PROBLEM TO BE SOLVED: To provide a method of manufacturing metal oxide particles, produced by employing a sol-gel method, with particle diameter around the limit particle diameter by crushing.SOLUTION: The method of manufacturing metal oxide particles involves: the crushing and classifying step of crushing and classifying silica-based gel-state organic metal oxide produced by the sol-gel method to adjust the average particle diameter to be 4 to 8 &mum by supplying the organic metal oxide to the crushing chamber 1 of a crusher, which is equipped with a vertically cylindrical and upper part-opened crushing chamber 1 having gas blowing-out ports 9 and 13 in the bottom and an agitator 3 in the inside, a classifying chamber 29 connected to the opening of the crushing chamber 1 and equipped with a classifying rotor 25, and a product recovery tube 17 penetrating the classifying chamber 29 inside and outside and the firing step of firing the gel particles having been crushed and classified to manufacture metal oxide particles with an average particle diameter smaller than that of the gel particles after crushing and classifying.COPYRIGHT: (C)2010,JPO&INPIT【課題】ゾルゲル法を利用して作製され且つ粉砕限界粒径前後の粒径を有する金属酸化物粒子。【解決手段】ゾルゲル法により作製されたシリカ系ゲル状有機金属酸化物を、縦型筒状で上部が開口し、底部にガス吹き出し口9、13を有し、内部にアジテーター3を備えた粉砕室1と、粉砕室1の開口部に接続され且つ分級ローター25を備えた分級室29と、分級室29内外を貫通する製品回収管17とを備えた粉砕機の粉砕室1に供給し、平均粒径が4~8μmとなるように粉砕分級する粉砕・分級工程と、粉砕分級後のゲル粒子を焼成する焼成工程と、を経て、粉砕分級後のゲル粒子よりも平均粒径の小さい金属酸化物粒子を作製する金属酸化物粒子の製造方法。【選択図】図2
