硅酸盐学报2009，Vol.37Issue(5)：719-723,5.
注凝成型制备莫来石-钛酸铝复相陶瓷
PREPARATION OF MULLITE-ALUMINIUM TITANATE CERAMIC COMPOSITES VIA GELCASTING
摘要
Abstract
The mullite-aluminium titanate (MAT) ceramic composites were prepared via the gelcasting or dry pressing processes us- ing industrial mullite and aluminium titanate (Al2TiO5) powders with different mass ratios, that titanate was synthesized by doping the bi-component additive of 10% (in mole, the same below) MgO and 15% SiO2 relative to Al2O3. Effects of the bi-component additive on the phase composition and thermal stabilization of aluminium titanate powder were analyzed by X-ray diffraction and the micro- structures of MAT ceramic composites were characterized by scanning electron microscopy. The effects of aluminium titanate content on the bending strength and average thermal expansion coefficient (room temperature-1000 ℃) of the MAT ceramic composites pre- pared by dry pressing or gelcasting shaping processes were also investigated. The results show that the bi-component additive of MgO and SiO2 can promote the formation of Al2TiO5 and enhance its thermal stabilization. The MAT ceramic composites prepared by gel- casting process obtain more homogenous structure and higher bending strength than that prepared by dry pressing process. The MAT ceramic composite prepared by gelcasting process and containing 10% (mass fraction) Al2TiO5 has the maximum bending strength of 110.05 MPa.关键词
注凝成型/钛酸铝/莫来石/热稳定性/弯曲强度Key words
gelcasting/aluminium titanate/mullite/thermal stabilization/bending strength分类
化学化工引用本文复制引用
陆洪彬,陈建华,冯春霞,焦宝祥,孟祥康..注凝成型制备莫来石-钛酸铝复相陶瓷[J].硅酸盐学报,2009,37(5):719-723,5.基金项目
江苏省自然科学基金资助项目(BK2002044) （BK2002044）
江苏省生态环境材料重点实验室开放基金(XKY2008058)资助项目. （XKY2008058）
