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Method for producing perovskite metal oxynitride

Foreign code F170009052
File No. J1014-14WO
Posted date Apr 26, 2017
Country United States of America
Application number 201515125469
Gazette No. 20170073229
Gazette No. 9776866
Date of filing Jan 9, 2015
Gazette Date Mar 16, 2017
Gazette Date Oct 3, 2017
International application number JP2015050543
International publication number WO2015136953
Date of international filing Jan 9, 2015
Date of international publication Sep 17, 2015
Priority data
  • P2014-050740 (Mar 13, 2014) JP
  • 2015WO-JP50543 (Jan 9, 2015) WO
Title Method for producing perovskite metal oxynitride
Abstract (US9776866)
The method for producing a perovskite metal oxynitride of the present invention, comprises: a hydrogenation step (A) of forming a perovskite oxyhydride in which an oxide ion (O2-) and a hydride ion (H-) coexist, by reducing a perovskite oxide through a reductive oxygen elimination reaction using a metal hydride; and a nitriding step (B) of forming a perovskite oxynitride containing a nitride ion (N3-) by heat-treating the perovskite oxyhydride in the presence of a nitrogen source substance at a temperature of 300° C. or higher and 600° C. or lower and exchanging the hydride ion (H-) for a nitride ion (N3-).
Scope of claims [claim1]
1. A method for producing a perovskite metal oxynitride, comprising: a hydrogenation step (A) of forming a perovskite oxyhydride in which an oxide ion (O2-) and a hydride ion (H-) coexist, by reducing a perovskite oxide through a reductive oxygen elimination reaction using a metal hydride; and
a nitriding step (B) of forming a perovskite oxynitride containing a nitride ion (N3-) by heat-treating the perovskite oxyhydride in the presence of a nitrogen source substance at a temperature of 300 deg. C. or higher and 600 deg. C. or lower and exchanging the hydride ion (H-) for a nitride ion (N3-).
[claim2]
2. The method for producing a perovskite metal oxynitride according to claim 1 wherein the nitrogen source substance in the nitriding step (B) is an ammonia gas flow.
[claim3]
3. The method for producing a perovskite metal oxynitride according to claim 1 wherein the nitrogen source substance in the nitriding step (B) is an ammonia gas-generating agent.
[claim4]
4. The method for producing a perovskite metal oxynitride according to claim 1 wherein the nitrogen source substance in the nitriding step (B) is a nitrogen gas flow.
[claim5]
5. The method for producing a perovskite metal oxynitride according to claim 1 wherein the perovskite oxide is a compound represented by the formula An+1BnO3n+1 (in the formula, n is any one of 1, 2, 3 and infin , A is at least one of Ca, Ba, Sr, Pb and Mg, and B is at least one of Co, W, Mo, V, Ta, Zr, Nb, Ti and Hf), and the perovskite oxyhydride is a compound represented by the formula An+1Bn(O1-xHx)3n+1 (in the formula, A and B are the same as those of the starting substance, H is a hydride ion (H-) which has substituted an oxide ion, 0.01 <= x <= 0.2, and n is any one of 1, 2, 3 and infin ).
[claim6]
6. The method for producing a perovskite metal oxynitride according to claim 1 wherein the forms of the perovskite oxide, the perovskite oxyhydride and the perovskite metal oxynitride are powder or a thin film.
  • Inventor, and Inventor/Applicant
  • KAGEYAMA HIROSHI
  • KOBAYASHI YOJI
  • AIZU KOHEI
  • YOSHIMUNE WATARU
  • HOSONO HIDEO
  • JAPAN SCIENCE AND TECHNOLOGY AGENCY
IPC(International Patent Classification)
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