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本文采用一种新的水热粉体制备方法-水热盐溶液卸压法，制得了α-Al2O3粉体、AlO（OH）纤维以及ZrO2和AlO（OH）复合氧化物粉体．发现以1mol／LAl（NO3）3溶液作为前驱物，0．2mol／LFe（NO3）3为添加剂，在300℃可制得α－Al2O3粉体．以1mol／LAl（NO3）3溶液为前驱物；1mol／LKBr为添加剂，在350℃可制得长径比为13：1的AlO（OH）纤维．当采用AlCl3、ZrOCl2溶液为前驱物，Zr/Al的比例为1：3时，在240℃可制得纤维状AlO(OH)颗粒和球形ZrO2颗粒的复合氧化物粉体．
In this paper, α-Al2O3 powder, AlO (OH) fiber and ZrO2 and AlO (OH) composite oxide powder were prepared by a new hydrothermal powder preparation method - hydrothermal salt solution pressure-relief method. It was found that α-Al2O3 powder was obtained at 300 ℃ with 0.2mol / L Fe (NO3) 3 as the additive and 1mol / LAl (NO3) 3 solution as the precursor. With 1mol / LAl (NO3) 3 solution as precursor, 1mol / L KBr as additive, AlO (OH) fibers with aspect ratio of 13: 1 can be obtained at 350 ℃. When using AlCl3 and ZrOCl2 as precursors and Zr / Al ratio of 1: 3, a composite oxide powder of fibrous AlO (OH) particles and spherical ZrO2 particles can be obtained at 240 ° C.