Preparing Process and Sintering Behavior of Nano LaAlO_3 Powders

Preparing process and sintering behavior of nano LaAlO_3 powders were investigated. The coprecipitation method was applied to synthesize nano LaAlO_3 powders. By using La(NO_3)_3 and Al(NO_3)_3 as raw materials and keeping pH≈9, the coprecipitation process can be finished at room temperature. Pure LaAlO_3 nano powders with a size of about 50nm can be obtained after calcining at 800℃ for 2h. After dry pressing with a pressure of 300MPa, the nano LaAlO_3 powders can be sintered at 1500℃ for 4h, and a high density of about 6.2g/cm~3 reached.