锆石
材料科学
方石英
烧结
摩尔比
陶瓷
微观结构
臼齿
结晶
相(物质)
锆
矿物学
分析化学(期刊)
化学工程
复合材料
冶金
催化作用
化学
地质学
色谱法
生物化学
石英
有机化学
工程类
古生物学
作者
Zhengdi Jiang,Tianheng Xiong,Zimei Bai,Dandan Zhao,Wenping Yang,Yun Peng,Hui Dan,Yi Ding,Tao Duan
标识
DOI:10.1016/j.jeurceramsoc.2020.05.043
摘要
Zircon (ZrSiO4) ceramics have been widely used in the field of radioactive waste immobilization and ceramics industry. However, preparation of zircon ceramics suffers from low yield due to the variable Si/Zr molar ratio. Herein, we reported preparation of xSiO2/ZrSiO4 (0 ≤ x ≤ 0.3) ceramics using SiO2 and ZrO2 as raw materials. The effects of Si/Zr molar ratio and sintering temperature on the phase formation, phase and microstructure evolutions were investigated. The results indicated that zircon formation efficiency increased with increasing Si/Zr molar ratio from 1 to 1.2, while decreased with increasing Si/Zr molar ratio from 1.2 to 1.3. The as-prepared ceramics with Si/Zr molar ratio of 1.1 and 1.2 were single zircon phase, while with Si/Zr molar ratio of 1 and 1.3 exhibited coexistence of zircon and cristobalite phases. The grain growth and compactness can be enhanced by increasing Si/Zr molar ratio. Furthermore, the relative densities increased with increasing Si/Zr molar ratio.
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