复合稳定剂对钛酸铝陶瓷性能的影响  

The Influences of Composite Stabilizer on the Properties of Aluminum Titanate Ceramics

作　　者：桑月侠 刘维良[1] 郑乃章[1] 曾小军[1] 

机构地区：[1]景德镇陶瓷学院材料科学与工程学院,江西景德镇333001

出　　处：《中国陶瓷工业》2015年第2期14-16,共3页China Ceramic Industry

摘　　要：以氧化铝(α-A12O3)粉和氧化钛(TiO2)粉为主要原料,以ZrO2、ZnO、MgO、Y2O3、La2O3为稳定剂,摩尔比为1∶1∶1∶2∶2,采用固相反应法制备出钛酸铝陶瓷。研究了复合稳定剂对钛酸铝陶瓷抗弯强度、热稳定性和显微结构的影响。采用热膨胀系数测定仪、万能试验机、X射线衍射仪、扫描电镜等对样品性能进行了表征。实验结果表明,当复合稳定剂含量为25wt.%,烧成温度为1550℃,保温时间为3h时制备的钛酸铝陶瓷性能最佳。其热膨胀系数为0.86×10-6/℃,比无稳定剂的钛酸铝陶瓷降低了35.8%;抗弯强度为48.3MPa,比无稳定剂的钛酸铝陶瓷提高了36.9%。Low thermal expansion aluminum titanate ceramics were prepared by solid state reaction method. The method employed Al2O3 and TiO2 powders as raw materials, ZrO2, ZnO, MgO, Y2O3 and La2O3 as stabilizers. The mol ratio of ZrO2/ZnO/MgO/Y2O3/La2O3 was 1：1：1：2：2. The influences of composite stabilizer on flexural strength, thermal stability and microstructure of Al2TiO5 ceramic were studied. Samples were characterized by means of thermal expansion coefficient measuring instrument, tensile testing machine, X-ray diffraction and scanning electron microscope. The experimental results indicated that the properties of Al2TiO5 ceramic was best when the stabilizer content was 25wt% , the firing temperature was 1450℃ and the holding time was 3h. Al2TiO5 ceramic was 0.86×10.6℃ in thermal expansion coefficient,and decreased by 35.8%. Al2TiO5 ceramic was 48.3MPa in flexural strength, and increased by 36.9%.

关 键 词：钛酸铝 复合稳定剂 低热膨胀 

分 类 号：TQ174.1[化学工程—陶瓷工业]