene: Merlin’s Reflecting Telescope." Explorations in Renaissance Culture 45, no. 1 (April 25, 2019): 7–28. http://dx.doi.org/10.1163/23526963-04501002.

Full text

Abstract:

A mirror or a crystal ball? That interpretive crux arises at the heart of Book iii of Spenser’s The Faerie Queene – when Britomart discovers Merlin’s “glassy globe” and first sees Arthegall in its surface. The “looking-glasse,” that is, not only reflects Britomart but also tells the future. This essay revisits the problem of Merlin’s glass by locating it in the context of rapidly developing sixteenth-century optics, and one invention in particular: the reflecting telescope. By 1590, a range of thinkers from John Dee to Leonard Digges discovered in the reflective properties of mirrors innovative ways to understand human sight, cognition, and prediction. And it is Digges that proposes a reflecting telescope, a device that Merlin employs in Book iii. These scientific advances, in turn, inform Spenser’s references to vision and reflection throughout the poem, granting his allegory the ability both to distort sight and counter-intuitively to produce the future. Indeed, The Faerie Queene uses misrepresentation to protect its queen and to protect budding projects of nationalism. To see, for Spenser, is to change “the world it self” and to bring about its British futures.

APA, Harvard, Vancouver, ISO, and other styles

5

Rex, Richard. "Redating Henry VIII's A Glasse of the Truthe." Library 4, no. 1 (March 1, 2003): 16–27. http://dx.doi.org/10.1093/library/4.1.16.

Full text

APA, Harvard, Vancouver, ISO, and other styles

6

Reid, L. A. "Gower's Slothful Aeneas in Batman's Christall Glasse of Christian Reformation." Notes and Queries 61, no. 3 (August 1, 2014): 349–53. http://dx.doi.org/10.1093/notesj/gju101.

Full text

APA, Harvard, Vancouver, ISO, and other styles

7

WALKER, JULIA M. "THE VISUAL PARADIGM OF ‘THE GOOD-MORROW’: DONNE'S COSMOGRAPHICAL GLASSE." Review of English Studies XXXVII, no. 145 (1986): 61–65. http://dx.doi.org/10.1093/res/xxxvii.145.61.

Full text

APA, Harvard, Vancouver, ISO, and other styles

8

Man, Da Hu, and Qiang Li. "Isothermal Crystallization Behavior of Cu₄₂Zr₄₂Al₈Ag₈ BMG Investigated with Electrical Resistance Measurement." Advanced Materials Research 1095 (March 2015): 155–59. http://dx.doi.org/10.4028/www.scientific.net/amr.1095.155.

Full text

Abstract:

The isothermal crystallization behavior of the Cu42Zr42Al8Ag8 bulk metallic glasse (BMG) was studied by the electrical resistance method. The increasing local activation energy means that the crystallization of the Cu42Zr42Al8Ag8 BMG becomes more and more difficult during the isothermal process. In the stage that the crystallized volume fraction falls into the range of 25–85%, the crystallization of the Cu42Zr42Al8Ag8 BMG is diffusion-controlled growth with a decreasing nucleation rate.

APA, Harvard, Vancouver, ISO, and other styles

9

Wortham, Simon. "The Glasse of majesty: Reflections on new historicism and cultural materialism." Angelaki 2, no. 2 (January 1997): 47–57. http://dx.doi.org/10.1080/09697259708571931.

Full text

APA, Harvard, Vancouver, ISO, and other styles

10

Hofmann, M. W. "Review: The Concise Encyclopaedia of Islam * Cyril Glasse: The Concise Encyclopaedia of Islam." Journal of Islamic Studies 13, no. 2 (May 1, 2002): 184–87. http://dx.doi.org/10.1093/jis/13.2.184.

Full text

APA, Harvard, Vancouver, ISO, and other styles

11

De Aza, P. N., A. H. De Aza, P. Pena, and S. De Aza. "Vidrios y Vitrocerámicos Bioactivos." Boletín de la Sociedad Española de Cerámica y Vidrio 46, no. 2 (April 30, 2007): 45–55. http://dx.doi.org/10.3989/cyv.2007.v46.i2.249.

Full text

APA, Harvard, Vancouver, ISO, and other styles

12

Hodder, Alan D. "In the Glasse of God's Word: Hooker's Pulpit Rhetoric and the Theater of Conversion." New England Quarterly 66, no. 1 (March 1993): 67. http://dx.doi.org/10.2307/366480.

Full text

APA, Harvard, Vancouver, ISO, and other styles

13

Lakshmana Rao, J., B. Sreedhar, Y. C. Ratnakar, and S. V. J. Lakshman. "Electron spin resonance and optical absorption spectra of mn2+ ions in nap2so4-znso4 glasse." Journal of Non-Crystalline Solids 92, no. 1 (June 1987): 175–79. http://dx.doi.org/10.1016/s0022-3093(87)80367-8.

Full text

APA, Harvard, Vancouver, ISO, and other styles

14

Monnickendam, Andrew. "Ann Cook versus Hannah Glasse: Gender, Professionalism and Readership in the Eighteenth‐Century Cookbook." Journal for Eighteenth-Century Studies 42, no. 2 (December 4, 2018): 175–91. http://dx.doi.org/10.1111/1754-0208.12606.

Full text

APA, Harvard, Vancouver, ISO, and other styles

15

da Silva, Antônio Carlos, S. C. Santos, and Sonia Regina Homem de Mello-Castanho. "Transition Metals in Glass Formation." Materials Science Forum 727-728 (August 2012): 1496–501. http://dx.doi.org/10.4028/www.scientific.net/msf.727-728.1496.

Full text

Abstract:

The structure of silicate glasses gets its charge stability through SiO2, R2O3, R2+and R+groups arrangement. In these glassy structures, transition metals are usually used as dopants in small amounts. However, in soda-lime glass systems, transition metals can take part in the glassy network in larger quantities as secundary former or modifier, insted R2+groups, if the charge balance conditions are made favorable by R2O3groups additions. This paper studies transition metals (Cr, Ni, Fe, Cu, Zn, Pb, Ru) soda-lime-borosilicate glass network incorporation. This process was applied for many kinds of toxic metals containing vitrification waste. The glasses were obtaind by melt at temperature of 1300°C, and characterized by FT-IR and XRD techinics. The chemical stability was evaluated by hydrolytic attack test. The glasses showed a high chemistry and environmental stability like the soda-lime glass.Keywords: glass structure, electroplating waste, e-waste, nanowaste.

APA, Harvard, Vancouver, ISO, and other styles

16

Barbieri, L., A. Corradi, and I. Lancellotti. "Residuos para la producción de vidrios y vitroceramicos." Materiales de Construcción 51, no. 263-264 (December 30, 2001): 197–208. http://dx.doi.org/10.3989/mc.2001.v51.i263-264.364.

Full text

APA, Harvard, Vancouver, ISO, and other styles

17

Costa, A. D. "John Fewterer's Myrrour or Glasse of Christes Passion and Ulrich Pinder's Speculum Passionis Domini Nostri." Notes and Queries 56, no. 1 (February 10, 2009): 27–29. http://dx.doi.org/10.1093/notesj/gjn222.

Full text

APA, Harvard, Vancouver, ISO, and other styles

18

Margha, Fatma, and Amr Abdelghany. "Bone bonding ability of some borate bio-glasses and their corresponding glass-ceramic derivatives." Processing and Application of Ceramics 6, no. 4 (2012): 183–92. http://dx.doi.org/10.2298/pac1204183m.

Full text

Abstract:

Ternary borate glasses from the system Na2O?CaO?B2O3 together with soda-lime-borate samples containing 5 wt.% of MgO, Al2O3, SiO2 or P2O5 were prepared. The obtained glasses were converted to their glass-ceramic derivatives by controlled heat treatment. X-ray diffraction was employed to investigate the separated crys?talline phases in glass-ceramics after heat treatment of the glassy samples. The glasses and corresponding glass-ceramics after immersion in water or diluted phosphate solution for extended times were characterized by the grain method (adopted by several authors and recommended by ASTM) and Fourier-transform infrared spectra to justify the formation of hydroxyapatite as an indication of the bone bonding ability. The influence of glass composition on bioactivity potential was discussed too.

APA, Harvard, Vancouver, ISO, and other styles

19

BAIRAGI, SUKHDEV, and GHIZAL F. ANSAR. "A Review on Physical and Optical Properties of Zinc Tellurite Glasses Co-doped with different rare earth ions." Journal of Ultra Scientist of Physical Sciences Section B 33, no. 6 (December 20, 2021): 48–56. http://dx.doi.org/10.22147/jusps-b/330601.

Full text

Abstract:

In this work we review the effect of physical and optical properties with different ion zinc contents of tellurite base glass. The physical properties of the glasses were evaluated and the change in density, molar volume and ionic packing density in these glasses indicates the effect of ZnO different content show on the glasses structure. The study of optical properties such as the optical band gap and refractive index of zinc tellurite glass were studied. Zinc Tellurite glasses doped with Er3+ ions were synthesized by varies researcher. The glasses were characterized by X- ray diffraction, optical absorption and photoluminescence spectra. The glassy nature of zinc Tellurite host glass has been confirmed through XRD measurements. The glasses doped or co-doped with rare-earth ions have generated much interest due to the possibility of several promising applications such as optical data storage, visible laser, fibre amplifier, optical communication and sensor devices

APA, Harvard, Vancouver, ISO, and other styles

20

Sharma, A., and N. Mehta. "Observation of Dielectric Peaks in Glassy Se₇₀Te₂₀Sn₁₀ Alloy." Defect and Diffusion Forum 329 (July 2012): 165–75. http://dx.doi.org/10.4028/www.scientific.net/ddf.329.165.

Full text

Abstract:

The Temperature and Frequency Dependences of the Dielectric Constants () and Dielectric Loss (") Were Studied in Glassy Se70Te20Sn10Alloy in the Audio-Frequency Range below the Glass Transition Region. the Results Indicated that Dielectric Dispersion Occurred in Glassy Se70Te20Sn10Alloy. Well-Defined Dielectric Peaks Were Obtained in Glassy Se70Te20Sn10Alloy; these Are Rarely Observed in Chalcogenide Glasses. such Loss Peaks Were Not Observed in the Glassy Se80-xTe20SnxSystem in the past for Sn Concentrations of x ≤ 8. A Detailed Analysis of the Data Showed that the Results Could Be Explained in Terms of Dipolar Relaxation, with a Distribution of Relaxation Times, this Is Quite Expected in the Case of Chalcogenide Glasses.

APA, Harvard, Vancouver, ISO, and other styles

21

Pan, Qun, Bin Zhu, Xiao Huang, and Lin Liu. "Properties of Alkli-Activated Slag Cement Compounded with Soluble Glasses with a High Silicate Modulus." Advanced Materials Research 712-715 (June 2013): 905–8. http://dx.doi.org/10.4028/www.scientific.net/amr.712-715.905.

Full text

Abstract:

Properties of alkali-activated slag cements compounded with soluble glasse with a high silicate modulus Ms=2.6 were detailedly studied in this paper, including compressive strength and flexure strength characterictics at the ages of 3,7,28 days and flow values of fresh cement mixtures on a jolting table. As a result, with the compressive strength at the age of 28 days of 95.6-107.8 MPa has been developed, and the flow values and strength characteristics of alkali-activated slag cement mortars increased with increase in a water to cement (alkaline activator solution to slag) ratio, and the flow value (determined on the cement mortar mixtures) would reach 145 mm. Moreover, the development speed of strength characteristics of mortar specimens would be affected negatively by increasing of water demand (requirement).

APA, Harvard, Vancouver, ISO, and other styles

22

Pietrzak, Tomasz K., Marek Wasiucionek, and Jerzy E. Garbarczyk. "Towards Higher Electric Conductivity and Wider Phase Stability Range via Nanostructured Glass-Ceramics Processing." Nanomaterials 11, no. 5 (May 17, 2021): 1321. http://dx.doi.org/10.3390/nano11051321.

Full text

Abstract:

This review article presents recent studies on nanostructured glass-ceramic materials with substantially improved electrical (ionic or electronic) conductivity or with an extended temperature stability range of highly conducting high-temperature crystalline phases. Such materials were synthesized by the thermal nanocrystallization of selected electrically conducting oxide glasses. Various nanostructured systems have been described, including glass-ceramics based on ion conductive glasses (silver iodate and bismuth oxide ones) and electronic conductive glasses (vanadate-phosphate and olivine-like ones). Most systems under consideration have been studied with the practical aim of using them as electrode or solid electrolyte materials for rechargeable Li-ion, Na-ion, all-solid batteries, or solid oxide fuel cells. It has been shown that the conductivity enhancement of glass-ceramics is closely correlated with their dual microstructure, consisting of nanocrystallites (5–100 nm) confined in the glassy matrix. The disordered interfacial regions in those materials form “easy conduction” paths. It has also been shown that the glassy matrices may be a suitable environment for phases, which in bulk form are stable at high temperatures, and may exist when confined in nanograins embedded in the glassy matrix even at room temperature. Many complementary experimental techniques probing the electrical conductivity, long- and short-range structure, microstructure at the nanometer scale, or thermal transitions have been used to characterize the glass-ceramic systems under consideration. Their results have helped to explain the correlations between the microstructure and the properties of these systems.

APA, Harvard, Vancouver, ISO, and other styles

23

Mehrer, Helmut. "Diffusion in Glassy Metals." Diffusion Foundations 1 (April 2014): 125–51. http://dx.doi.org/10.4028/www.scientific.net/df.1.125.

Full text

Abstract:

Firstly, this paper reminds the reader of some basic facts about the glassy state, then of the various ways to produce amorphous metals with particular emphasis on the route of vitrification from the melt. Vitrification of an undercooled melt is the most important route from the viewpoint of the application of metallic glasses. We compare diffusion in some metallic glasses with related crystalline metals. Glassy metals, also called metallic glasses, comprise conventional [1] and bulk metallic glasses [2,3]. We remind the reader of the major experimental techniques for diffusion studies in metallic glasses. The paper then reviews our current understanding of diffusion in glassy metals (see also [4,5,6]), including conventional as well as bulk metallic glasses and undercooled melts. We cover the temperature dependence of diffusion in metallic glasses and discuss the spectrum of activation parameters of glassy metals and its difference to the corresponding one of crystalline metals. We mention the pressure dependence and the isotope effect and we discuss tracer diffusion and viscosity diffusion for a bulk metallic glass and its undercooled melt. Finally we mention computer simulations of atomic jump processes. The diffusion mechanism in metallic glasses differs from that in crystalline metals and involves thermally activated, highly collective (chain-like or caterpillar-like) diffusion jumps. Finally, we mention diffusion along shearbands in a plastically deformed glassy metal.

APA, Harvard, Vancouver, ISO, and other styles

24

Wheaton, Jacob, and Steve Martin. "Electrochemical Characterization of a Drawn Thin-Film Mixed Oxy-Sulfide Glassy Electrolyte Material for Solid-State Battery Applications." ECS Meeting Abstracts MA2022-02, no. 4 (October 9, 2022): 489. http://dx.doi.org/10.1149/ma2022-024489mtgabs.

Full text

Abstract:

Solid-state batteries are a promising avenue for next-generation lithium-ion batteries due to their enabling of the lithium metal anode, while simultaneously removing the flammable organic electrolyte. Glassy materials are particularly interesting as solid-state electrolytes due to their intrinsic lack of grain boundaries, their low temperature forming capabilities, and their highly tunable chemistries. Much work has been done to study the electrochemical properties of glasses in the Li2S – SiS2 – LixMOy phase space, and several compositions have shown high ionic conductivities (~ 10-3 S/cm), large electrochemical stability windows (0-5 V vs. Li/Li+), and good glass forming ability. These glasses, however, have not been well studied at thicknesses that are viable for commercialization of solid electrolytes (< 100 μm). Utilizing a glass working method known as the redraw process, a rectangular preform of glass can be reheated and drawn from ~ 5 mm in thickness to thin films of less than 100 μm. The electrochemical behavior of thin-film glasses in the Li2S – SiS2 – LiPO3 phase space created through the glass redraw process are studied utilizing electrochemical impedance spectroscopy, cyclic voltammetry, and galvanostatic symmetric cell cycling. These results show that thin-film glassy solid electrolytes made through the glass redraw method are a viable new research direction for generation of highly conducting thin-film solid-state electrolytes.

APA, Harvard, Vancouver, ISO, and other styles

25

Lu, Tong, Song Ling Liu, Yong Hao Sun, Wei-Hua Wang, and Ming-Xiang Pan. "A Free-Volume Model for Thermal Expansion of Metallic Glass." Chinese Physics Letters 39, no. 3 (March 1, 2022): 036401. http://dx.doi.org/10.1088/0256-307x/39/3/036401.

Full text

Abstract:

Many mechanical, thermal and transport behaviors of polymers and metallic glasses are interpreted by the free-volume model, whereas their applications on thermal expansion behaviors of glasses is rarely seen. Metallic glass has a range of glassy states depending on cooling rate, making their coefficients of thermal expansion vary with the glassy states. Anharmonicity in the interatomic potential is often used to explain different coefficients of thermal expansion in crystalline metals or in different metallic-glass compositions. However, it is unclear how to quantify the change of anharmonicity in the various states of metallic glass of the same composition and to connect it with coefficient of thermal expansion. In the present work, isothermal annealing is applied, and the dimensional changes are measured for La62Al14Cu11.7Ag2.3Ni5Co5 and Zr52.5Cu17.9Ni14.6Al10Ti5 metallic glasses, from which changes in density and the coefficients of thermal expansion of the specimens are both recorded. The coefficients of thermal expansion linearly decrease with densification reflecting the role of free volume in thermal expansion. Free volume is found to have not only volume but also entity with an effective coefficient of thermal expansion similar to that of gases. Therefore, the local regions containing free volume inside the metallic glass are gas-like instead of liquid-like in terms of thermal expansion behaviors.

APA, Harvard, Vancouver, ISO, and other styles

26

Jin, H. J., and K. Lu. "An indirect approach to measure glass transition temperature in metallic glasses." International Journal of Materials Research 97, no. 4 (April 1, 2006): 388–94. http://dx.doi.org/10.1515/ijmr-2006-0065.

Full text

Abstract:

Abstract Glass transition behavior of metallic glasses under some extraordinary conditions (such as under high pressures) remains unexplored. Conventional measurements of glass transition temperature, T g, are very difficult to perform under these extraordinary circumstances. In the present paper, we introduce an indirect approach to characterize glass transition, using enthalpy recovery experiments. With annealing deeply relaxed glassy samples and subsequent DSC measurements, a variation of enthalpy change upon heating with annealing temperature can be obtained. The variation of enthalpy change, a signature of glass transition, was found to correlate well with the directly measured DSC curves for the glass transition. This unique method was successfully applied in determining T g of several metallic glasses under hydrostatic high pressures and compression stresses.

APA, Harvard, Vancouver, ISO, and other styles

27

Möncke, Doris, Brian Topper, and Alexis G. Clare. "Glass as a State of Matter—The “newer” Glass Families from Organic, Metallic, Ionic to Non-silicate Oxide and Non-oxide Glasses." Reviews in Mineralogy and Geochemistry 87, no. 1 (May 1, 2022): 1039–88. http://dx.doi.org/10.2138/rmg.2022.87.23.

Full text

Abstract:

OVERVIEW In theory, any molten material can form a glass when quenched fast enough. Most natural glasses are based on silicates and for thousands of years only alkali/alkaline earth silicate and lead-silicate glasses were prepared by humankind. After exploratory glass experiments by Lomonosov (18th ct) and Harcourt (19th ct), who introduced 20 more elements into glasses, it was Otto Schott who, in the years 1879–1881, melted his way through the periodic table of the elements so that Ernst Abbe could study all types of borate and phosphate glasses for their optical properties. This research also led to the development of the laboratory ware, low alkali borosilicate glasses. Today, not only can the glass former silicate be replaced, partially or fully, by other glass formers such as oxides of boron, phosphorous, tellurium or antimony, but also the oxygen anions can be substituted by fluorine or nitrogen. Chalcogens, the heavier ions in the group of oxygen in the periodic table (S, Se, Te), on their own or when paired with arsenic or germanium, can function as glass formers. Sulfate, nitrate, tungstate and acetate glasses lack the conventional anion and cation classification, as do metallic or organic glasses. The latter can occur naturally—amber predates anthropogenic glass manufacture by more than 200 million years. In this chapter, we are going to provide an overview of the different glass families, how the structure and properties of these different glass types differ from silicate glasses but also what similarities are dictated by the glassy state. Applications and technological aspects are discussed briefly for each glass family.

APA, Harvard, Vancouver, ISO, and other styles

28

Wei, Wen-Hou. "Effects of chemical composition and mean coordination number on glass transitions in Ge–Sb–Se glasses." Modern Physics Letters B 31, no. 36 (December 13, 2017): 1750342. http://dx.doi.org/10.1142/s0217984917503420.

Full text

Abstract:

Glass transitions in the Ge–Sb–Se glasses were investigated by means of differential scanning calorimetry (DSC) under non-isothermal conditions. The glass transition temperature [Formula: see text], activation energy of glass transition [Formula: see text], and fragility index as functions of the mean coordination number (MCN) and atomic percent of Ge were examined. The maximum value of [Formula: see text] in each group of the glasses occurred at the chemically stoichiometric composition, suggesting a glass transition threshold. The [Formula: see text] and fragility index were calculated from the heating rate dependence of [Formula: see text]. Both [Formula: see text] and fragility index show the minima at MCN = 2.4 which can be attributed to the structural phase transition of a covalently glassy network at MCN = 2.4. The analysis of the experimental results suggests that both the chemical composition and MCN have significant effects on the glass transitions in Ge–Sb–Se glasses.

APA, Harvard, Vancouver, ISO, and other styles

29

Wójcik, N. A., S. Ali, A. Mielewczyk-Gryń, and B. Jonson. "Two-step synthesis of niobium doped Na–Ca–(Mg)–P–Si–O glasses." Journal of Materials Science 56, no. 12 (January 25, 2021): 7613–25. http://dx.doi.org/10.1007/s10853-021-05781-w.

Full text

Abstract:

AbstractNiobium doped biosolubility glasses in the Na–Ca–(Mg)–P–Si–O system were prepared by using an untypical two-step synthesis route. The parent glass was melted in air atmosphere at 1350 °C followed by re-melting the glass in Nb crucible with the addition of metallic Mg/Ca powder in the nitrogen atmosphere. The second melting step was carried out at 1450–1650 °C, using an induction furnace. The topography and structure of the obtained glasses were characterized by confocal microscopy, X-ray powder diffraction and infrared spectroscopic techniques. The chemical compositions were examined by energy-dispersive X-ray spectroscopy (EDS). The glasses were found to be of grayish color, X-ray amorphous and having network connectivity between ~ 2.5 and 2.7. The network connectivity of re-melted glasses was lower than the one of the parent glass. The glass structure consists of a highly disrupted silicate network of predominantly Q2 groups as well as isolated orthophosphate tetrahedra. The parent glass contains nanocrystallites consisted of apatitic PO43− groups. The re-melted glasses contain non-apatitic or amorphous calcium phosphates. The obtained glass transition temperatures range from 530 to 568 °C and exhibit higher values for glassed doped with Ca metal. These glasses have improved thermal stability as compared to reference bioglasses. The biosolubility test in phosphate buffered saline solution (PBS) confirms that the glasses have biosolubility properties and HAp formation on the surfaces was observed.

APA, Harvard, Vancouver, ISO, and other styles

30

Priya, D., and S. Thirumaram. "Acoustical parameters of sodium borate metallic glass - Na2CO3-B2O3-Na2O." Journal of Ovonic Research 17, no. 2 (March 2021): 125–36. http://dx.doi.org/10.15251/jor.2021.172.125.

Full text

Abstract:

In recent decades, one of the very popular and kind of advanced materials is Metallic glasses. Metallic glass materials can easily versatile for their manufacturability with plastics because of their complex shapes. Presently, Glassy alloys pivotan extraordinaryexploration in the worldwide community of metals.In this paper we have presented about Sodium Borate Glass-(Na3bo3) nature, glasses in the system Na3bo3, by melt quenching technique has been prepared. The structural investigation has been carried out by X-Ray Diffraction studies. Debye temperature and Elastic properties have been analyzedby utilizing measurements of sound velocity. The purpose of Na2O in the B2O3is to change the host structure by changing the borate network structural units from BO3 to BO4. Sodium diborate is a type of borate glass. Borate glass of this typeattractsmany researchers attentionbecause of their improved optical and electrical properties. Infra Red spectroscopy is one of theviabletools for the local arrangements structure resolution in glasses. The UVvisible optical analysisis used to study about the optical spectra. These results are utilized to find the refractive index of glasses and optical band gap.

APA, Harvard, Vancouver, ISO, and other styles

31

Yu, Hai Bin, Wei Hua Wang, Hai Yang Bai, and Konrad Samwer. "The β-relaxation in metallic glasses." National Science Review 1, no. 3 (September 1, 2014): 429–61. http://dx.doi.org/10.1093/nsr/nwu018.

Full text

Abstract:

Abstract Focusing on metallic glasses as model systems, we review the features and mechanisms of the β-relaxations, which are intrinsic and universal to supercooled liquids and glasses, and demonstrate their importance in understanding many crucial unresolved issues in glassy physics and materials science, including glass transition phenomena, mechanical properties, shear-banding dynamics and deformation mechanisms, diffusion and the breakdown of the Stokes–Einstein relation as well as crystallization and stability of glasses. We illustrate that it is an attractive prospect to incorporate these insights into the design of new glassy materials with extraordinary properties. We also outline important questions regarding the nature of β-relaxations and highlight some emerging research directions in this still-evolving field.

APA, Harvard, Vancouver, ISO, and other styles

32

Marzouk, Mohamed, and Batal El. "In vitro bioactivity of soda lime borate glasses with substituted SrO in sodium phosphate solution." Processing and Application of Ceramics 8, no. 3 (2014): 167–77. http://dx.doi.org/10.2298/pac1403167m.

Full text

Abstract:

Borate glasses with the basic composition 0.6B2O3?0.2Na2O?0.2CaO and SrO progressively substituting CaO were prepared and characterized for their bone-bonding ability. The obtained glasses were thermally treated and converted to their glass-ceramic derivatives. In this study, FTIR spectral analyses were done for the prepared glasses and glass-ceramics before and after immersion in a sodium phosphate solution for extended times. The appearance of two IR bands within the spectral range 550-680 cm-1 after immersion confirms the formation of hydroxyapatite. X-ray diffraction studies and scanning electron microscope analysis supported the obtained infrared spectroscopy results. The solubility test (measurements of the weight loss in aqueous sodium phosphate solution) was conducted for measuring the dissolution of both glassy and crystalline derivatives to find out the role of SrO. The corrosion behaviour of the glasses and glass-ceramics indicate the increase of weight loss with the increase of SrO content. Different suggested proposals were introduced to explain this abnormal behaviour.

APA, Harvard, Vancouver, ISO, and other styles

33

Richard Hillman. "Measure for Measure and the (Anti-)Theatricality of Gascoigne's The Glasse of Government." Comparative Drama 42, no. 4 (2008): 391–408. http://dx.doi.org/10.1353/cdr.0.0028.

Full text

APA, Harvard, Vancouver, ISO, and other styles

34

Renard, John. "The Concise Encyclopedia of Islam. By Cyril Glasse. San Francisco: Harper & Row, 1989. 472 pages. $59.95." Horizons 17, no. 1 (1990): 185–86. http://dx.doi.org/10.1017/s0360966900020120.

Full text

APA, Harvard, Vancouver, ISO, and other styles

35

Gautam, C. R., Devendra Kumar, Om Parkash, and O. P. Thakur. "Dielectric Properties of La2O3 Doped Composite (PbxSr1−x)TiO3 Borosilicate Glass Ceramic." Journal of Ceramics 2013 (December 5, 2013): 1–9. http://dx.doi.org/10.1155/2013/879758.

Full text

Abstract:

Ferroelectric (PbxSr1−x)TiO3 (PST) perovskite phase has been crystallized in borosilicate glassy matrix with a suitable choice of composition and heat treatment schedule. La2O3 is a donor dopant for PST and can make it semiconducting. Dispersion of semiconducting perovskite phase in insulating glassy matrix in glass-ceramic samples may lead to the formation of space charge polarization around crystal-glass interface, leading to a high value of effective dielectric constant, εr. Therefore, with the aim of the developing glass ceramics with high dielectric constant, glasses in the system 64[(PbxSr1−x)O·TiO2]-25[2SiO2·B2O3]-5[K2O]-5[BaO]-1[La2O3] have been prepared (0.5≤x≤1). It is found that the addition of La2O3 strongly affected the crystallization and dielectric behavior of glass-ceramic with PST perovskite phase. All glass ceramic samples show a diffuse broad Curie peak in their εr versus T plots. Curie peak temperature, Tc, depends on compositions of the glass-ceramic samples as well as frequency of measurements.

APA, Harvard, Vancouver, ISO, and other styles

36

Dong Guoping, 董国平, 万天择 Wan Tianze, 吴敏波 Wu Minbo, 潘绮雯 Pan Qiwen, 邱建荣 Qiu Jianrong, and 杨中民 Yang Zhongmin. "玻璃基因工程在激光玻璃等光功能玻璃领域的研究进展." Laser & Optoelectronics Progress 59, no. 15 (2022): 1516002. http://dx.doi.org/10.3788/lop202259.1516002.

Full text

APA, Harvard, Vancouver, ISO, and other styles

37

Gautam, C. R., Abhishek Madheshiya, and R. K. Dwivedi. "Synthesis, Crystallization, and Dielectric Behaviour of Lead Bismuth Titanate Borosilicate Glasses with Addition of 1% La2O3." Indian Journal of Materials Science 2015 (July 15, 2015): 1–10. http://dx.doi.org/10.1155/2015/498254.

Full text

Abstract:

Lead bismuth titanate borosilicate glasses were prepared in the glass system 65[(PbxBi1-x)·TiO3]-34[2SiO2·B2O3]-1La2O3 (0.0≤x≤1.0) doped with one mole percent of La2O3 via conventional melt quench method. The amorphous nature of glass samples in this glass system is confirmed by using X-ray diffraction (XRD) study. Differential thermal analysis (DTA) has been employed to determine the glass transition temperature, Tg, as well as crystallization temperature, Tc. DTA measurements were recorded in temperature range from 30 to 1200°C. The prepared glasses were crystallized by regulated controlled heat treatment process on the basis of their DTA results. These samples are carried out for XRD measurements in the 2θ range from 20 to 80° to study the crystallization behaviour and phase formation of the glass ceramic samples. The scanning electron microscopy (SEM) of these glass ceramic samples has been carried out to explore the morphology through nucleation and growth of the crystallites in the glassy matrix. The values of dielectric constant as well as dielectric loss were increased with increasing the temperature within the frequency range from 20 Hz to 100 Hz. The addition of 1 mol% of La2O3 to the lead bismuth titanate glasses enhances the crystallization and acts as donor dopant for this glass system.

APA, Harvard, Vancouver, ISO, and other styles

38

Gautam, C. R., Devendra Kumar, and Om Parkash. "Crystallization Behavior and Microstructural Analysis of Lead-Rich () Glass Ceramics Containing 1 mole." Advances in Materials Science and Engineering 2011 (2011): 1–11. http://dx.doi.org/10.1155/2011/402376.

Full text

Abstract:

Solid solution of perovskite Pb,SrTiO3in Pb-rich composition can be crystallized in borosilicate glassy matrix. The addition of rare earth and transition metal oxides is known to influence the crystallization behavior and surface morphology of perovskite crystallites in glassy matrix. In the present paper, the glasses in the lead-rich system 64[(PbxSr1-x)·TiO3]-25[2SiO2·B2O3]-5[K2O]-5[BaO] () with the addition of 1 mol % La2O3were prepared to study its effect on their crystallization behavior. Differential thermal analysis (DTA) patterns show one or more exothermic crystallization sharp peaks, which shift towards higher temperature with increasing concentration of SrO. The glasses were subjected to various heat-treatment schedules for crystallization. X-ray diffraction analysis of these glass ceramic samples shows that major crystalline phase of the entire glass ceramic sample with was found to have tetragonal structure similar to PbTiO3ceramic, and addition of La2O3enhances the crystallization of the perovskite phase and retards the crystallization of minor phases.

APA, Harvard, Vancouver, ISO, and other styles

39

Chamon, Claudio, Leticia F. Cugliandolo, Gabriel Fabricius, José Luis Iguain, and Eric R. Weeks. "From particles to spins: Eulerian formulation of supercooled liquids and glasses." Proceedings of the National Academy of Sciences 105, no. 40 (October 1, 2008): 15263–68. http://dx.doi.org/10.1073/pnas.0802724105.

Full text

Abstract:

The dynamics of supercooled liquid and glassy systems are usually studied within the Lagrangian representation, in which the positions and velocities of distinguishable interacting particles are followed. Within this representation, however, it is difficult to define measures of spatial heterogeneities in the dynamics, as particles move in and out of any one given region within long enough times. It is also nontransparent how to make connections between the structural glass and the spin glass problems within the Lagrangian formulation. We propose an Eulerian formulation of supercooled liquids and glasses that allows for a simple connection between particle and spin systems, and that permits the study of dynamical heterogeneities within a fixed frame of reference similar to the one used for spin glasses. We apply this framework to the study of the dynamics of colloidal particle suspensions for packing fractions corresponding to the supercooled and glassy regimes, which are probed via confocal microscopy.

APA, Harvard, Vancouver, ISO, and other styles

40

Silva, L. M. S. e., R. S. Magalhães, W. C. Macedo, G. T. A. Santos, A. E. S. Albas, and S. R. Teixeira. "Utilization of discarded foundry sand (DFS) and inorganic waste from cellulose and paper industry for the manufacture of glass-ceramic materials." Cerâmica 66, no. 380 (December 2020): 413–20. http://dx.doi.org/10.1590/0366-69132020663802899.

Full text

Abstract:

Abstract Recycling has been pointed out as an alternative to the disposal of waste materials in industrial landfills. In the present study, the transformation of residues (discarded foundry sand - DFS, grits, and lime mud) in glass-ceramic materials is shown. The glasses were obtained by the melting/cooling method. The precursor materials, glasses, and glass-ceramics were characterized by X-ray diffraction (XRD), X-ray fluorescence (XRF), and differential scanning calorimetry/thermal gravimetric analysis (DSC/TGA). The glassy materials were milled, pelleted, and thermally treated at the crystallization temperatures given by DSC data to obtain the glass-ceramics (885, 961, and 1090 ºC). The main formed phases were cristobalite, α-wollastonite (parawollastonite), and β-wollastonite (pseudowollastonite). The glass-ceramics showed very low water absorption and apparent porosity (0.26 to 0.88 wt% and 0.66 to 1.77 vol%, respectively). The results confirmed that the studied residues can be used as raw materials for the manufacture of vitreous and glass-ceramic materials.

APA, Harvard, Vancouver, ISO, and other styles

41

Wang, Qiang, Ding Ding, and Lei Xia. "Formability and Magnetic Properties of the Binary Nd-Co Amorphous Alloys." Metals 11, no. 11 (October 29, 2021): 1730. http://dx.doi.org/10.3390/met11111730.

Full text

Abstract:

In this paper, binary Nd-Co alloys with compositional range from Nd72.5Co27.5 to Nd50Co50 were successfully vitrified into glassy state by a melt-spinning method. The glass formability of the metallic glasses (MGs) was studied and the best glass former in the binary Nd-Co alloys was obtained. Magnetic properties of the MGs were measured. The compositional dependence of Curie temperature of the MGs was observed. The mechanism for the spin-glass-like behaviors and high coercivity at low temperature, and their influence on the magnetic entropy change of the MGs, were investigated.

APA, Harvard, Vancouver, ISO, and other styles

42

Chen, Lu, and Ying Dai. "Effects of Iron Oxide on the Crystallization of Calcium Alumino-Silicate Glass." Key Engineering Materials 680 (February 2016): 293–96. http://dx.doi.org/10.4028/www.scientific.net/kem.680.293.

Full text

Abstract:

Different amounts of iron oxide (Fe2O3) were added into a base calcium alumino-silicate glass (CaO 40, Al2O3 9, SiO2 51 wt%). The crystallization behavior of the glassed was investigated by DTA, XRD, SEM and optical microscopy. DTA analysis on the samples with and without the iron additions shows that the iron-containing glasses obviously absorb more heat energy than the base glass. All the glasses show two endothermal peaks correspondent to two transition temperatures, Tg1 and Tg2, indicating the existence of phase separation. Compared with the base glass, an initial addition of 5wt% Fe2O3 does not result in significant changes in Tg1, but a large decrease in Tg2 is observed. Further additions of 10 and 15wt% Fe2O3, both Tg1 and Tg2 decreases. The iron-containing glasses show two crystallization peaks in their DTA curves. Fe2O3 facilitates the crystallization of the calcium alumino-silicate glass indicated by the decreased activation energy and increased Avrami exponent. SEM observations evidenced that the crystallintes in the heat treated samples are nanosized. It is evidenced that the base glass and the glasses containing 5 and 10 wt% Fe2O3 are surface crystallized upon heat-treatment and the main crystalline phase is wollastonite. The surface crystallization layer and the grain size increase with Fe2O3. However, an addition of 15wt% Fe2O3 results in a bulk crystallization leading to the formation of iron-and aluminum-containing phases.

APA, Harvard, Vancouver, ISO, and other styles

43

de Oliveira, Vera Lúcia Praxedes, Marcelo Henrique Prado da Silva, Eduardo de Sousa Lima, Claudinei dos Santos, and Luis Henrique Leme Louro. "Effect of Glassy Phase Additions to Zirconia on its Sintering Behavior and Microstructure." Materials Science Forum 727-728 (August 2012): 935–39. http://dx.doi.org/10.4028/www.scientific.net/msf.727-728.935.

Full text

Abstract:

TZP yttria-stabilized zirconia powder was mixed with two types of glasses as sintering additives: CAS glass and a bioactive glass. These additions were designed toward the material applications as bioceramics. The glassy phase was chosen to promote liquid phase sintering at lower temperature, when compared to pure material. This procedure contributed to reduce the fabrication costs while keeping the material biocompatibility. Each type of glass was added in concentrations of 1, 3, and 5 wt%. The prepared powders were uniaxially pressed at 50 MPa, and then sintered at 1300°C for two hours. The sintering behavior was evaluated by measuring the final sintered densities. It was found that the samples with bioactive glass additions were denser than those with CAS glass. Zirconia TZP powders without glassy additions would not sinter in this temperature. The microstructure of the sintered samples was characterized by SEM and XRD. The sintered ceramics exhibited both submicrometric and uniform grains. The analyzed grain sizes were slightly lower for the samples with CAS additions than for those with bioactive glass additions.

APA, Harvard, Vancouver, ISO, and other styles

44

Krylov, Nikolai I., Mikhail D. Mikhailov, Lev N. Blinov, and Elena V. Bochagina. "Fusible Glass Based on Glassy Chalcogenide Type Systems Ge-S(Se)Br, Ge-S(Se)I." Key Engineering Materials 822 (September 2019): 834–40. http://dx.doi.org/10.4028/www.scientific.net/kem.822.834.

Full text

Abstract:

Theoretical and practical results on the preparation and investigation of low-melting glasses using the example of glassy chalcogenide glasses of the Ge-S-Br, Ge-Se-Br systems are presented and summarized. On the basis of fundamental properties of matter, correlations were identified with uniform positions. The glass formation regularities in the indicated chalcogenide and oxyhalide systems were determined. Areas and compositions of low-melting chalcogenide and oxyhalide glasses were considered. Approaches to obtaining of thermostable and difficult to crystallize low-melting glasses were found. Areas of their practical application were identified. On the basis of the obtained data, approaches and criteria for obtaining compositions of low-melting chalcogenide and oxide glasses with practically useful properties are formulated.

APA, Harvard, Vancouver, ISO, and other styles

45

SURYANARAYANA, C., and SATYAJEET SHARMA. "GLASS FORMATION IN MECHANICALLY ALLOYED Fe-BASED SYSTEMS." Functional Materials Letters 02, no. 04 (December 2009): 147–55. http://dx.doi.org/10.1142/s1793604709000727.

Full text

Abstract:

Rapid solidification processing of metallic melts has been traditionally employed to synthesize metallic glasses in several alloy systems. However, in recent years, solid-state processing methods, and more specifically, mechanical alloying, have become popular methods to synthesize glassy phases in metallic alloy systems. Although a large number of criteria have been developed to identify alloy compositions that can be solidified into the glassy state, very few attempts have been made to predict the glass-forming ability by solid-state processing methods. To evaluate if some clear criteria could be developed to predict glass formation by solid-state processing methods and to understand the mechanism of glass formation, mechanical alloying of powder blends was conducted on several Fe -based alloy systems. Three different aspects of glass formation are specifically discussed in this paper. One is the development of a criterion for identifying glass-forming systems from phase diagram features, the second is the process of mechanical crystallization (formation of a crystalline phase on continued milling of the amorphous powders obtained by mechanical alloying), and the third is the novel phenomenon of lattice contraction during amorphization. It was shown that the conditions under which a glassy phase is formed by mechanical alloying are different from the solidification methods.

APA, Harvard, Vancouver, ISO, and other styles

46

Sheng, Wen Bin, Chun Ming Zhang, and Wan Li Gu. "Investigation on Correlation between the Modified Criterion and the Glass-Forming Ability for Metallic Glasses." Advanced Materials Research 97-101 (March 2010): 591–96. http://dx.doi.org/10.4028/www.scientific.net/amr.97-101.591.

Full text

Abstract:

A modified criterion γ’ (=Tx/(1.5Tg+Tl) of glass-forming ability (GFA) for metallic glasses is suggested on the basis of present criterion γ (=Tx/(Tg+Tl) that correlates well with some systems including metallic glasses, some glassy oxides and some cryo-protective aqueous solutions. Results show that the modified criterion γ’ shows stronger correlation with the critical cooling rate Rc for metallic glasses than the criterion γ, which is demonstrated by a value increase in the statistical correlation parameter R2 from 0.9022 to 0.9037. Furthermore, a modified equation is given to reflect the relationship between γ’ and Rc.

APA, Harvard, Vancouver, ISO, and other styles

47

Saakyan, Emma, Artavazd Arzumanyan, and Gagik Galstyan. "New Energy Efficient Technology of Cellular Glass." Key Engineering Materials 828 (December 2019): 146–52. http://dx.doi.org/10.4028/www.scientific.net/kem.828.146.

Full text

Abstract:

On the base of volcanic glass - perlite, the energy-efficient technology of cellular glass for heat-insulating purposes has been developed. Compositions of nanosized modifier and redox gas formers were developed by the method of experimental-statistical modeling and optimization of probability parameters, allowing to obtain cellular glasses with low average density and almost closed porosity in a single technological process at technologically acceptable temperatures. In the production of cellular glasses (foam glass) of new generation, based on natural glassy rocks of silicate and aluminosilicate composition modified with sodium hydroxide, in the presence of water and gas-forming additives, during mixing and sintering, the components react at the nanoscale level to form glass under low softening temperature and sufficient quantity of foam stabilizers. The main scientific results - the use of nanotechnological modification of amorphous silicate and aluminosilicate rocks in the technology of cellular glass for construction and technical purposes, the development of compositions and method for the production of cellular glass using energy-saving technology with the following performance parameters: average density of 115...250kg/m3, coefficient of thermal conductivity 0,051...0.075W/(m•K), water absorption 1.6...4.0%, compressive strength 0.14...4.20 MPa, hydrolytic glass class I...III.

APA, Harvard, Vancouver, ISO, and other styles

48

Zhang, Qing Sheng, Wei Zhang, Dmitri V. Louzguine-Luzgin, and Akihisa Inoue. "High Glass-Forming Ability and Unusual Deformation Behavior of New Zr-Cu-Fe-Al Bulk Metallic Glasses." Materials Science Forum 654-656 (June 2010): 1042–45. http://dx.doi.org/10.4028/www.scientific.net/msf.654-656.1042.

Full text

Abstract:

A new series of bulk metallic glasses were developed by addition of Fe into the ternary Zr60Cu30Al10 alloy. Although Fe-Cu element pair shows distinct immiscibility with a large positive heat of mixing, substitution of Fe for Cu significantly improves the glass-forming ability of the ternary Zr60Cu30Al10 alloy. The critical diameter for glass-formation increases from 8 mm for Zr60Cu30Al10 alloy to 20 mm for Zr60Cu25Fe5Al10 and Zr62.5Cu22.5Fe5Al10 alloys. As compared with the ternary Zr60Cu30Al10 alloy, the new quaternary Zr-Cu-Fe-Al alloys show lower liquidus temperatures. The Zr60Cu25Fe5Al10 and Zr62.5Cu22.5Fe5Al10 alloys, the best BMG-formers in this alloy system, are found to locate very near a Zr-Cu-Fe-Al eutectic point. The new Zr-Fe-Cu-Al bulk metallic glasses exhibit high strength of about 1700 MPa. The plastic strain increases from 7.8% to 11.3% with increasing the content of Fe from 0 to 12.5%. The finding of a Ni-free Zr-based bulk glassy alloy with the extremely high glass-forming ability is expected to extend the future application of bulk metallic glasses.

APA, Harvard, Vancouver, ISO, and other styles

49

Gleiter, Herbert. "Nanoglasses: a new kind of noncrystalline materials." Beilstein Journal of Nanotechnology 4 (September 13, 2013): 517–33. http://dx.doi.org/10.3762/bjnano.4.61.

Full text

Abstract:

Nanoglasses are a new class of noncrystalline solids. They differ from today’s glasses due to their microstructure that resembles the microstructure of polycrystals. They consist of regions with a melt-quenched glassy structure connected by interfacial regions, the structure of which is characterized (in comparison to the corresponding melt-quenched glass) by (1) a reduced (up to about 10%) density, (2) a reduced (up to about 20%) number of nearest-neighbor atoms and (3) a different electronic structure. Due to their new kind of atomic and electronic structure, the properties of nanoglasses may be modified by (1) controlling the size of the glassy regions (i.e., the volume fraction of the interfacial regions) and/or (2) by varying their chemical composition. Nanoglasses exhibit new properties, e.g., a Fe90Sc10 nanoglass is (at 300 K) a strong ferromagnet whereas the corresponding melt-quenched glass is paramagnetic. Moreover, nanoglasses were noted to be more ductile, more biocompatible, and catalytically more active than the corresponding melt-quenched glasses. Hence, this new class of noncrystalline materials may open the way to technologies utilizing the new properties.

APA, Harvard, Vancouver, ISO, and other styles

50

Stefanovsky, S. V., M. V. Skvortsov, O. I. Stefanovsky, B. S. Nikonov, I. A. Presniakov, I. S. Glazkova, and A. G. Ptashkin. "Preparation and Characterization of Borosilicate Glass Waste Form for Immobilization of HLW from WWER Spent Nuclear Fuel Reprocessing." MRS Advances 2, no. 11 (December 19, 2016): 583–89. http://dx.doi.org/10.1557/adv.2016.622.

Full text

Abstract:

ABSTRACTBorosilicate glassy materials for immobilization of HLW from Russian WWER (PWR) spent nuclear fuel reprocessing were designed, synthesized in a resistive furnace, and characterized by XRD, SEM/EDS, and FTIR spectroscopy. Chemical durability was determined by PCT-A procedure and compared to EPA glass and reference data. The glasses with 20 and 25 wt.% waste loading were found to be X-ray amorphous, homogeneous and chemically durable. Glass network formally had a relatively low degree of connectedness that was increased due to embedding of different structural groups thus improving chemical durability. Boron is present primarily in trigonal oxygen coordination. The glasses with 40-45 wt.% waste loading contained minor britholite phase concentrating rare earth elements and as expected trivalent actinides. Glassy product with up to 30 wt.% waste loading was also produced by cold crucible inductive melting at the IPCE RAS lab-scale unit equipped with 56 mm inner diameter copper cold crucible and energized from a 10 kW/5.28 MHz generator. The product was composed of vitreous phase and minor britholite with average composition K0.39Sr1.99Fe0.16Nd5.50Si7.96O26.60.

APA, Harvard, Vancouver, ISO, and other styles

Journal articles on the topic 'Glasse'

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles