摘要
通过DTA ,XRD ,SEM等技术 ,对以TiO2 作为晶核剂的堇青石基微晶玻璃的晶化过程和力学性能进行了研究。对晶化过程中晶体类型、热处理工艺与力学性能之间的关系作了讨论。结果表明 :随温度升高 ,玻璃中依次析出镁铝钛酸盐、β-石英固溶体、假蓝宝石、尖晶石、α -堇青石、α -石英、方石英、顽辉石等晶体。材料力学性能取决于热处理工艺 ,经 85 0℃ ,2h和 12 0 0℃ ,2h处理后 ,所制备的玻璃具有良好的力学性能 ,其弯曲强度可稳定在 34
Crystallization process of cordierite glass ceramics containing TiO 2 as nucleating agent was studied by DTA, XRD, SEM techniques and the mechanical properties were tested as well. The relationships between crystalline types, heat treatment methods and mechanical properties were well discussed. The results show that with the increasing temperature magnesium aluminotitanate(MAT), β -quartz solid solution( β -QSS), sapphirine, spinel, α -cordierite, α -quartz, cristobalite, enstatite are precipitated in glass in sequence. Mechanical properties of this material mainly depend on heat treatment methods. When the glass is heated at 850 ℃ for 2 h and then at 1 200 ℃ for 2 h, excellent mechanical properties can be obtained and its flexural strength can reach to over 340 MPa steadily.
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
2003年第4期413-416,共4页
Journal of The Chinese Ceramic Society
关键词
二氧化钛
镁铝硅系微晶玻璃
晶化
力学性能
titanic oxide
magnesium aluminosilicate glass ceramics
crystallization
mechanical properties
