Crystallization and sintering characteristics of CaO-Al2O3-SiO2 glasses in the presence of TiO2, CaF2 and ZrO2
Crystallization and sintering characteristics of CaO-Al2O3-SiO2 glasses in the presence of TiO2, CaF2 and ZrO2
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DOI：
10.1016/j.tca.2008.12.031
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发表时间：
2009-05-05
影响因子：
3.5
通讯作者：
Marghussian, V. K.
中科院分区：
文献类型：
--
作者：
Banijamali, S.;Yekta, B. Eftekhari;Marghussian, V. K.
本研究采用差热分析(DTA)、X射线衍射仪(X射线衍射仪)、扫描电子显微镜(SEM)、力学性能和耐化学性测试等手段，研究了不同含量的TiO2、ZrO2和CaF2晶核剂对CaO-Al_2O_3-SiO_2系微晶玻璃的烧结性、晶化性能、力学性能和耐化学性的影响。结果表明，在含CaF2的样品中，随着CaF2含量的增加，材料的烧结性、结晶性和力学性能均有所提高。金额。然而，添加氧化锆和二氧化钛提高了样品完全致密化所需的烧成温度。我们的实验表明，烧结过程中残留玻璃相化学成分的波动是导致这些不同趋势的原因，并对机械和化学性能产生了很大影响。根据所获得的结果，具有合适的烧结性、可接受的力学性能和化学性能。此外，最有希望的样品具有理想的白度，这使它们成为地板应用的合适选择。全烧成微晶玻璃的主要析晶相为硅灰石、钙长石和硅酸铝钙。(C)2009爱思唯尔B.V.保留所有权利。
In this study, the effects of different amounts of TiO2, ZrO2 and CaF2 nucleating agents on sinterability, crystallization, mechanical properties and chemical resistance of glass-ceramics belonging to the CaO-Al2O3-SiO2 system were investigated, using differential thermal analysis (DTA), X-ray diffractometry (XRD), scanning electron microscopy (SEM), mechanical and chemical resistance measurements. It was found that in CaF2 containing samples, the sinterability, crystallization and mechanical properties were improved by increasing of CaF2. amount. However, addition of ZrO2 and TiO2 increases the firing temperature required for complete densification of specimens. Our experiments showed that fluctuations of chemical composition of the residual glass phases during sintering were responsible for these dissimilar trends and greatly influenced mechanical and chemical properties. According to the obtained results, appropriate sinterability, acceptable mechanical and chemical properties. as well as desirable whiteness of the most promising specimens make them suitable choices for floor the applications. The main crystallization phases in all fully sintered glass-ceramics were wollastonite, anorthite and calcium aluminum silicate. (C) 2009 Elsevier B.V. All rights reserved.