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1

Levasseur, A., and M. Menetrier. "Borate based lithium conducting glasses." Materials Chemistry and Physics 23, no. 1-2 (August 1989): 1–12. http://dx.doi.org/10.1016/0254-0584(89)90013-8.

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2

Østergaard, Martin B., Mikkel S. Bødker, and Morten M. Smedskjaer. "Structure Dependence of Poisson’s Ratio in Cesium Silicate and Borate Glasses." Materials 13, no. 12 (June 24, 2020): 2837. http://dx.doi.org/10.3390/ma13122837.

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In glass materials, Poisson’s ratio (ν) has been proposed to be correlated with a variety of features, including atomic packing density (Cg), liquid fragility (m), and network connectivity. To further investigate these correlations in oxide glasses, here, we study cesium borate and cesium silicate glasses with varying modifier/former ratio given the difference in network former coordination and because cesium results in relatively high ν compared to the smaller alkali modifiers. Within the binary glass series, we find positive correlations between ν on one hand and m and Cg on the other hand. The network former is found to greatly influence the correlation between ν and the number of bridging oxygens (nBO), with a negative correlation for silicate glasses and positive correlation for borate glasses. An analysis based on topological constraint theory shows that this difference cannot be explained by the effect of superstructural units on the network connectivity in lithium borate glasses. Considering a wider range of oxide glasses from the literature, we find that ν generally decreases with increasing network connectivity, but with notable exceptions for heavy alkali borate glasses and calcium alumino tectosilicate glasses.
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3

Ruengsri, Suwimon. "Radiation Shielding Properties Comparison of Pb-Based Silicate, Borate, and Phosphate Glass Matrices." Science and Technology of Nuclear Installations 2014 (2014): 1–5. http://dx.doi.org/10.1155/2014/218041.

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Theoretical calculations of mass attenuation coefficients, partial interactions, atomic cross-section, and effective atomic numbers of PbO-based silicate, borate, and phosphate glass systems have been investigated at 662 keV. PbO-based silicate glass has been found with the highest total mass attenuation coefficient and then phosphate and borate glasses, respectively. Compton scattering has been the dominate interaction contributed to the different total attenuation coefficients in each of the glass matrices. The silicate and phosphate glass systems are more appropriate choices as lead-based radiation shielding glass than the borate glass system. Moreover, comparison of results has shown that the glasses possess better shielding properties than standard shielding concretes, suggesting a smaller size requirement in addition to transparency in the visible region.
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4

Bobkova, N. M., and S. A. Khot'ko. "Low-Melting Glasses Based on Borate Systems." Glass and Ceramics 61, no. 5/6 (May 2004): 175–77. http://dx.doi.org/10.1023/b:glac.0000043085.41234.be.

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5

Kojima, Seiji. "Mixed-Alkali Effect in Borate Glasses: Thermal, Elastic, and Vibrational Properties." Solids 1, no. 1 (November 19, 2020): 16–30. http://dx.doi.org/10.3390/solids1010003.

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When oxide glasses are modified by dissimilar alkali ions, a maximum in the electric resistivity or the expansion coefficient appears, called the mixed-alkali effect (MAE). This paper reviews the MAE on the thermal, elastic, and vibrational properties of the mixed-cesium lithium borate glasses, x{(1−y)Cs2O-yLi2O}-(1−x)B2O3. For the single-alkali borate glasses, xM2O(1−x)-B2O3 (M = Li, Na, K, Rb, and Cs), the glass transition temperature, Tg = 270 °C, of a borate glass monotonically increases as the alkali content x increases. However, for the mixed-cesium lithium borate glasses the Tg shows the minimum against the lithium fraction y. The dependences of the elastic properties on the lithium fraction y were discussed regarding the longitudinal modulus, Poisson’s ratio, and Cauchy-type relation. The internal vibrational bands related to the boron-oxide structural groups and the splitting of a boson peak were discussed based on Raman scattering spectroscopy. The MAE on various physical properties are discussed on the basis of the changes in the coordination number of the borons and the nonbridging oxygens caused by the dissimilar alkali ions.
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6

Brow, Richard K., Todd M. Alam, David R. Tallant, and R. James Kirkpatrick. "Spectroscopic Studies on the Structures of Phosphate Sealing Glasses." MRS Bulletin 23, no. 11 (November 1998): 63–67. http://dx.doi.org/10.1557/s088376940003102x.

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Phosphate glasses generally have lower glass-transition temperatures and greater thermal-expansion coefficients than silicate and borate glasses, and so are candidate materials for specialty glass-metal sealing applications. Phosphate glasses also have desirable optical properties (rare-earth stimulated-emission cross sections, low thermo-optical coefficients, ultraviolet transparency, etc.) and so are used as laser glasses. Recent developments of novel compositions for biomedical applications and as fast-ion conductors have also revived interest in the study of phosphate glass structures.The structure/property relationships in simple phosphate glasses have not received nearly the attention paid to silicate and borate-based systems. This is partially due to the difficulty in preparing anhydrous compositions with more than 50-mol% P2O5. Ultraphosphate compositions (where the [O]/[P] ratio is less than 3) are highly reactive to ambient water. In addition because P2O5 sublimes at about 300°C, ultraphosphate glasses have not been studied to the extent that metaphosphate ([O]/[P] = 3) and polyphosphate ([O]/[P] > 3) compositions have.
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7

Pisarska, Joanna, Marta Kuwik, and Wojciech A. Pisarski. "Spectroscopic Properties of Inorganic Glasses Doped with Pr3+: A Comparative Study." Materials 15, no. 3 (January 20, 2022): 767. http://dx.doi.org/10.3390/ma15030767.

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The results presented in this communication concern visible and near-IR emission of Pr3+ ions in selected inorganic glasses, i.e., borate-based glass with Ga2O3 and BaO, lead-phosphate glass with Ga2O3, gallo-germanate glass modified by BaO/BaF2, and multicomponent fluoride glass based on InF3. Glasses present several emission bands at blue, reddish orange, and near-infrared spectral ranges, which correspond to 4f–4f electronic transitions of Pr3+. The profiles of emission bands and their relative intensity ratios depend strongly on glass-host. Visible emission of Pr3+ ions is tuned from red/orange for borate-based glass to nearly white light for multicomponent fluoride glass based on InF3. The positions and spectral linewidths for near-infrared luminescence bands at the optical telecommunication window corresponding to the 1G4 → 3H5, 1D2 → 1G4, and 3H4 → 3F3,3F4 transitions of Pr3+ are dependent on glass-host matrices and excitation wavelengths. Low-phonon fluoride glasses based on InF3 and gallo-germanate glasses with BaO/BaF2 are excellent candidates for broadband near-infrared optical amplifiers. Spectroscopic properties of Pr3+-doped glasses are compared and discussed in relation to potential optical applications.
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8

MA, Frechero, Cardillo E, Molina MC, Sola ME, Terny S, and Di Pratula P. "Effect of small mobile cations on molybdenumborate glasses." Material Science & Engineering International Journal 2, no. 6 (November 21, 2018): 199–204. http://dx.doi.org/10.15406/mseij.2018.02.00057.

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Lithium borate glasses modified with molybdenum oxide according to the formula: xMoO3 (1-x)[0.25 Li2O 0.75 B2O3] prepared by the melt quenching technique were studied. Density, differential thermal analysis, FTIR and impedance spectroscopic were used to analyze these systems. It was confirmed that the glassy matrix of these systems was based on the MoO6 octahedral units and on BO3 and BO4 units. The results explained how the stability of a borate matrix that hosted molybdenum ions was affected by the presence of small mobile ions (lithium ions in the present case). It was found that concentration of molybdenum oxide was restricted by strong interactions between the charged molybdenum structures and the mobile ions due to the presence of order forces that promote the formation of crystalline structures. Keywords: molybdenum, oxide glasses, electrical properties, borate glass stability
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9

Pisarska, Joanna, and Wojciech Pisarski. "Replacement of glass-former B2O3 by GeO2 in amorphous host evidenced by optical methods." Photonics Letters of Poland 9, no. 4 (December 31, 2017): 113. http://dx.doi.org/10.4302/plp.v9i4.790.

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Two completely different glass-host matrices containing lead, i.e. borate and germanate glasses doped with erbium were studied. Replacement of glass-former B2O3 by GeO2 in amorphous host was evidenced by optical methods. The luminescence decay from the 4I13/2 upper laser state of Er3+ ions is relatively short, whereas up-converted emission signal is reduced definitely in borate glass containing lead due to its high B-O stretching vibrations. The results indicate that germanate glasses containing lead are promising for near-infrared luminescence and up-conversion applications. Full Text: PDF ReferencesR. Balda, A. Oleaga, J. Fernandez, J.M. Fdez-Navarro, "Spectroscopy and frequency upconversion of Er3+ ions in lead niobium germanate glasses", Opt. Mater. 24, 83 (2003). CrossRef H. Yamauchi, Y. Ohishi, "Spectroscopic properties of Er3+-doped PbO?Ga2O3?GeO2 glass for optical amplifiers", Opt. Mater. 27, 679 (2005). CrossRef W.A. Pisarski, Ł. Grobelny, J. Pisarska, R. Lisiecki, W. Ryba-Romanowski, "Spectroscopic properties of Yb3+ and Er3+ ions in heavy metal glasses", J. Alloys Compd. 509, 8088 (2011). CrossRef M.B. Saisudha, J. Ramakrishna, "Effect of host glass on the optical absorption properties of Nd3+, Sm3+, and Dy3+ in lead borate glasses", Phys. Rev. B 53, 6186 (1996). CrossRef C.K. Jayasankar, V. Venkatramu, S. Surendra Babu, P. Babu, "Luminescence properties of Dy3+ ions in a variety of borate and fluoroborate glasses containing lithium, zinc, and lead", J. Alloys Compd. 374, 22 (2004). CrossRef W.A. Pisarski et al. "Luminescence spectroscopy of rare earth-doped oxychloride lead borate glasses", J. Lumin. 131, 649 (2011). CrossRef M. Kochanowicz, W. Mazerski, J. Żmojda, K. Czajkowski, D. Dorosz, "Green upconversion emission in tellurite optical fibre codoped with Yb3+/Er3+", Phot. Lett. Poland 5, 35 (2013). CrossRef J. Dorosz, "Novel constructions of optical fibers doped with rare ? earth ions", Ceramics 86 (2005). CrossRef J. Żmojda, D. Dorosz, M. Kochanowicz, J. Dorosz, "Spectroscopic properties of Yb3+/Er3+ - doped antimony-phosphate glasses for fiber amplifiers", Phot. Lett. Poland 2, 76 (2010). CrossRef J. Dorosz, R. S. Romaniuk, "Development of Optical Fiber Technology in Poland", INTL J. Electron. Telecom. 57, 191 (2011). CrossRef Q.Y. Zhang et al. "Effects of PbF2 doping on structure and spectroscopic properties of Ga2O3?GeO2?Bi2O3?PbO glasses doped with rare earths", J. Appl. Phys. 99, 033510 (2006) CrossRef W.A. Pisarski, G. Dominiak-Dzik, W. Ryba-Romanowski, J. Pisarska, "Role of PbO substitution by PbF2 on structural behavior and luminescence of rare earth-doped lead borate glass", J. Alloys Compd. 451, 220 (2008). CrossRef M. Sołtys, J. Pisarska, L. Żur, T. Goryczka, W.A. Pisarski, "Influence of M2O3 (M = Al, Ga) glass modifiers on structure, thermal and spectroscopic properties of rare earth ions in lead phosphate based systems", Proc. SPIE 9228, 92280A (2014). CrossRef J. Janek, J. Pisarska, W.A. Pisarski, "Rare earth doped lead-free germanate glasses for modern photonics", Phot. Lett. Poland 6, 71 (2014). CrossRef W.A. Pisarski et al. "Infrared-to-visible conversion luminescence of Er3+ ions in lead borate transparent glass-ceramics", Opt. Mater. 31, 1781 (2009). CrossRef J. Pisarska, L. Żur, W.A. Pisarski, "Optical spectroscopy of Dy3+ ions in heavy metal lead-based glasses and glass?ceramics", J. Mol. Struct. 993, 160 (2011). CrossRef L. Żur, M. Sołtys, J. Pisarska, W.A. Pisarski, "Absorption and luminescence properties of terbium ions in heavy metal glasses", J. Alloys Compd. 578, 512 (2013). CrossRef W.A. Pisarski, L. Żur, M. Kowal, J. Pisarska, "Enhancement and quenching photoluminescence effects for rare earth ? Doped lead bismuth gallate glasses", J. Alloys Compd. 651, 565 (2015). CrossRef M. Shojiya, Y. Kawamoto, K. Kadono, "Judd?Ofelt parameters and multiphonon relaxation of Ho3+ ions in ZnCl2-based glass", J. Appl. Phys. 89, 4944 (2001). CrossRef
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10

Edelman, I. S., O. S. Ivanova, and R. D. Ivantsov. "Magnetooptical Studies of Nanoparticle-Containing Borate Glasses." Solid State Phenomena 168-169 (December 2010): 525–28. http://dx.doi.org/10.4028/www.scientific.net/ssp.168-169.525.

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Faraday rotation (FR) and magnetic circular dichroism (MCD) of nanocomposite structures based on potassium-aluminum-germanium-boron glasses co-doped with Fe and rare earth (RE) or Y+Bi oxides have been studied. Formation of magnetic nanoparticles as a result of the glass heat treatment ensures them magnetic and magneto-optical properties typical of magnetically ordered substances. At the same time, glasses keep transparence in visual spectral range owing to low paramagnetic oxides concentration. FR and MCD spectra of the heat treated glasses are shown to be very close to those of γ-Fe2O3 and practically independent of the RE element nature for the light wave energies lower than 22000 cm-1. For higher energies, the MCD spectrum shape depends strongly on RE what evidences the different origin of magneto-optical effects in two spectral ranges.
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11

Venkatramaiah, N., and R. Venkatesan. "Porphyrin based hybrid borate glasses: Structure and photophysical investigation." Materials Chemistry and Physics 125, no. 3 (February 2011): 729–38. http://dx.doi.org/10.1016/j.matchemphys.2010.09.065.

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12

Bobkova, N. M. "Low-melting glasses based on lead-borate systems (review)." Glass and Ceramics 66, no. 5-6 (May 2009): 206–9. http://dx.doi.org/10.1007/s10717-009-9170-2.

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13

Bobkova, N. M., G. B. Zakharevich, and O. V. Kichkailo. "Low-melting low-lead glasses based on borate systems." Glass and Ceramics 67, no. 1-2 (June 11, 2010): 15–18. http://dx.doi.org/10.1007/s10717-010-9220-9.

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14

Qiu, Jianrong, and Kazuyuki Hirao. "The Faraday effect in diamagnetic glasses." Journal of Materials Research 13, no. 5 (May 1998): 1358–62. http://dx.doi.org/10.1557/jmr.1998.0192.

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The wavelength dispersions of the Faraday effect in typical diamagnetic glasses, i.e., silica, borate, silicate, tellurite, lead-bismuth-gallate, and As2S3, have been examined. The Verdet constant of the glasses decreases with increasing wavelength in the longer wavelength region of the absorption edge of the glasses, while it increases with increasing optical bandgap of the glasses. These phenomena have been successfully explained based on the Becquerel theory. A guiding principle in designing a diamagnetic glass with a high Verdet constant is proposed.
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15

Wei, Wang He, Min Lu, and Chun Ju Hou. "Theoretical Studies of the Local Structures and Spin Hamiltonian Parameters for the Cu2+ Centers in Alkali Barium Borate Glasses." Defect and Diffusion Forum 344 (October 2013): 89–93. http://dx.doi.org/10.4028/www.scientific.net/ddf.344.89.

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The spin Hamiltonian parameters (g factors g||, g and the hyperfine structure constants A||, A) for the Cu2+centers in alkali barium borate glasses were theoretically studied based on the high-order perturbation formulas of these parameters for a 3d9ion in a tetragonally elongated octahedron. From the calculations, the ligand octahedra around Cu2+are suggested to suffer about 9.4%, 10.7%, and 11.1% relative elongation along C4 axis for the alkali barium borate glasses (Li-Ba-B, Na-Ba-B and K-Ba-B, respectively), the results are in good agreement with the observed values. In addition, the negative signs for A|| and A of the studied Cu2+centers were also suggested in the discussion.
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16

Tajuddin, Hamiza Ahmad, Husin Wagiran, and Rosli Hussin. "The Thermoluminescence Response of Dy Doped Calcium Borate Glass Subjected to 6MV Photon Irradiation." Advanced Materials Research 895 (February 2014): 390–94. http://dx.doi.org/10.4028/www.scientific.net/amr.895.390.

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This paper presents the thermoluminescence (TL) response and sensitivity of various dopant concentration of Dy into borate glass. Borates glass present absorption coefficient that closely to human bone and teeth. This fact makes borate as an ideal material for TL material either for medical or environmental dosimeter. Therefore, a series of glasses based on xCaO-(100-x)B2O3system (0 x 100) % weight has been prepared by using melt quenching method. In this research, Dy doped (0.01-0.4) mol% to 30CaO-70B2O3glass sample were studied to investigate the TL properties in terms of dose-response relationship and sensitivity. Samples were irradiated to various doses range 0.5-4.0 Gy subjected to 6 MV photon irradiation by using LINAC Primus MLC 3339. The TL intensity of various dopant concentration were studied and it was founds that the 0.3 mol% Dy has the highest TL response and has linear dose response relationship. The highest sensitivity was calculated as 58 nC.mg-1.Gy-1for 0.3 mol% Dy concentration.
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17

Gowda, V. C. Veeranna, R. V. Anavekar, and K. J. Rao. "Elastic properties of fast ion conducting lithium based borate glasses." Journal of Non-Crystalline Solids 351, no. 43-45 (November 2005): 3421–29. http://dx.doi.org/10.1016/j.jnoncrysol.2005.09.002.

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18

Donald, I. W., B. L. Metcalfe, D. J. Bradley, M. J. C. Hill, J. L. McGrath, and A. D. Bye. "The preparation and properties of some lithium borate based glasses." Journal of Materials Science 29, no. 24 (December 1994): 6379–96. http://dx.doi.org/10.1007/bf00353994.

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19

Kermani, Farzad, Simin Nazarnezhad, Zahra Mollaei, Sahar Mollazadeh, Alireza Ebrahimzadeh-Bideskan, Vahid Reza Askari, Reza Kazemi Oskuee, et al. "Zinc- and Copper-Doped Mesoporous Borate Bioactive Glasses: Promising Additives for Potential Use in Skin Wound Healing Applications." International Journal of Molecular Sciences 24, no. 2 (January 9, 2023): 1304. http://dx.doi.org/10.3390/ijms24021304.

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In this study, zinc (Zn)- and copper (Cu)-doped 13-93B3 borate mesoporous bioactive glasses (MBGs) were successfully synthesized using nitrate precursors in the presence of Pluronic P123. We benefited from computational approaches for predicting and confirming the experimental findings. The changes in the dynamic surface tension (SFT) of simulated body fluid (SBF) were investigated using the Du Noüy ring method to shed light on the mineralization process of hydroxyapatite (HAp) on the glass surface. The obtained MBGs were in a glassy state before incubation in SBF. The formation of an apatite-like layer on the SBF-incubated borate glasses was investigated by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The incorporation of Zn and Cu into the basic composition of 13-93B3 glass led to changes in the glass transition temperature (Tg) (773 to 556 °C), particle size (373 to 64 nm), zeta potential (−12 to −26 mV), and specific surface area (SBET) (54 to 123 m2/g). Based on the K-means algorithm and chi-square automatic interaction detection (CHAID) tree, we found that the SFT of SBF is an important factor for the prediction and confirmation of the HAp mineralization process on the glasses. Furthermore, we proposed a simple calculation, based on SFT variation, to quantify the bioactivity of MBGs. The doped and dopant-free borate MBGs could enhance the proliferation of mouse fibroblast L929 cells at a concentration of 0.5 mg/mL. These glasses also induced very low hemolysis (<5%), confirming good compatibility with red blood cells. The results of the antibacterial test revealed that all the samples could significantly decrease the viability of Pseudomonas aeruginosa. In summary, we showed that Cu-/Zn-doped borate MBGs can be fabricated using a cost-effective method and also show promise for wound healing/skin tissue engineering applications, as especially supported by the cell test with fibroblasts, good compatibility with blood, and antibacterial properties.
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20

Glumglomchit, Punsak, Juniastel Rajagukguk, Jakrapong Kaewkhao, and Keerati Kirdsiri. "A Novel Radiation Shielding Material for Gamma-Ray: The Development of Lutetium Lithium Borate Glasses." Key Engineering Materials 766 (April 2018): 246–51. http://dx.doi.org/10.4028/www.scientific.net/kem.766.246.

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This work, gamma-ray shielding properties of the lutetium lithium borate glasses in the system Lu2O3 - Li2O - B2O3 have been evaluated as a shielding material at 662 keV photon energy. While the experimental mass attenuation coefficients (μm) have been determined by using the narrow beam transmission method, the theoretical data were calculated using WinXCom program. The good agreements between experimental and theoretical values have been obtained. Both experimental and computational mass attenuation coefficients data were used to obtain the effective atomic number (Zeff), and the effective electron density (Nel). Based on the obtained data, the Lu-based glasses have good shielding properties, the improved glasses could be used as gamma-rays shielding material.
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21

Padlyak, Bohdan V. "New Effective Luminescent Materials Based On The Sm-Doped Borate Glasses." Advanced Materials Letters 8, no. 6 (June 1, 2017): 723–34. http://dx.doi.org/10.5185/amlett.2017.1436.

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22

Ciceo-Lucacel, Raluca, and Ioan Ardelean. "FT-IR and Raman study of silver lead borate-based glasses." Journal of Non-Crystalline Solids 353, no. 18-21 (June 2007): 2020–24. http://dx.doi.org/10.1016/j.jnoncrysol.2007.01.066.

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23

Ottomeyer, Megan, Ali Mohammadkah, Delbert Day, and David Westenberg. "Broad-Spectrum Antibacterial Characteristics of Four Novel Borate-Based Bioactive Glasses." Advances in Microbiology 06, no. 10 (2016): 776–87. http://dx.doi.org/10.4236/aim.2016.610076.

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24

Alajerami, Y. S., D. A. Drabold, M. H. A. Mhareb, Kashi N. Subedi, Katherine Leslee A. Cimatu, and Gang Chen. "Physical, structural, and shielding properties of cadmium bismuth borate-based glasses." Journal of Applied Physics 127, no. 17 (May 7, 2020): 175102. http://dx.doi.org/10.1063/1.5143116.

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25

Ota, Rikuo, Taturo Yasuda, and Jiro Fukunaga. "Structure of alkali borate glasses based on the chemical equilibrium concept." Journal of Non-Crystalline Solids 116, no. 1 (January 1990): 46–56. http://dx.doi.org/10.1016/0022-3093(90)91044-r.

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26

Prasanth, M., N. Ravi, K. Thyagarajan, and K. Venkata Krishnaiah. "Thermal and structural studies of Bismuth Borate glasses modified with Gadolinium Oxide for solid state lighting applications." IOP Conference Series: Materials Science and Engineering 1233, no. 1 (March 1, 2022): 012002. http://dx.doi.org/10.1088/1757-899x/1233/1/012002.

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Abstract Bismuth based borate glasses with combination B2O3 –Bi2O3 – Gd2O3 - K2O-Li2O (BBiGdKLi) were prepared by melt-quenching method at 1250 °C for thermal and structural properties investigation.. Glass transition temperature (Tg) was observed at 681 K in heat capacity (Cp) vs temperature plot. As the temperature increases the specific heat or heat capacity also increases but a sudden fall in Cp was noticed at 962 K which is known to be crystalline temperature (Tc) of BBiGdKLi glass. Borate units comprising non-bridging oxygen (NBO) such as υ(B-O-Gd/Bi/K/Li) occured due to asymmetric stretching vibration at 976 cm-1 revealed in Raman spectrum excited by 532 nm laser. B1s, Bi 4f and Gd 4d binding energies from the XPS spectra of BBiGdKLi glass are corresponding to 188.9, 156.35 & 161.75 and 156.35 & 161.7 eV, respectively. The thermal behavior of BBiGdKLi glass suggest that these glasses could be significant materials for solid state lighting applications.
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27

Goud, K., Ch Ramesh, and B. Appa Rao. "Upconversion and Spectroscopic Properties of Rare Earth Codoped Lead Borate Glass Matrix." Material Science Research India 14, no. 2 (September 12, 2017): 140–45. http://dx.doi.org/10.13005/msri/140209.

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To develop efficient upconversion laser materials in the visible region an active lead borate glasses doped with Er3+/Yb3+ rare earth ions (GEY) has been studied extensively. In this investigation characterization techniques like Optical absorption, FTIR and photoluminescence were recorded and the data was analyzed. To evaluate the values of Ω2, Ω4 and Ω6 Judd-Ofelt theory has been applied to the f ↔ f transitions. Based on Judd–Ofelt theory branching ratio (βr) oscillator strength and the radiative life time (τR) values were determined. The upconversion spectra exhibited three emission bands at around 525 nm (2H11/2 ® 4I15/2), 545 nm (4S3/2 ® 4I15/2) and 660 nm (4F9/2 ® 4I15/2). The energy transfer mechanism between Yb3+ and Er3+ was discussed very clearly. Comparing the data obtained in other Er3+/Yb3+ doped materials, the lead bismuth gallium borate glasses doped with 0.6 mol% of Er2O3­/0.2 mol% of Yb2O3 ions are suitable materials for developing red upconversion lasers in the visible region.
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28

Mehrer, Helmut. "Diffusion and Ion Conduction in Cation-Conducting Oxide Glasses." Diffusion Foundations 6 (February 2016): 59–106. http://dx.doi.org/10.4028/www.scientific.net/df.6.59.

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In this Chapter we review knowledge about diffusion and cation conduction in oxide glasses. We first remind the reader in Section 1 of major aspects of the glassy state and recall in Section 2 the more common glass families. The diffusive motion in ion-conducting oxide glasses can be studied by several techniques – measurements of radiotracer diffusion, studies of the ionic conductivity by impedance spectroscopy, viscosity studies and pressure dependent studies of tracer diffusion and ion conduction. These methods are briefly reviewed in Section 3. Radiotracer diffusion is element-specific, whereas ionic conduction is not. A comparison of both types of experiments can throw considerable light on the question which type of ions are carriers of ionic conduction. For ionic conductors Haven ratios can be obtained from the tracer diffusivity and the ionic conductivity for those ions which dominate the conductivity.In the following sections we review the diffusive motion of cations in soda-lime silicate glass and in several alkali-oxide glasses based mainly on results from our laboratory published in detail elsewhere, but we also take into account literature data.Section 4 is devoted to two soda-lime silicate glasses, materials which are commonly used for window glass and glass containers. A comparison between ionic conductivity and tracer diffusion of Na and Ca isotopes, using the Nernst-Einstein relation to deduce charge diffusivities, reveals that sodium ions are the carriers of ionic conduction in soda-lime glasses. A comparison with viscosity data on the basis of the Stokes-Einstein relation shows that the SiO2 network is many orders of magnitude less mobile than the relatively fast diffusing modifier cations Na. The Ca ions are less mobile than the Na ions but nevertheless Ca is considerably more mobile than the network.Section 5 summarizes results of ion conduction and tracer diffusion for single Na and single Rb borate glasses. Tracer diffusion and ionic conduction have been studied in single alkali-borate glasses as functions of temperature and pressure. The smaller ion is the faster diffusing species in its own glass. This is a common feature of all alkali oxide glasses. The Haven ratio of Na in Na borate glass is temperature independent whereas the Haven ratio of Rb diffusion in Rb borate glass decreases with decreasing temperature.Section 6 reviews major facts of alkali-oxide glasses with two different alkali ions. Such glasses reveal the so-called mixed-alkali effect. Its major feature is a deep minimum of the conductivity near some middle composition for the ratio of the two alkali ions. Tracer diffusion shows a crossover of the two tracer diffusivities as functions of the relative alkali content near the conductivity minimum. The values of the tracer diffusivities also reveal in which composition range which ions dominate ionic conduction. Tracer diffusion is faster for those alkali ions which dominate the composition of the mixed glass.Section 7 considers the pressure dependence of tracer diffusion and ionic conduction. Activation volumes of tracer diffusion and of charge diffusion are reviewed. By comparison of tracer and charge diffusion the so-called Haven ratios are obtained as functions of temperature, pressure and composition. The Haven ratio of Rb in Rb borate glass decreases with temperature and pressure whereas that of Na in Na borate glass is almost constant.Section 8 summarizes additional common features of alkali-oxide glasses. Activation enthalpies of charge diffusion decrease with decreasing average ion-ion distance. The Haven ratio is unity for large ion-ion distances and decreases with increasing alkali content and hence with decreasing ion-ion distance.Conclusions about the mechanism of diffusion are discussed in Section 9. The Haven ratio near unity at low alkali concentrations can be attributed to interstitial-like diffusion similar to interstitial diffusion in crystals. At higher alkali contents collective, chain-like motions of several ions prevail and lead to a decrease of the Haven ratio. The tracer diffusivities have a pressure dependence which is stronger than that of ionic conductivity. This entails a pressure-dependent Haven ratio, which can be attributed to an increasing degree of collectivity of the ionic jump process with increasing pressure. Monte Carlo simulations showed that the number of ions which participate in collective jump events increases with increasing ion content – i.e. with decreasing average ion-ion distance. For the highest alkali contents up to four ions can be involved in collective motion. Common aspects of the motion process of ions in glasses and of atoms in glassy metals are pointed out. Diffusion in glassy metals also occurs by collective motion of several atoms.Section 10 summarizes the major features of ionic conduction and tracer diffusion and its temperature and pressure dependence of oxide glasses.
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29

Jung, Steven, Ted Day, Tyler Boone, Brenton Buziak, and Amin Omar. "Anti-biofilm activity of two novel, borate based, bioactive glass wound dressings." Biomedical Glasses 5, no. 1 (January 1, 2019): 67–75. http://dx.doi.org/10.1515/bglass-2019-0006.

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Abstract Bioactive glass was first developed in the late 1960’s as a compound that would facilitate bone re-growth. In more recent years, this technology has been used to promote wound healing through its ability to stimulate soft tissue growth, angiogenesis, reduce inflammation, and prevent infection. Chronically infected wounds, which result from biofilm formation, affect millions of patients in the Unites States each year and cost billions of dollars to treat. The present studies demonstrate exposure of pre-formed biofilms to bioactive glass, under simulated body conditions, resulted in significant reduction in bacterial load. Additionally, specific therapeutically active metal ions such as copper and zinc were added to a borate bioactive glass formulation through a process of ion doping and found to further enhance the anti-biofilm activity. Based on the present findings, the antibiofilm agents released by borate bioactive glasses may prove effective to eradicate the biofilm infections that prevent healing in patients with chronic wounds.
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30

Sooksaen, P., S. Kannasute, K. Larbmark, and C. Maneelada. "Bulk Crystallization of Ceramic Whiskers from Borate-Based Glass." Advanced Materials Research 488-489 (March 2012): 291–94. http://dx.doi.org/10.4028/www.scientific.net/amr.488-489.291.

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Bulk crystallization of B2O3-SiO2-Al2O3-BaO-MgO glass system was investigated. Controlled heat treatment process was carried out between 900 and 1200°C to form glass-ceramics. Phase evolution in the crystallized glasses was studied by X-ray diffraction. Microstructures of the chemically etched surfaces were revealed by scanning electron microscope and micro-hardness was measured by Vickers hardness tester. High aspect ratio of aluminium borate whiskers were in the nano to micro regime and dispersed within the residual glass matrix. Whiskers had different sizes and compositions depending on the heat treatment temperature, which affected the surface hardness of the glass-ceramics. In general, increasing heat treatment temperature led to an increase in crystal size and length as well as the surface hardness (4.8 to 5.5 GPa). The whisker crystals oriented uniformly within the residual glass matrix leading to interlocking microstructure. The synthesized glass-ceramics in this study can be applied as machinable materials in various industries because their microstructures can resist microcracking and hence increase fracture toughness.
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31

Yao, Aihua, Deping Wang, Wenhai Huang, Qiang Fu, Mohamed N. Rahaman, and Delbert E. Day. "In Vitro Bioactive Characteristics of Borate-Based Glasses with Controllable Degradation Behavior." Journal of the American Ceramic Society 90, no. 1 (January 2007): 303–6. http://dx.doi.org/10.1111/j.1551-2916.2006.01358.x.

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32

Ahmad, A. U., S. Hashim, and S. K. Ghoshal. "Spectroscopic characteristics of Dy3+ impurities–doped borate-based glasses: Judd–Ofelt calculation." Materials Chemistry and Physics 253 (October 2020): 123386. http://dx.doi.org/10.1016/j.matchemphys.2020.123386.

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33

Petrova, Olga, Ilya Taydakov, Maria Anurova, Alina Akkuzina, Roman Avetisov, Andrew Khomyakov, Elena Mozhevitina, and Igor Avetissov. "Luminescent hybrid materials based on an europium organic complex and borate glasses." Journal of Non-Crystalline Solids 429 (December 2015): 213–18. http://dx.doi.org/10.1016/j.jnoncrysol.2015.09.012.

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34

Kamitsos, E. I., M. A. Karakassides, and G. D. Chryssikos. "A vibrational study of lithium sulfate based fast ionic conducting borate glasses." Journal of Physical Chemistry 90, no. 19 (September 1986): 4528–33. http://dx.doi.org/10.1021/j100410a010.

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35

MARGHA, Fatma Hassan, Salwa Abdel-Hameed Mohamed ABDEL-HAMEED, Nagwa Abd El-Shafy GHONIM, Shigeo SATOKAWA, and Toshinori KOJIMA. "Crystallization behavior of new transparent glass-ceramics based on barium borate glasses." Journal of the Ceramic Society of Japan 116, no. 1353 (2008): 624–31. http://dx.doi.org/10.2109/jcersj2.116.624.

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36

Shaaban, Essam R., and S. H. Mohamed. "Thermal stability and crystallization kinetics of Pb and Bi borate-based glasses." Journal of Thermal Analysis and Calorimetry 107, no. 2 (February 25, 2011): 617–24. http://dx.doi.org/10.1007/s10973-011-1400-5.

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37

Prashant Kumar, M., Arunkumar V. Banagar, and N. Nagaraja. "Electrical transport studies in Na2O and Fe2O3 containing borate glasses." Physics and Chemistry of Glasses: European Journal of Glass Science and Technology Part B 64, no. 2 (April 1, 2023): 43–51. http://dx.doi.org/10.13036/17533562.64.2.20.

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A new series of (X) Na2O.(0·5−x)Fe2O3.(0·5)B2O3 of sodium and iron oxides doped borate glasses were synthesised by melt quenching. The bulk density, structural and temperature dependent electrical properties of these glasses have been investigated. The density decreased with increase in Na2O content up to Na2O=0·2 and increased thereafter. The FTIR studies indicated the presence of BO3 and BO4 groups in the network and also has shown presence of minimum NBOs at x=0·2. These results are attributed to the significant structural modifications taking place in the glass network at Na2O=0·20. The dc electrical conductivity decreased with increase in Na2O content up to Na2O=0·20 and increased for further addition of Na2O. The activation energy has increased up to 0·2 mol% of Na2O and decreased thereafter. Based on these results, it is established that at x=0·20, a changeover of dc conduction mechanism predominantly from polaronic to ionic is taking place. Mott’s SPH, Mott’s VRH and Greave’s VRH models have been used to explain the high and low temperature conductivities.
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38

Shigihalli, N. B., R. Rajaramakrishna, and R. V. Anavekar. "Optical and radiative properties of Nd3+-doped lead tellurite borate glasses." Canadian Journal of Physics 91, no. 4 (April 2013): 322–27. http://dx.doi.org/10.1139/cjp-2012-0062.

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Glass samples of composition (in mol%) 20PbO-20TeO2-(60 – x)B2O3-xNd2O3 (x = 0, 1, 2, 3, 4) were prepared by melt quenching. The glassy nature of as-quenched samples was established via differential scanning calorimetry. The amorphous nature of the glasses was confirmed via powder X-ray diffraction measurements. Judd–Ofelt (JO) analysis based on UV–visible absorption spectra was performed to determine JO parameters Ωλ (λ = 2, 4, 6). The observed trend is Ω2 > Ω6 > Ω4. The large value of Ω2 indicates the presence of covalent bonding between the Nd3+ ions and the surrounding ligands. Radiative properties, such as radiative transition probabilities, branching ratios, and radiative lifetimes are estimated. The glass samples have relatively high branching ratio, and their emission (Aem) to excited state absorption (AESA) intensity ratio is higher than one for the 4F3/2 → 4I11/2 transition, indicating that the prepared glasses may have potential laser applications.
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39

Yew, Eeu Tien, Wan Ming Hua, Poh Sum Wong, Nur Amanina Mat Jan, Zuhairi Ibrahim, and Rosli Hussin. "Structural Study of Antimony Borate Glass System Doped with Transition Metal Ions Using Infrared and Raman Spectroscopy." Advanced Materials Research 501 (April 2012): 51–55. http://dx.doi.org/10.4028/www.scientific.net/amr.501.51.

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A series of Antimony Borate glass samples were investigated to determine the structural feature. The glass samples from the series of xSb2O3:(1-x)B2O3 with composition of 20≤x≤60 mol% and 0.6 Sb2O3:0.4B2O3:y with y is 0.01 mol% of Nb2O5, CuO, ZnO system have been prepared using melt-quenching technique. The structural properties of Sb2O3 host and the introduction of dopents onto the host sample has been investigated using Infrared and RAMAN Spectroscopy. The result of IR and Raman Spectroscopy revealed that the network structure of the studied glasses is mainly based on BO3 and BO4 units placed in different structural groups, the BO3 units being dominant. IR spectra obtained shows conversion of BO3 to BO4 units upon the introduction of Sb2O3 commonly known as boron anomaly effect. The glass network can be modified with the presence of Sb2O3 and activator ions. The significant behavior in Raman Spectra indicates the presence of boroxol groups consisting of pure BO3 groups and mixed BO3-BO4 structural units. This study shows that the vibrational spectroscopy (Infrared and Raman) provide useful method, and inter-complementary information about the structural properties of antimony modified borate glasses.
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40

Tricot, Grégory, Lazzat Alpysbay, and Bertrand Doumert. "Solid State NMR: A Powerful Tool for the Characterization of Borophosphate Glasses." Molecules 25, no. 2 (January 20, 2020): 428. http://dx.doi.org/10.3390/molecules25020428.

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This review will show how solid state nuclear magnetic resonance (NMR) has contributed to a better understanding of the borophosphate glass structure. Over the last fifteen years, 1D and 2D magic angle spinning (MAS)-NMR has been used to produce key information about both local and medium range organization in this type of glass. After a brief presentation on borophosphate glasses, the paper will focus on the description of the local order of phosphate and borate species obtained by 1D 31P-and 11B-MAS-NMR experiments, with a special emphasis on the improvements obtained at high magnetic fields on the borate speciation description. The last part of this review will show how correlation NMR provided new insights into the intermediate length scale order. Special attention will be paid to the quantitative data retrieved from 11B/31P REDOR-based NMR sequences and to the qualitative connectivity schemes observed on the 2D 11B/31P maps edited with the heteronuclear multiple quantum coherence (HMQC) NMR techniques.
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41

Rodriguez, Omar, Declan J. Curran, Marcello Papini, Lana M. Placek, Anthony W. Wren, Emil H. Schemitsch, Paul Zalzal, and Mark R. Towler. "Characterization of silica-based and borate-based, titanium-containing bioactive glasses for coating metallic implants." Journal of Non-Crystalline Solids 433 (February 2016): 95–102. http://dx.doi.org/10.1016/j.jnoncrysol.2015.09.026.

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42

SAMEE, M. A., SHAIKH KAREEM AHMMAD, SAIR MD TAQIULLAH, A. EDUKONDALU, SHASHIDHAR BALE, and SYED RAHMAN. "MIXED ALKALI EFFECT IN (40-x)K2O–xLi2O-10Na2O–50B2O3 GLASSES—PHYSICAL AND OPTICAL ABSORPTION STUDIES." International Journal of Modern Physics: Conference Series 22 (January 2013): 261–67. http://dx.doi.org/10.1142/s2010194513010210.

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So far only a handful of publications have been concerned with the study of the mixed alkali effect in borate glasses containing three types of alkali ions. In the present work, the mixed alkali effect (MAE) has been investigated in the glass system (40–x) K2O–x Li2O –10Na2O–50B2O3. (0≤x≤40 mol%) through density and modulated DSC studies. The density and glass transition temperature of the present glasses varies non-linearly exhibiting mixed alkali effect. We report the mixed alkali effect in the present glasses through optical properties. From the absorption edge studies, the various values of optical band gap (Eo) and Urbach energy (ΔE) have been evaluated. The values of Eo and ΔE show non-linear behavior with compositional parameter showing the mixed alkali effect. The band gap energy based average electronic polarizability of oxide ions αO2–(Eo) , optical basicity A(Eo) , and Yamashita–Kurosawa’s interaction parameter A(Eo) have been examined to check the correlations among them and bonding character. Based on good correlation among electronic polarizability of oxide ions, optical basicity and interaction parameter, the present K2O– Li2O–Na2O–B2O3 glasses are classified as normal ionic (basic) oxides.
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43

Kolavekar, Sangeeta B., and N. H. Ayachit. "Structural analysis on the basis of effect of molybdenum on the Pr2O3 doped lead borate glasses series-II." Journal of Physics: Conference Series 2070, no. 1 (November 1, 2021): 012031. http://dx.doi.org/10.1088/1742-6596/2070/1/012031.

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Abstract This paper explains the role of molybdenum on the structural analysis of the investigated rare earth ion Pr3+ doped, lead borate (75 PbO — [25 – (x+y)]B2O3—yMoO3—xPr2O3) glass matrix has been discussed using the relation between Tg and structural parameters like average cross-link density ( n ¯ c ), average stretching force constant (F) and the number of bonds per unit volume (nb). Densities, molar volume have been measured as a function of MoO3 content. Linear variation in density and in the molar volume has been observed and is credited to the role of MoO3 in the investigated glasses. Based on the properties like good stability and bond strength, investigated glasses possibly suitable for the design of optoelectronic devices.
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44

Islam, Md Towhidul, Reda M. Felfel, Ensanya A. Abou Neel, David M. Grant, Ifty Ahmed, and Kazi M. Zakir Hossain. "Bioactive calcium phosphate–based glasses and ceramics and their biomedical applications: A review." Journal of Tissue Engineering 8 (January 1, 2017): 204173141771917. http://dx.doi.org/10.1177/2041731417719170.

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An overview of the formation of calcium phosphate under in vitro environment on the surface of a range of bioactive materials (e.g. from silicate, borate, and phosphate glasses, glass-ceramics, bioceramics to metals) based on recent literature is presented in this review. The mechanism of bone-like calcium phosphate (i.e. hydroxyapatite) formation and the test protocols that are either already in use or currently being investigated for the evaluation of the bioactivity of biomaterials are discussed. This review also highlights the effect of chemical composition and surface charge of materials, types of medium (e.g. simulated body fluid, phosphate-buffered saline and cell culture medium) and test parameters on their bioactivity performance. Finally, a brief summary of the biomedical applications of these newly formed calcium phosphate (either in the form of amorphous or apatite) is presented.
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45

Srivastava, P., S. B. Rai, and D. K. Rai. "Effect of lead oxide on optical properties of Pr3+ doped some borate based glasses." Journal of Alloys and Compounds 368, no. 1-2 (April 2004): 1–7. http://dx.doi.org/10.1016/s0925-8388(03)00742-4.

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46

Balakrishna, A., D. Rajesh, and Y. C. Ratnakaram. "Spectroscopic analysis of Ho3+ transitions in different modifier oxide based lithium–fluoro-borate glasses." Physica B: Condensed Matter 450 (October 2014): 58–66. http://dx.doi.org/10.1016/j.physb.2014.05.052.

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47

Abouhaswa, A. S., M. I. Sayyed, Abeer S. Altowyan, Y. Al-Hadeethi, and K. A. Mahmoud. "Evaluation of optical and gamma ray shielding features for tungsten-based bismuth borate glasses." Optical Materials 106 (August 2020): 109981. http://dx.doi.org/10.1016/j.optmat.2020.109981.

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48

Pisarski, W. A., J. Pisarska, G. Dominiak-Dzik, M. Mączka, and W. Ryba-Romanowski. "Compositional-dependent lead borate based glasses doped with Eu3+ ions: Synthesis and spectroscopic properties." Journal of Physics and Chemistry of Solids 67, no. 12 (December 2006): 2452–57. http://dx.doi.org/10.1016/j.jpcs.2006.06.022.

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49

Balakrishna, A., D. Rajesh, and Y. C. Ratnakaram. "Structural and photoluminescence properties of Dy3+ doped different modifier oxide-based lithium borate glasses." Journal of Luminescence 132, no. 11 (November 2012): 2984–91. http://dx.doi.org/10.1016/j.jlumin.2012.06.014.

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50

Zaman, F., G. Rooh, N. Srisittipokakun, T. Ahmad, I. Khan, M. Shoaib, Ataullah, J. Rajagukguk, and J. Kaewkhao. "Comparative investigations of gadolinium based borate glasses doped with Dy3+ for white light generations." Solid State Sciences 89 (March 2019): 50–56. http://dx.doi.org/10.1016/j.solidstatesciences.2018.12.020.

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