Dissertations / Theses on the topic 'Wall ceramic'
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Adicks, Michael Kent. "Strength characterization of thin-wall hollow ceramic spheres from slurries." Thesis, Georgia Institute of Technology, 1989. http://hdl.handle.net/1853/9318.
Full textPapazoglou, Despina. "CVD of ceramic coatings in a hot wall and fluidised bed reactor." Title page, contents and abstract only, 1994. http://web4.library.adelaide.edu.au/theses/09AS/09asp213.pdf.
Full textMartin, Laura M. "Fully Loaded." Digital Archive @ GSU, 2012. http://digitalarchive.gsu.edu/art_design_theses/110.
Full textShapiro, Michael Jay. "An experimental investigation of the thermal conductivity of thin-wall hollow ceramic spheres." Thesis, Georgia Institute of Technology, 1987. http://hdl.handle.net/1853/8667.
Full textFurlong, Scott Davis. "Reduction of radiated thermal conductivity in thin-wall hollow ceramic spheres using scattering phases." Thesis, Georgia Institute of Technology, 1990. http://hdl.handle.net/1853/9341.
Full textCampbell, Scott Alexander. "An experimental analysis of the behaviour of polymeric and ceramic pipe-wall materials subjected to the action of a cavitating water jet." Thesis, Edinburgh Napier University, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.506305.
Full textNeves, Edney Melo. "Desenvolvimento de composição cerâmica para massas de monoporosa com o uso de resíduo da indústria de papel como fonte de carbonatos." UNIVERSIDADE ESTADUAL DE PONTA GROSSA, 2013. http://tede2.uepg.br/jspui/handle/prefix/1434.
Full textThis work aims to investigate the incorporation of waste lime mud, generated by the pulp industry, in the formulations of the porous ceramic body in substitution the raw material calcite. The experiments covered the physico-chemical and mineralogical of the raw materials, the waste, and the compositions proposals. It was verified that the residue has the carbonate content slightly larger than the calcite, a larger average particle size and similar thermal properties. The ceramic bodies studied were prepared by the wet process, conformed by uniaxial pressing and sintered in an industrial furnace at 1135 °C and laboratory at temperatures of 1115 °C, 1125 °C, 1135 °C and 1145.°C with sintering cycle fast. Then, technological tests were carried total shrinkage, absorption of water, loss on ignition, mechanical strength and colorimetric coordinate. It was observed that, with the increase in substitution of calcite for the residue lime mud, the total shrinkage test samples decreased, while increasing the dimensional stability. Thus, other formulations have been proposed with the objective of keeping the shrinkage closest to standard composition. Compositions were selected, tested and characterized by differential thermal analysis and thermogravimetryc analysis, dilatometry and microstructure analysis of the fracture of the sintered specimens. The results shown to be possible to use waste "lime mud" in wall tiles compositions as a substitute for raw material calcite, keeping requirements of the NBR 13818, and with the advantage of reducing the percentage of carbonates in the composition, increased dimensional stability during sintering, lighten the color of ceramic body, addition to being an environmental solution.
Este trabalho tem por objetivo investigar a incorporação do resíduo “lama de cal”, gerado pela indústria de celulose, nas formulações de massa cerâmica de revestimento poroso em substituição a matéria-prima calcita tradicional. Os experimentos abrangeram a caracterização físico-química e mineralógica das matérias-primas, do resíduo e das composições propostas. Verificou-se que o resíduo possui o teor de carbonatos ligeiramente maior que a calcita tradicional, um maior tamanho médio de partículas, e propriedades térmicas semelhantes. As massas cerâmicas estudadas foram preparadas pelo processo via úmida, conformada por prensagem uniaxial e sinterizadas em forno industrial a 1135 °C e de laboratório nas temperaturas de 1115.°C, 1125 °C, 1135 °C e 1145 °C em ciclo de sinterização rápido. Em seguida, foram realizados os ensaios tecnológicos de retração total, de absorção de água, de perda ao fogo, de resistência mecânica e de coordenada colorimétrica. Constatou-se que, conforme o aumento da substituição da calcita tradicional pelo resíduo “lama de cal”, a retração total dos corpos de provas diminuiu, além de aumentar a estabilidade dimensional. Assim, foram propostas outras formulações com o objetivo de manter a retração próxima a composição padrão. Selecionaram-se composições e realizaram-se os ensaios de análise térmica diferencial e termogravimétrica, dilatometria, e análise da microestrutura da fratura dos corpos de prova sinterizados. Os resultados revelaram ser possível o uso do resíduo “lama de cal” em composições de monoporosa como substituto da matéria-prima calcita tradicional, mantendo os requisitos exigidos pela NBR 13818, e com as vantagens de redução do percentual de carbonatos na composição, aumento da estabilidade dimensional durante a sinterização, clarear a cor da massa, além de ser uma solução ambiental.
Щукіна, Людмила Павлівна, Георгій Вікторович Лісачук, Ярослав Олегович Галушка, Олена Юріївна Федоренко, and Лариса Олександрівна Міхеєнко. "Технологічна цінність промислових хімічних добавок при їх використанні у виробництві будівельної кераміки." Thesis, Одеський національний політехнічний університет, 2013. http://repository.kpi.kharkov.ua/handle/KhPI-Press/31485.
Full textThe technological efficiency of complex surface-active additive "MasterCeram" using to improve the properties of ceramic masses and materials in the manufacture of wall ceramics is investigated. The water-reducing effect of the additive and its positive influence on the strength of the coagulation and condensation structure of ceramic masses are established. The optimal amount of additive, which recommended for use in the manufacture of terraced wall ceramic, are established.
Gillings, Mark. "Ceramic production in a Roman frontier zone: A comparative Neutron Activation and Petro-Textural analysis of Roman coarse pottery from selected sites on and around the Antonine wall, Scotland." Thesis, University of Bradford, 1991. http://hdl.handle.net/10454/3374.
Full textSERC
Gillings, Mark. "Ceramic production in a Roman frontier zone : a comparative Neutron Activation and Petro-Textural analysis of Roman coarse pottery from selected sites on and around the Antonine wall, Scotland." Thesis, University of Bradford, 2009. http://hdl.handle.net/10454/3374.
Full textBordignon, Francesco. "Modelo de referência para o desenvolvimento de produtos cerâmicos considerando o ciclo de vida total do produto." Universidade de São Paulo, 2013. http://www.teses.usp.br/teses/disponiveis/3/3151/tde-29092013-110243/.
Full textThe present work intends to develop a specific reference model for new products and production technologies development in the Brazilian ceramic tiles industrial sector. It is based on Product Development, Total Life cycle Analysis and Management and Sustainable Products Development methodologies, integrating the industrial aspects with the environmental impact reduction and the sustainability of processes and products. The ceramic tile production sector has not yet been widely approached, as academic research, about the product and production project methodology. This work can cooperate to fulfill this gap and perform a useful contribution to a national strategic sector, for being, nowadays, Brazil the second producer and the second consumer into the world market. Form the energy point of view, the ceramic tile production is intensive and an efficient environmental impact reduction must have the main focus in the production process. The sector analysis revealed structural fragilities that must be revised to achieve an international competition level. The present research development engender, as main result, the creation of a reference model for new ceramic product and production technology project and development, based on the analysis of the current practice for product development, on the product development process theory and on its application by a comparative analysis of the state of the art in Brazil and Italy. The proposed model is validated by field research in Brazilian and Italian ceramic industries, as well as critical analysis about Life Cycle Analysis calculation. As secondary result, guidelines are presented, to apply this methodology into the national production, aiming to orient a strategic sector restructuration.
Hu, Dunzhong. "Domain wall dynamics in ferroelectric ceramics under mechanical stress." Thesis, Queen Mary, University of London, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.417388.
Full textVochozková, Jindra. "Centrum pro Hippoterapii." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2013. http://www.nusl.cz/ntk/nusl-226180.
Full textJanů, Kateřina. "Mateřská škola." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2014. http://www.nusl.cz/ntk/nusl-226573.
Full textHladký, Adam. "Hasičská stanice." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2017. http://www.nusl.cz/ntk/nusl-265360.
Full textAsp, Onsjö Isabella. "The Walls We Build." Thesis, Konstfack, Keramik & Glas, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:konstfack:diva-6371.
Full textVondrová, Michaela. "Dům pro seniory ve Velkém Poříčí." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2020. http://www.nusl.cz/ntk/nusl-410111.
Full textUlyanov, Roman. "Adaptace a dostavba domova důchodců." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2019. http://www.nusl.cz/ntk/nusl-391902.
Full textFurniss, Brandon F. "Transformation of Form." Kent State University / OhioLINK, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=kent1240088310.
Full textPasquali, Ivair. "INFLUÊNCIA DO TIPO DE ARGAMASSAMENTO NA RESISTÊNCIA À COMPRESSÃO DE PEQUENAS PAREDES DE ALVENARIA ESTRUTURAL CERÂMICA." Universidade Federal de Santa Maria, 2007. http://repositorio.ufsm.br/handle/1/7887.
Full textO presente trabalho tem com objetivo principal analisar a influência do tipo de argamassamento na resistência à compressão de pequenas paredes de alvenaria estrutural cerâmica. Para o estudo, foram utilizados dois tipos de blocos cerâmicos (paredes maciças e paredes vazadas), três tipos de argamassa (2, 4 e 10 MPa) e dois tipos argamassamento: pleno quando os blocos são assentados com argamassa em todas as suas paredes (superfície de contato) e longitudinal quando o bloco é assentado com argamassa colocada somente em dois filetes longitudinais (paredinhas externas do bloco). Os tipos de blocos e de argamassas foram caracterizados individualmente através de diversos ensaios específicos de norma e posteriormente foram confeccionadas de 72 pequenas paredes. As pequenas paredes tinham dimensões 140 mm x 450 mm x 900 mm sendo: altura de 4 fiadas + 1 canaleta u baixa de 9 cm comprimento de 1 bloco e meio largura de um bloco. Os blocos das extremidades das paredes foram montados já capeados com pasta de cimento. A análise dos resultados mostrou que, para a argamassa de 2 MPa, bloco de paredes maciças e argamassamento pleno, a resistência média é de 4,68 MPa e, para a argamassa de 10 MPa, mantendose as demais condições, a resistência média aumenta para 6,57 MPa (40,4%). Já para a argamassa de 2 MPa , bloco de paredes maciças e argamassamento longitudinal, a resistência média é de 2,90 MPa e, para a argamassa de 10 MPa, mantendose as demais condições, a resistência média aumenta para 3,33 MPa (14,8%)
Santos, Mauro Joel Friederich dos. "ANÁLISE DA RESISTÊNCIA DE PRISMAS E PEQUENAS PAREDES DE ALVENARIA ESTRUTURAL CERÂMICA PARA DIFERENTES TIPOS DE ARGAMASSAS." Universidade Federal de Santa Maria, 2008. http://repositorio.ufsm.br/handle/1/7709.
Full textEste trabalho tem como objetivo principal analisar a influência da geometria do bloco cerâmico no desempenho mecânico da alvenaria estrutural, sob compressão centrada, quando utilizadas argamassas com resistências variadas. Estudam-se dois tipos de geometrias de blocos cerâmicos: uma de paredes vazadas (BPV) e outra com paredes maciças (BPM), possuindo resistências aproximadas de 30MPa em relação a área líquida dos mesmos; também foram utilizados quatro traços de argamassa com resistências entre 4MPa e 17MPa. O programa experimental abrange os seguintes ensaios de compressão: unidades, prismas e pequenas paredes. Foram confeccionados cinco prismas de duas e três fiadas sobrepostas e quatro pequenas paredes de dois blocos e meio por quatro fiadas de altura. Também foi obtido o módulo de elasticidade, tanto para as argamassas, blocos e prismas, quanto para as pequenas paredes. Entre as várias combinações ensaiadas, foi feito a análise de variância das amostras submetida à compressão. Com base na análise dos resultados, pode-se concluir que o bloco BPM é mais eficiente para o uso em alvenaria estrutural do que o BPV, quando se necessita um acréscimo na resistência da alvenaria, aumenta-se a resistência da argamassa, essa eficiência pode ser definida na relação da resistência dos prismas (dois e três blocos) e das pequenas paredes pela do bloco. As pequenas paredes construídas com blocos BPM apresentam uma significativa capacidade de absorver esforços, quando utilizada argamassa com resistência elevada (adotada nesse trabalho); quanto ao bloco BPV, essa diferença não foi tão expressiva. Sendo assim, a utilização de argamassa de assentamento com essas resistências pode potencializar a alvenaria de blocos cerâmicos, dependendo da geometria e das propriedades mecânicas dos blocos adotados.
Řehoř, David. "Hotel." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2015. http://www.nusl.cz/ntk/nusl-227321.
Full textSvatek, Michal. "Sportovní centrum Hodonín." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2018. http://www.nusl.cz/ntk/nusl-372089.
Full textPavel, Michal. "Sportovně relaxační centrum v Moravanech." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2017. http://www.nusl.cz/ntk/nusl-265453.
Full textNovák, Jan. "Dostavba a modernizace polikliniky Žamberk." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2019. http://www.nusl.cz/ntk/nusl-392009.
Full textSmutný, Květoslav. "Sportovní centrum." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2014. http://www.nusl.cz/ntk/nusl-226697.
Full textChoi, Keum-Ran. "3D thermal mapping of cone calorimeter specimen and development of a heat flux mapping procedure utilizing an infrared camera." Link to electronic thesis, 2005. http://www.wpi.edu/Pubs/ETD/Available/etd-020205-215634/.
Full textKeywords: temperature measurement; heat flux maps; Cone Calorimeter; three-dimensional heat conduction; fire growth models; retainer frame; ceramic fiberboard; edge effect; one-dimensional heat conduction; heat flux mapping procedure; infrared camera; specimen preparation; edge frame; one-dimensional heat conduction model; thermal properties. Includes bibliographical references (p.202-204).
Thomas, Gareth James. "Advanced materials for plasma facing components in fusion devices." Thesis, University of Oxford, 2009. http://ora.ox.ac.uk/objects/uuid:f8ba1ae1-f303-4c32-877e-dca421a3cb5c.
Full textTunková, Martina. "Městské lázně." Master's thesis, Vysoké učení technické v Brně. Fakulta architektury, 2010. http://www.nusl.cz/ntk/nusl-215713.
Full textChao, Chun-Cheng, and 趙俊誠. "Investigation on Heat Conduction of Building Wall Ceramic Tile." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/62077622941438671708.
Full text國立彰化師範大學
電機工程學系
100
In this thesis, the external wall tile of a building is classified into five factors, material properties, colors, thickness, water absorption rate and compressive resistance to be experimented. The impacts of these five factors on the external wall of buildings are analyzed to reduce the heat absorption and transmission to the indoor space and to provide references for green building designers. Also, it can reduce the consumption of air conditioning and carbon emission. By analyze the heat transmission quantity Q, the following conclusions are obtained: compared to the properties of tile, it can reduce 21% energy consumption; compared to the colors of tile, it can reduce 50% energy consumption; compared to the thickness of tile, it can reduce 21% energy consumption; compared to the water absorption of tile, it can reduce 7% energy consumption; compared to the compressive resistance of tile, it can reduce 12% energy consumption. Therefore, it is crucial to select exterior colors of wall tile and tiling location can reduce the energy consumption and carbon emission.
CHU-CHIEH, HSIAO, and 蕭巨杰. "Ceramic Wall Art- Home Living Space Series Hsiao Chu-Chieh." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/62177048423380313161.
Full text國立臺灣藝術大學
書畫藝術學系造型藝術碩士班
100
The occurrence of ceramic art, begins with the needs of human life. The rise of modern pottery, is a reflection of the spiritual level the role of public art of pottery wall and Japan as early as in 1956 at "Old Tokyo Metropolitan Government House" adopted, influence and stimulate the development of Japanese pottery wall, is the development of Japanese pottery wall porcelain history of an important stage, and another thinking is the construction of thinking change, that is, melt into pure works of art in the building. Of the induction process in the material, ceramics and architectural homogeneity, a high degree of plasticity and rich colors, the activation of the atmosphere of the building space, and trigger a psychological reaction to the role of environmental and visual, so this thesis, the environment and visual psychology, to explore the importance of pottery wall, through the induction of other famous works, together with its my 30 years of the Tao age experience, with different forms of production, common in the form of production of ceramic wall and personal concept of the creative integration of the reproduction of different style of art forms, to study and creation in one. Many professionals must focus on based develop of another and put forward the process of pottery making, production, to continue the technical aspects of the production of ceramic wall and to solve production problems arising from, so many potters who can dispense save the timing to solve the problem , and the pottery making process in lost and want to be able to enhance the artistic vision and taste.
Dzu-How, Yu, and 游子澔. "Embedding ceramic materials for fortifying the wall shell of self-healing microcapsules." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/7rpfv6.
Full text國立臺北科技大學
材料科學與工程研究所
104
It is known that the shells of microcapsules plays an important role in dispersibility, adhesion, and mechanical property. Characteristics of different shells may vary greatly owing to its component and formation. In this thesis, several kinds of robust microcapsules were prepared. By encapsulating Pickering emulsions, containing SiO2, TiO2, ZrO2 nanoparticles and two commercial phosphate dispersants, nanoparticles were embedded in the poly-urea-formaldehyde membrane, and enduing it tougher mechanical properties. Moreover, nanoindentation experiment was conducted to characterize failure strength, deformation, and Young’s modulus of this composite-shell. Finally, studies of Rheology, TGA, SEM, and thermodynamic module were induced to discuss the mechanism of robust microcapsules.
Li, Chen-Hsuan, and 李珍萱. "Construction site aesthetics Reflections on the production of a large-scale ceramic wall by Chen-Hsuan Li." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/72872158492398055380.
Full text國立臺北教育大學
藝術與造形設計學系碩士班
98
Life is the river of the memory, and memories are the expression of time. In the transcription of life into the memory, it starts to dance as time passes, becoming a splendid musical movement. The rippling and drip-dripping of life are recorded in phase after phase of the pondering of its course and meaning, with the eyes noting down the memory of the individual moments that flash by. Through my work I produced large scale ceramic wall pieces. In the course of making them I experienced the factory and the culture of the construction site. I came into contact with many people, which opened my eyes to something very different. From the factory and life on the construction site to the laboring class itself, from the production of ceramic walls to the different qualities of space, people and objects on the scaffolding, I have recorded each of these things and described them from a different perspective. The first chapter gives an account of the author’s background in creative work, motives and reflections on the fine art of the construction site. The second chapter describes the author’s experience of the factory, how the author truly experienced life in the area, advertising culture, the iron huts of the factory and the scaffolding of the construction site. The third chapter records the process of making a large-scale ceramic wall piece, from planning and design to production and installation, and the difficulties and analysis the author went through during the study of ceramic art and the production of moulds, and the author’s experience of labor and the construction site, and how she used photography to produce a record and artistic material .The fourth chapter describes the period spent working at the construction site, reflections on ceramics, and conclusions.
Amaro, João Pedro da Costa. "O tijolo cerâmico na arquitetura: concepção e estudo de paredes “filtro”." Master's thesis, 2016. http://hdl.handle.net/1822/42747.
Full textEste trabalho de investigação elabora um estudo acerca da utilização do tijolo cerâmico na arquitetura, destacando algumas potencialidades deste material. Questiona a forma como se concilia as características do material às necessidades funcionais de um edifício. Trata-se de um material construtivo com grande importância denotada desde sempre na construção. Dado que possui grande implementação e é amplamente caracterizado, o trabalho toma como premissa o estudo de formas inovadoras de o adequar à função de “filtro” em paredes. Numa altura em que o comportamento térmico deverá estar cada vez mais presente nas preocupações dos arquitetos, a essência do trabalho foca-se sobretudo na valorização funcional deste material, fortalecendo o seu vínculo com a eficiência energética na arquitetura. Pretende-se promover um novo uso para o tijolo cerâmico que tire partido das suas potencialidades. Assim, ambiciona-se a criação de uma parede “filtro” que perspetive promover um ambiente interior termicamente e luminicamente mais confortável, tendo em conta a incidência solar média em Portugal Continental. O conteúdo teórico da investigação foi elaborado a partir de pesquisa bibliográfica, bem como de documentos eletrónicos. A parte projetual foi realizada com base em modelos virtuais. Sempre que necessário recorreu-se ao contacto com profissionais para obter informação e ajuda na parte prática da investigação. Foi possível o contacto com um atelier de cerâmica artística e empresas de comercialização de materiais de construção. Foram estudados alguns dispositivos de parede “filtro”, sistematizando-se diferentes tipos de filtragens exploradas em arquitetura. Conceberam-se propostas de variantes de paredes “filtro” em tijolo, sendo estudados os sombreamentos gerados. A investigação permitiu comprovar que é possível explorar o tijolo cerâmico como “filtro” capaz de regular adequadamente o equilíbrio entre a radiação solar das estações quente e fria do ano. Passando o futuro da indústria cerâmica pela inovação, as propostas criadas vão de encontro às premissas do setor, ajudando na sua expansão pela valorização duma aplicação menos convencional do tijolo.
This research project is a study about the use of the ceramic brick in architecture, exploring the full potential of this material. It questions how we can conciliate the material characteristics and the functional needs of a building. It is a constructive material of great importance throughout history of construction, since it is widespread and has a lot of specific features, this work takes as premise the study of new methods of applying the “filtering” function in walls. In a time in which thermic characteristics of materials is a concern among architects, the essence of this investigation points mainly in the valorization of this material, considering mainly the energetic efficiency principles in architecture, so we looked forward in promoting a new use for the ceramic brick in which all it potential could be expressed. The objective was to create a “filter” wall which promotes a more comfortable environment, considering the average solar exposure of the continental territory of Portugal. All of the theoretical content of this investigation was done based on bibliographical research as well as online documents. The project was developed using 3D modeling software. Professionals and people with know-how in ceramic production were consulted during this research, specifically an artistic ceramic atelier as well as companies who are retailers of ceramic products and construction materials. During this research project several devices of “filter” walls were studied, resulting in different types of “filterings” explored in architecture. Several variants of “filter” brick walls were conceived, in which its consequent shadowings were studied. This research project proves that it is possible to consider the ceramic brick as a “filter”, capable of acting as a regulator to promote balance in solar exposure in all seasons of the year. Considering that innovation must be the future of ceramic industry, this work helps to promote and add value to this material, through a less conventional usage.
Shih, Cian-Lin, and 施千琳. "A Study on Fabrication Low Temperature Sintering Ceramics Wall Tiles using Geopolymer Technology." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/re8g57.
Full text國立臺北科技大學
資源工程研究所
103
Traditional methods of manufacturing tiles generally consist of four stages as following, raw material mixing, shaping, drying, sintering (including glazing). In addition, manufacturing tiles are produced at 1,000-1,200 °C. Nowadays due to increasingly severe global warming has become severely, taking energy conservation and reducing carbon footprint have become important issues. Therefore, if there is an approach to reduce the sintering temperature, which not only merely conserves energy and reduces carbon footprint, but also keep the producing cost down. Geopolymer is a newly-developed material which has a good early strength property, hardening at room temperature, heat insulation, good resistance to acids and bases, and durability advantages. This study applied geopolymer technology to the traditional tile manufacturing. Besides, the tiles should be pressed and sintering temperature below 500 °C, and the quality of tiles need to meet the CNS(Chinese National Standards). The result of this study indicates that the tiles are made by mullite, metakaolin, kaolin and alkali solution with molar ration of SiO2/K2O = 1.01, mixed with solid and liquid ratio 4, and under 540 kgf/cm2 pressure to produce. The tile reach 15.8 % of water absorption, 11.6 MPa of flexural strength and -0.1 mm of warping, after it is sintering at 500 °C for 2 hours, which all meet CNS for tiles. The life cycle assessment software SimaPro, compared the emission of carbon dioxide from the ceramic tiles produced with geopolymer technology and the store-bought ceramic tiles, this study found using geopolymer technology can reduce carbon emissions of 81% CO2eq.
(9187367), Keisuke Yazawa. "EFFECT OF GRAIN SIZE AND MECHANICAL STRESS ON POLARIZATION SWITCHING OF FERROELECTRICS." Thesis, 2020.
Find full textFirstly, the microscopic origin of ferroelastic switching suppression in smaller grains is discovered using a microscopic probing technique (piezoresponse force microscopy). It is demonstrated that there is no independent grain size effect on ferroelastic switching; the grain size affects the domain structure in a grain, and the domain structure plays an important role in the ferroelastic switching suppression. This result suggests that the grain size is not an independent critical parameter for the electromechanical property degradation in a grain < 1 m as the ferroelastic switching is a dominant component for the electromechanical property.
The study about the mechanical stress effects on the electric field induced polarization switching rationalizes the emergence of the electric field induced low-symmetry phases observed in tetragonal Pb(Zr,Ti)O3 and BaTiO3 ceramics after poling. It is demonstrated that a shear stress plays an important role in stabilizing the monoclinic phase in Pb(Zr,Ti)O3 whereas a normal stress along the polarization axis is a key for the monoclinic phase in BaTiO3 with a thermodynamic approach. It is suggested that the fraction of the low-symmetry phase, which is important for the large electromechanical property, can be engineered by applying an appropriate stress.
For the work about ferroelectric switching kinetics, the first direct Barkhausen noise associated with ferroelectric switching is measured. The domain switching time is quantified by the frequency of the Barkhausen noise. It is discovered that the dominant domain wall pinning site is grain boundaries based on the domain wall jump distance between pinning sites calculated from the switching time. This result suggests that the technique is a good tool for understanding the relationship between microstructure – domain wall kinetics.
In sum, the mechanisms of the polarization switching suppression due to domain structure and grain boundaries, and the emergence of the low symmetry phases due to stresses are revealed. These discoveries facilitate further improvements of the device performances with engineering the domain structure, grain boundaries and residual stress.
Att, Wael [Verfasser]. "Fracture resistance of molars restored with different types of ceramic partial coverage restorations : an in-vitro study / vorgelegt von Wael Att." 2003. http://d-nb.info/96941224X/34.
Full textLIN, Li-De, and 林禮德. "A Research on the Degradation of Ceramic Titles of External walls and the Establishment of the Evaluation Tools for Residential Collection." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/28mybq.
Full text國立臺北科技大學
建築與都市設計研究所
99
Ceramic tile is the most common material of the wall in Taiwan. The degradation of the ceramic titles were often heard recent years. As a precondition to protect and improve the safety of the environment. It was discuss about the degradation of ceramic titles outside the building which was built over thirty years might be dangerous in my research. To indentify the degradation of the wall and the standard of management and protection, Government has no straightforward orientation to it. Due to we will discuss how to improve the phenomenon we mentioned, so we chose the government housing in Taipei city. Through the characteristics of the large- scale of the government housing, by the year they was built and the kinds of the materials using on the wall to the survey. With collecting the literatures, discussing the management and mechanism of the external wall, site investigation and questionnaires of AHP expert to talk about the reason why degradation of the external wall will cause some safety problems. I summarized some impact factors and some focal points in order to put forward the evaluation to improve the degradation of external walls and the standard of the improvement. There are the summarizes for how to improve the safety problems that the degradation of external walls cause as follows, First, to confirm the safety problems of the degradation of external walls and see which affect the most. Via the site investigation and the collecting the literatures, the impact factors of the degradation of external walls include the form, the scope and the position. Due to those reasons, they caused some impact factors of the environment which include the environment of building sites, the location of buildings, the surrounding of buildings and configuration of building sites. Second, target validation. To apply formula to focus on the validation of the examination, there are 21 building standings get in third level in this examination project should be protected Immediately, and there are 37 building standings get in second level should be improved alloted time. Therefore, most of the building standings hidden many security issue in this examination project, should be improved Immediately. Third, environment security issue of the wall ceramic-tile degradation and checklist. Wall side ceramic-tile degradation formula: E(grade of ceramic-tile degradation)=B(grade of ceramic-tile degradation form type)+H(grade of the ceramic-tile degradation position)+R(grade of ceramic-tile degradation area) Environment security issue assessment formula of the wall side ceramic-tile degradation type affected : W(security assessment affected of the ceramic-tile degradation type)=E(grade of ceramic-tile degradation)+U(grade of the building location)+P(grade of the building periphery environment)+S(grade of the building site plan) 1. Dedicated checklist. To provide simple evaluation to check and find out the residential properties that making sure the external walls using in safe way in general housing. Additionally, to provide the checking from the institution to evaluate if the degradation of external walls would cause the safety problems with the dedicated checklists. This research focuses on the evaluation and classification of government housing in Taipei city in order to analyze if it should be improved and protected of government housing. To improve the security around the house for the main target, and put forward the consequence in this research of managing and improving the degradation of ceramic tiles outside the external walls as a reference. To built some rules to manage and put forward some situations about the degradation of ceramic tiles outside the external walls in other buildings.
DVOŘÁKOVÁ, Iveta. "Kouzlo psaného slova." Master's thesis, 2012. http://www.nusl.cz/ntk/nusl-112225.
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