MgO／SiO2添加剂对钛酸铝陶瓷性能的影响  

Effect of magnesia and silica additives on properties of aluminium titanate ceramic

作　　者：陆洪彬[1] 陈建华[2] 冯春霞[1] 李文丹[3] 焦宝祥[1] 

机构地区：[1]盐城工学院材料工程学院,江苏盐城224003 [2]常熟理工学院江苏省新型功能材料重点实验室,江苏常熟215500 [3]南京工业大学材料科学与工程学院,江苏南京210009

出　　处：《兵器材料科学与工程》2008年第3期26-30,共5页Ordnance Material Science and Engineering

基　　金：江苏省自然科学基金资助(资助号:BK2002044);江苏省生态环境材料重点实验室开放基金资助(资助号:XKY2006014)

摘　　要：利用二次烧成工艺研究添加剂MgO、SiO2对抑制钛酸铝热分解的作用及其机理。研究结果表明,MgO和SiO2复合添加剂可以显著提高钛酸铝的热稳定性和抗弯强度,添加10%MgO(摩尔分数)和15%SiO2(摩尔分数)所制备的钛酸铝陶瓷的抗弯强度为50.07MPa,平均热膨胀系数仅为0.2×10-6/℃(RT～1000℃),在1100℃下保温50h不分解,保温150h其分解量也仅为9.5%。Effects and mechanisms of magnesia and silica additives on restraining thermal decomposition of aluminium titanate were studied by double-firing process. The results show that stability and flexural strength can be remarkably improved by adding composite additives of magnesia and silica. The flexural strength of the aluminium titanate prepared by adding 10 mol% magnesia and 15 mol% silica increases by 56% and the average thermal expansion coefficient is only 0.2×10^-6/℃ （RT～1 000℃ ）. And when holding at 1 100 ℃ for 50 h, the aluminium titanate has no decomposition, even holding for 150 h, the decomposition ratio is only 9.5%.

关 键 词：材料学 热稳定性 二次烧成 MgO/SiO2添加剂 钛酸铝 抗弯强度 

分 类 号：TQ174.75[化学工程—陶瓷工业]