Preparation of Al2-xYxW3O12 powders by citrate sol-gel process |
| |
Authors: | ZHANG Hai-jun ZHANG Qing JIA Quan-li YE Guo-tian |
| |
Affiliation: | High Temperature Ceramics Institute, Zhengzhou University, Zhengzhou 450052, China |
| |
Abstract: | Al2-xYxW3O12 (x=0.2, 0.5, 0.8, 1.0, 1.2, 1.5, 1.7 and 2.0) powders were synthesized by citrate sol-gel process. The concentration of species in a citric solution for preparing Al2-xYxW3O12 powders was calculated. The powders were characterized by differential thermal analysis(DTA), thermogravimetry(TG), X-ray diffractometry(XRD) and scanning electron microscopy(SEM), respectively. No solid solution of Al2-xYxW3O12 is formed with x values varying from 0 to 2.0. The maximum solid solubility of Y2O33 in Al2W3O12 and Al2O33 in Y2W3O12 is less than 0.5. Y2W3O12 easily absorbs water in air and forms a composition of 2W3O12·3.2H20, and Al2W3O12 forms Al2W3O12·0.17H2O in the same condition. |
| |
Keywords: | Al2-xYxW3O12 citrate sol-gel preparation hydration |
本文献已被 维普 万方数据 等数据库收录! |
|