MnO<sub>2</sub>-TiO<sub>2</sub>-MgO复相添加剂对氧化铝陶瓷烧结温度的影响

MnO₂-TiO₂-MgO复相添加剂对氧化铝陶瓷烧结温度的影响

摘要: 用注浆成型方法,通过加入MnO₂-TiO₂-MgO复相添加剂,在1300℃下获得了相对密度为95%的氧化铝陶瓷。研究了MnO₂-TiO₂-MgO复相添加剂对氧化铝陶瓷力学性能、显微结构的影响。通过比较在添加相同质量MnO₂、MgO的情况下,添加不同质量的TiO₂对氧化铝陶瓷烧结性能的影响。结果表明,该复相添加剂能有效降低氧化铝陶瓷的烧结温度,尤其Al₂O₃+0.5%MgO+3%MnO₂+3%TiO₂体系烧结效果最好,晶粒分布均匀,几乎无晶粒异常现象,平均粒径为1μm,烧结体密度达到3.78g/cm³。

Abstract: Alumina ceramics sintered at relatively low temperatures with dense and fine grains sufficient mechanical property is obtained.The effect of MnO₂-TiO₂-MgO additives on mechanical property and microstructure of the alumina ceramics was investigated.The results show that with 3%MnO₂,3%TiO₂ and 0.5% MgO,the sintering of alumina ceramics at low temperatures is optimized and the dimension of grains distributes uniformly.