Process for producing a composition which includes

专利名称：Process for producing a composition which

includes perovskite compounds

发明人：Kazunobu Abe,Masashi Aoki,Hiroaki

Rikimaru,Takeshi Ito,Kazuhisa Hidaka,KayokoSegawa

申请号：US06/758072申请日：19850723公开号：US04643984A公开日：19870217

摘要：A process for producing a composition which includes a perovskite compound,the process comprising:

(a) subjecting a mixture of a hydroxide of at least one A group element selected fromthe group consisting of Mg, Ca, Sr, Ba, Pb and rare earth elements and a hydroxide of atleast one B group element selected from the group consisting of Ti, Zr, Hf and Sn, to thehydrothermal reaction in an aqueous reaction medium;

(b) adding an insolubilizing agent to the resultant reaction mixture to insolubilizewater-soluble compounds of the unreacted A group element dissolved in the aqueousmedium so as to adjust the ratio of the group A element to the group B element in aresulting composition to a desired A/B ratio; or< P>< P>(c) filtering, washing with waterand drying the resultant reaction mixture to provide a solid reaction product, dispersingthe reaction product in an aqueous medium to form a slurry, adding to the slurry a water-soluble compound of the A group element, and then adding to the slurry an

insolubilizing agent to insolubilize the water-soluble compound of the A group element

so as to adjust the ratio of the group A element to the group B element in a resultingcomposition to a desired A/B ratio; and

(d) filtering, washing and drying the resultant mixture to provide the compositionwhich includes the perovskite compound having the desired A/B ratio.

申请人：SAKAI CHEMICAL INDUSTRY CO., LTD.

代理机构：Wenderoth, Lind & Ponack

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