Title:
ペロブスカイト型複合酸化物の製造方法
Document Type and Number:
Japanese Patent JP6854477
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a method that produces a perovskite composite oxide having a particulate form without performing calcination.SOLUTION: The present invention provides a method for producing a perovskite composite oxide. In the method, a raw material aqueous solution containing a metal ion raw material with pH of 5 to 11.5 is heated at a temperature of 425°C to 650°C while pressurized at a pressure of 22 MPa to 60 MPa to place the solution at a supercritical state. The raw material aqueous solution at this state undergoes a hydrothermal treatment. As a result, a perovskite composite oxide is produced which is represented by the chemical formula ABO, where the A site includes La, the B site includes at least one kind of ion selected from the group consisting of Fe, Al, Mn, Ni, Co, Pd, Pt, Sc, Ti, Nb, Ta, W and Mo. The raw material aqueous solution preferably has pH of 6 to 11. The reaction preferably includes a reaction intermediate which is lanthanum oxyhydroxide (LaOOH).SELECTED DRAWING: Figure 1
Inventors:
Nohyuki Abe
Iwao Sato
Masafumi Ajiri
Tsutomu Aida
Iwao Sato
Masafumi Ajiri
Tsutomu Aida
Application Number:
JP2016251696A
Publication Date:
April 07, 2021
Filing Date:
December 26, 2016
Export Citation:
Assignee:
Sumitomo Metal Mining Co., Ltd.
Tohoku University
Tohoku University
International Classes:
C01G49/00; C01F17/34; C01G45/12; C01G53/00
Domestic Patent References:
| JP2009221044A | ||||
| JP2016164100A | ||||
| JP2013060356A | ||||
| JP2012180269A | ||||
| JP2008289985A |
Other References:
Journal of Materials Science,2006年,Vol. 41,pp. 1385-1390
Applied Catalysis B: Environmental,2012年,Vol. 126,pp. 231-238
窯業協會誌,1982年,Vol, 90, No. 1045,pp. 521-527
Applied Catalysis B: Environmental,2012年,Vol. 126,pp. 231-238
窯業協會誌,1982年,Vol, 90, No. 1045,pp. 521-527
Attorney, Agent or Firm:
Masayuki Masabayashi
Hayashi Ichiyoshi
Hayashi Ichiyoshi