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    • 6. 发明专利
    • Ceria-zirconia composite oxide material and production method thereof
    • CERIA-ZIRCONIA复合氧化物材料及其生产方法
    • JP2014105132A
    • 2014-06-09
    • JP2012259928
    • 2012-11-28
    • Japan Fine Ceramics Center一般財団法人ファインセラミックスセンターToyota Motor Corpトヨタ自動車株式会社
    • TAKAHASHI SEIJIOKAWA HAJIMEUEDA TARONAGAO SATOSHIMINAMI MITSURUMATSUMOTO SHINICHIHIRATA HIROTO
    • C01G25/00
    • PROBLEM TO BE SOLVED: To provide a method for producing more practical ceria-zirconia composite oxide material.SOLUTION: According to the method, a water-in-oil type emulsion in which ceria raw material and zirconia raw material are contained in the water droplets, is formed; a neutralizer is added to the water-in-oil type emulsion to obtain cerium-zirconium hydroxide particles, which are then calcinated under a reductive atmosphere to obtain a first calcinated body comprising ceria-zirconia composite oxide and carbide; the first calcinated body is calcinated under an oxidative atmosphere to remove the carbide in the first calcinated body and obtain a second calcinated body; and heat the raw material liquid that contains water, a hydroxy group containing compound comprising at least two hydroxy groups, and the second calcinated body, and that is alkaline, to separate particles of ceria-zirconia composite oxide having pyrochlore phase from the second calcinated body.
    • 要解决的问题:提供一种制造更实用的氧化铈 - 氧化锆复合氧化物材料的方法。溶液:根据该方法,在水滴中含有二氧化铈原料和氧化锆原料的油包水型乳液 , 形成了; 向油包水型乳液中加入中和剂,得到铈 - 氢氧化锆粒子,然后在还原气氛下煅烧,得到含有二氧化铈 - 氧化锆复合氧化物和碳化物的第一煅烧体; 将第一煅烧体在氧化气氛下煅烧,除去第一煅烧体中的碳化物,得到第二煅烧体; 加热含有水的原料液,含有至少两个羟基的含羟基化合物和第二煅烧体,并且是碱性的,从具有烧绿石相的二氧化铈 - 氧化锆复合氧化物颗粒与第二煅烧体分离 。