作　　者： ; ; ; ; ; ;

机构地区： 深圳大学化学与化工学院

出　　处： 《深圳大学学报（理工版）》 2007年第3期299-304,共6页

摘　　要： 利用X射线衍射和扫描电镜研究MgO-Al2O3-SiO2系统微晶玻璃的晶化行为．结果表明，TiO2质量分数少于6％的玻璃，最先析出的是μ-堇青石，最终主晶相是α-堇青石，玻璃为表面析晶．TiO2质量分数为6％的玻璃，最先析出的是镁铝钛酸盐（MAT），最终主晶相是α-堇青石，玻璃为整体析晶．在950℃时开始检测到含锆相，在950～1100℃范围内表现为ZrO2／TiO2固溶体形式．X射线衍射没有检测到其他含锆相．晶核剂TiO2和ZrO2是通过分相而影响玻璃晶化的，但ZrO2促进分相的能力略低于TiO2． The crystallization behaviors of MgO-Al2O3-SiO2 glass-ceramics were investigated by the method of X-ray diffraction （XRD） and scanning electron microscopy （SEM）. Results show that when the addition of TiO2 was less than 6%, the primary crystalline phase was μ-cordierite and the final major phase was α-cordierite, glass began to crystallize from the surface. When the addition of TiO2 was 6%, the primary crystalline phase was magnesium aluminum titanate and the final major phase was α-cordierite, glass was bulk crystallization. The phase containing zirconium was detected first at 950℃. ZrO2 was in the form of Zr/Ti solid solution during 950 - 1 000℃ in glass-ceramic and XRD did not detect other forms of zirconium.

关 键 词： 系统玻璃 晶核剂 晶化行为

领　　域： [化学工程] [化学工程]