水热盐溶液卸压法制备氧化物粉体

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．

Preparation of Oxide Powders by Hydrothermal Salt Solution Pressure-relief

α-Al₂O₃ powder, AlO(OH) fibers and complex oxides made up of ZrO₂ and AlO(OH) were prepared by a new hydrothermal method-hydrothermal salt solution pressure-relief. α-Al₂O₃ powders were prepared at 300℃ by using 1mol/L Al(NO₃)₃ solution as precursor, 0.2mol/L Fe(NO₃)₃ as additive; AlO(OH) fiber with the ratio of length with diameter 13:1 were prepared at 350℃ by using 1mol/LAl(NO₃)₃ as precursor, 1 mol/L KBr as additive; complex oxides made up of ZrO₂ and AlO(OH) were prepared at 240℃ by using 0.75mol/L AlCl₃ and 0.25mol/L ZrOCl₂ mixed solutions as precursor.