微粉微晶玻璃的致密烧结与析晶  

Studying about Densification by Sintered and Crystallization of Tiny Powder Glass-Ceramics

作　　者：俞平利[1] 陈文水[1] 刘培德[1] 

机构地区：[1]华侨大学材料科学与工程学院,福建泉州362021

出　　处：《华侨大学学报（自然科学版）》2011年第1期53-57,共5页Journal of Huaqiao University(Natural Science)

基　　金：福建省自然科学基金资助项目(D0610014);华侨大学科研基金资助项目(08HZR02)

摘　　要：采用R2O-CaO-MgO-Al2O3-SiO2系统,制备微粉微晶玻璃.研究合理的烧结、析晶温度制度,以及升温速率、粉体粒度对玻璃析晶、显微结构的影响,探讨提高微晶玻璃的晶体质量分数和致密度、优化微晶玻璃显微结构的途径.结果表明,采用微粉制备辉石族矿物为主晶相微晶玻璃时,粉体的巨大表面积使微晶化进程变得更加容易,晶化处理时间大大缩短.此外,粉体颗粒度的减小,有利于微晶化的充分进行和微晶玻璃显微结构的致密化.Glass ceramics have been made from tiny glass powders of R2O-CaO-MgO-Al2O3-SiO2.Temperature-time schedule for sinter and crystallization was studyed.Influence of heating-up rate and particle size on the crystallization and microstructure of glass were investigated.Methods of increasing degree of densification and crystallization volume,and ways of improving microstructure of glass-ceramics were discussed.The results showed that during the process of making tiny glass powder into pyroxene glass-ceramics,huge surface area of powder brought about crystallization easily,which shorted the shorten crystallization time,and improved the microstructures of the glass-ceramics.

关 键 词：微粉微晶玻璃 致密烧结 析晶 升温速率 粉体粒度 

分 类 号：TQ171.733[化学工程—玻璃工业]