文档介绍：CaO对CaO-MgO-Al2O3-SiO2-Na2O系微晶玻璃析晶行为和性能的影响
张大勇王媛媛史培阳刘承军姜茂发
(东北大学材料与冶金学院沈阳 110004)
摘要利用DTA、SEM和XRD等测试手段,系统研究了CaO对CaO-MgO-Al2O3-SiO2-Na2O系微晶玻璃晶相组成、显微结构、晶粒尺寸和性能的影响。在本实验条件下,随着CaO含量的增加,微晶玻璃晶相由钙镁黄长石和透辉石逐渐转变为钙镁黄长石;%时,微晶玻璃的显微硬度达到最大,为802Hv;%时,其表观体积密度达到最大,·cm-3。
关键词微晶玻璃 CaO 析晶显微结构
Effects of CaO on Crystallization Behavior and Properties of Glass Ceramic in CaO-MgO-Al2O3-SiO2-Na2O System
Zhang Dayong, Wang Yuanyuan, Shi Peiyang, Liu Chengjun, Jiang Maofa
(School of Material and Metallurgy, Northeastern University, Shenyang, 110004)
ABSTRACT: The effects of CaO on crystal phase, microstructure, crystal grains size and properties of glass ceramic in CaO-MgO-Al2O3-SiO2-Na2O system are studied by DTA, SEM, XRD and so on. Under the experimental conditions, with increasing CaO content, crystal phase is changed from akermanite and diopside to akermanite; The mishardness is the maximum which is 802Hv when the CaO content is %; Apparent bulk density is the maximum which is ·cm-3 when the CaO content is %.
KEY WORDS: Glass Ceramic, CaO, Crystallization, Microstructure
1 引言
随着中国钢产量的逐年增加,冶金固体废弃物污染环境的问题越来越受到人们的关注。转炉渣排放量一般为粗钢产量的10%~15%[1],不仅占用大片土地,而且污染环境。转炉渣中含有制备微晶玻璃所需的主要成分,利用转炉渣制备微晶玻璃不仅可以节省资源,还可以减少转炉渣对环境的污染。目前利用转炉渣制备微晶玻璃的研究较少[2],由于转炉渣中CaO含量较高,很难直接利用其制备微晶玻璃。本文以转炉渣成分为基础,配制CaO-MgO-Al2O3-SiO2-Na2O系的微晶玻璃成分,探讨CaO对CaO-MgO-Al2O3-SiO2-Na2O系微晶玻璃晶体结构和性能的影响