摘要
针对CaO–Al_(2)O_(3)–SiO_(2)–Fe_(2)O_(3)(CASF)微晶玻璃晶核周围形成致密的硅氧、铝氧四面体网络结构,阻碍晶核连续长大的问题,利用XRD、NMR、FESEM分析了晶核长大过程,研究了CASF微晶玻璃晶核长大过程晶核周围玻璃网络结构演变机制。研究结果表明:玻璃网络修饰体Na^(+)/F^(-)协同破坏[SiO_(4)]/[AlO_(4)]玻璃网络结构,其中Na^(+)离子主要与[SiO_(4)]四面体网络结构发生解聚反应,Na^(+)离子剪切Si—O—Si的Si—O键,形成了Si—O—Na^(+)。F^(-)离子主要与[AlO_(4)]四面体网络结构发生解聚反应,F^(-)离子剪切Al—O—Al的Al—O键,形成了Al—F键。透辉石晶体可以生长到预期的尺寸,约为2 μm。
This study investigates the issue where dense silicon-oxygen and aluminum-oxygen tetrahedral networks formed around the crystal nuclei inhibit continuous growth in CaO–Al_(2)O_(3)–SiO_(2)–Fe_(2)O_(3)(CASF)glass-ceramics.The crystal nuclei growth process was analyzed using XRD,NMR,and FESEM,the evolution mechanism of the glass network structure surrounding growing nuclei in CASF glass-ceramics was investigated.The results showed that the glass network modifiers Na^(+)/F^(-)synergistically destroy the[SiO_(4)]/[AlO_(4)]glass network structure,in which Na^(+)mainly depolymerizes the[SiO_(4)]tetrahedral network structure through the Si-O bond of Si—O—Si to form Si—O—Na^(+);F^(-)preferentially depolymerizes the[AlO_(4)]tetrahedra network structure through the shear of the Al—O bond of Al—O—Al to form Al—F bond.The diopside crystals can grow to an expected size of approximately 2μm.
作者
缪燕平
陈鑫
MIAO Yanping;CHEN Xin(Jiangxi Technical College of Manufacturing,Nanchang 330000,China;Wuhan Business University,Wuhan 430000,China;Wuhan University of Technology,Wuhan 430000,China)
出处
《中国陶瓷》
北大核心
2025年第6期22-27,共6页
China Ceramics
基金
江西省教育厅科学技术重点研究项目(GJJ2207501)
湖北省自然科学基金项目(2023AFB395)。
关键词
微晶玻璃
协同作用
一步晶化
晶体连续生长
Glass-ceramics
Synergistic effect
One-step crystallization
Continuous crystal growth
