Li 2 O·Al 2 O 3 ·4SiO 2 -Ta 2 O 5 系微晶玻璃分相与析晶机理研究
Source abstract
Abstract
采用Ta 2 O 5 为晶核剂制备Li 2 O·Al 2 O 3 ·4SiO 2 -Ta 2 O 5 微晶玻璃, 并研究其分相、析晶机理, 构建晶化模型. 结果表明Ta 2 O 5 能有效促进玻璃的体积析晶, 获得了晶粒尺寸为50nm的精细组织. 非等温动力学计算显示随Ta 2 O 5 含量增加, 析晶活化能降低, 析晶指数增加, 析晶动力学参数K( T p )作为析晶判据更为合理. 研究发现, LAST玻璃冷却时因亚稳分解导致互锁分相, 形核前期又借助成核生长机制发生微滴分相, 晶体生长则在继承亚稳分相形貌基础上发生“他形”析晶. 最终构建了LAST微晶玻璃的晶化模型.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Thermal and Kinetic Analysis · Pigment Synthesis and Properties · Glass properties and applications
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