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发明授权
CN1724147B 钙钛矿型复合氧化物和催化剂 失效 - 权利终止 转让

钙钛矿型复合氧化物和催化剂
摘要：
本发明涉及向机动车排气净化催化剂的载体提供理想的在低温域具有高的催化剂活性的物质。由热重量测量，50～180℃下的重量减少对50～1000℃下的重量减少的比例为30％以上的、例如含有稀土类元素类的1种以上和过渡金属元素的1种以上的钙钛矿型复合氧化物。特别在结构式RTO3中，可优选采用R用稀土元素类的1种以上构成、T用过渡金属元素的1种以上构成的结构，或者R用稀土类元素的1种以上和从碱金属元素及碱土金属元素中选出的1种以上构成、T用过渡金属元素的1种以上构成的结构。在此，所谓“稀土类元素类”是指稀土类元素再加上Y的元素群。
摘要（英）：

A perovskite complex oxide is provided whose ratio of thermogravimetric weight decrease between 50 DEG C. and 180 DEG C. to thermogravimetric weight decrease between 50 DEG C. and 1000 DEG C. is not less than 30% and which contains, for example, one or more rare earth element species and one or more transition metal elements. Among perovskite complex oxides represented by structural formula RTO3, ones in which R is constituted by one or more rare earth element species and T is constituted by one or more transition metal elements, and ones in which R is constituted by one or more rare earth element species and one or more members selected from the group comprising alkali metal elements and alkali earth metal elements and T is constituted by one or more transition metal elements are excellent for use. A ''rare earth element species'' is defined as a member of the group of elements obtained by adding Y to the rare earth elements.

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