对共沉淀法制备纳米LaAlO3粉体及烧结进行了初步研究.采用La(NO3)3与Al(NO3)3为原料,控制pH=9左右,在室温下完成共沉淀,前驱体经800℃/2h的条件下煅烧后可获得纳米LaAlO3粉体,粉体颗粒约50nm.无压烧结的结果表明,这种纳米LaAlO3粉体的烧结性能较好,通过选择适当的条件,在1500℃下烧结可获得密度达6.2g/cm3的LaAlO3材料.
Preparing process and sintering behavior of nano LaAlO3 powders were investigated. The coprecipitation method was applied to synthesize nano LaAlO3 powders. By using La(NO3)3 and Al(NO3)3 as raw materials and keeping pH≈9, the coprecipitation process can be finished at room temperature. Pure LaAlO3 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 LaAlO3 powders can be sintered at 1500℃ for 4h, and a high density of about 6.2g/cm3 reached.
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