Secondary Grain Growth of Li2O‐A12O3‐SiO2‐TiO2 Glass‐Ceramics
Secondary Grain Growth of Li2O‐A12O3‐SiO2‐TiO2 Glass‐Ceramics
复制标题
Li2O-A12O3-SiO2-TiO2 微晶玻璃的二次晶粒生长
DOI：
10.1111/j.1151-2916.1969.tb09175.x
复制
发表时间：
1969
期刊：
影响因子：
--
通讯作者：
C. K. Chyung
中科院分区：
文献类型：
--
作者：
C. K. Chyung
研究了以Ti 〇 2为晶核剂的β-锂辉石固溶体微晶玻璃的二次晶粒长大动力学。颗粒的热稳定性优异。晶粒生长遵循时间的立方根规律。晶界迁移的活化能为55 ± 10 kcal/mol。仔细检查了由于TiO 2沉淀和残余玻璃相引起的晶粒生长抑制。晶粒的优异热稳定性是由于残余玻璃相而不是金红石沉淀物抑制晶粒生长。有人建议，扩散的A2+，并可能同时扩散的Li+，通过残留的玻璃是晶界迁移的限速过程。
The kinetics of secondary grain growth in a Ti02-nucleated β-spodumene solid-solution glass-ceramic was studied. The thermal stability of the grains was excellent. Grain growth followed the cube-root-of-time law. The activation energy of the grain boundary migration was 55 ± 10 kcal/mol. Grain growth inhibition due to Ti02 precipitates and the residual glassy phase was closely examined. The excellent thermal stability of the grains is due to grain growth inhibition by the residual glassy phase, not by rutile precipitates. It is suggested that the diffusion of A2+, and probably the simultaneous diffusion of Li+, through the residual glass is the rate-limiting process for the grain boundary migration.