注凝成型制备莫来石–钛酸铝复相陶瓷(英文)

被引：2

作者：

陆洪彬 ^{[1
,2
]}

陈建华 ^{[3
]}

冯春霞 ^{[1
]}

焦宝祥 ^{[1
]}

孟祥康 ^{[2
]}

机构：

[1] 盐城工学院材料工程学院

[2] 南京大学材料科学与工程系固体微结构国家实验室

[3] 常熟理工学院江苏省新型功能材料实验室

来源：

硅酸盐学报 | 2009年 / 37卷 / 05期

关键词：

注凝成型; 钛酸铝; 莫来石; 热稳定性; 弯曲强度;

D O I：

10.14062/j.issn.0454-5648.2009.05.011

中图分类号：

TQ174.1 [基础理论];

学科分类号：

摘要：

引入10%(摩尔分数,相对于Al2O3,下同)MgO和15%SiO2双组分添加剂合成了钛酸铝粉体。采用不同质量比的钛酸铝粉体和工业莫来石,用干压和注凝成型工艺制备了莫来石-钛酸铝(mullite-aluminium titanate,MAT)复相陶瓷。用X射线衍射分析了双组分添加剂对钛酸铝相组成和热稳定性的影响,通过扫描电镜表征了MAT复相陶瓷的微结构。研究了钛酸铝含量对采用干压、注凝2种成型工艺制备的MAT复相陶瓷的弯曲强度和平均热膨胀系数(室温～1000℃)的影响。结果表明:MgO和SiO2双组分添加剂促进了钛酸铝的形成,增强了钛酸铝的热稳定性。通过注凝成型制备的MAT复相陶瓷比干压成型制备的MAT复相陶瓷具有更均匀的结构和更高的机械性能。当钛酸铝含量为10%(质量分数,下同),运用注凝成型工艺制备的MAT复相陶瓷的弯曲强度最大,达110.05MPa。

引用

页码：719 / 723

页数：5

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