Gel-derived amorphous cesium-aluminosilicate powders useful for formation of pollucite glass-ceramics
Gel-derived amorphous cesium-aluminosilicate powders useful for formation of pollucite glass-ceramics
复制标题
可用于形成铯榴石玻璃陶瓷的凝胶衍生的无定形铯铝硅酸盐粉末
DOI：
10.1557/jmr.1991.0217
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发表时间：
1991
影响因子：
2.7
通讯作者：
S. Risbud
中科院分区：
文献类型：
--
作者：
M. Hogan;S. Risbud
采用溶胶-凝胶法制备了Cs_2 O-Al_2 O_3-SiO_2系统的非晶粉末。由TEOS、Al螯合物和Cs-acetate制成的凝胶经干燥和煅烧后得到分子混合粉末，其分析组成在可用于转化为铯榴石（CsAlSi_2O_6）玻璃陶瓷的范围内。采用X射线衍射（XRD）、差热分析（DTA）、热重分析（TG）和扫描电镜（SEM）对粉体进行了表征。分析化学组成的典型无定形粉末（重量%）= 28.05Cs_2O，37.77SiO_2和37.96Al_2O_3的玻璃化转变温度为945 °C，玻璃晶化温度为1026 °C。致密化和结晶的非晶粉末的初步实验结果表明，铯榴石/莫来石相存在。
Amorphous powders in the Cs_2O–Al_2O_3−SiO_2 system were prepared by sol-gel processing. Gels made from TEOS, Al-chelate, and Cs-acetate were dried and calcined to obtain molecularly mixed powders of analyzed compositions in the range useful for conversion to pollucite (CsAlSi_2O_6) glass-ceramics. X-ray diffraction (XRD), differential thermal analysis (DTA), thermogravimetry (TG), and scanning electron microscopy (SEM) were used to characterize the powders. A typical amorphous powder of analyzed chemical composition (in wt.%) = 28.05Cs_2O, 37.77SiO_2, and 37.96Al_2O_3 was found to have a glass transition temperature of 945 °C and a glass crystallization temperature of 1026 °C. Preliminary experimental results of densification and crystallization of the amorphous powders show pollucite/mullite phases to be present.