MnO2-TiO2-CaO-La2O3复相添加剂对低温烧结氧化铝陶瓷性能的影响

摘要

采用MnO2-TiO2-CaO-La2O3体系复相添加剂作为氧化铝陶瓷的烧结助剂,采用模压成型工艺,研究了不同的烧结温度对95氧化铝陶瓷性能的影响.采用XRD和SEM对氧化铝陶瓷试样的晶相组成和微观形貌进行了表征.结果表明,在1450℃烧结时,样品已基本烧结致密,样品的综合性能指标最佳,收缩率为28.5％,体积密度达到3.78 g·cm-3,抗弯强度达到357.12MPa,洛氏硬度值达到78.0.%The effects of different sintering temperatures on the properties of 95 alumina ceramics prepared by mould pressing, using MnO2TiO2CaO-Las=2O3 heterogeneous additive as sintering aids, were studied. Phase compositions and morphologies of alumina ceramic samples were characterized by XRD and SEM. The results show that the samples have almost been densely sintered and their composite properties are the best when sintered at 1450℃. The shrinkage is 28.5% and the bulk density is 3.78g.cm-3. The bending strength and Rockwell hardness reach 357.12MPa and 78.0 separately.