【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.更多还原

【Abstract】 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.更多还原