Method for producing oxygen sensor

Patent metadata

Field	Value
Publication number	US-2017160225-A1
Application number	US-201615384485-A
Country	US
Kind code	A1
Filing date	Dec 20, 2016
Priority date	Mar 31, 2010
Publication date	Jun 8, 2017
Grant date	—

Abstract

A production method for producing an oxygen sensor, includes spinning a precursor consisting of a salt of at least one metal chosen from Sc, Y, La, Ce, Pr, Nd, Sm, Gd, Dy, Ho, Yb, Sr, Ba, Mn, Co, Mg, and Ga, a solvent, and a macromolecular polymer to produce nanofibers of the precursor containing the salt of the metal. The method further includes calcining the nanofibers of the precursor at a temperature ranging from 550° C. to 650° C. for 2 to 4 hours, and making a solid electrolyte material composed of the nanofibers obtained from the calcining. The resulting solid electrolyte material constitutes a part of the oxygen sensor.

First claim

1 .- 8 . (canceled)

9 . A method for producing an oxygen sensor, the method comprising:
spinning a compound precursor consisting of a salt of at least one metal selected from Sc, Y, La, Ce, Pr, Nd, Sm, Gd, Dy, Ho, Yb, Sr, Ba, Mn, Co, Mg and Ga, a solvent, and a macromolecular polymer to produce nanofibers of the precursor containing the salt of the metal; calcining the nanofibers of the precursor containing the salt of the metal at a temperature ranging from 550° C. to 650° C. for 2 to 4 hours, to obtain nanofibers of metal oxide containing the at least one metal, making a solid electrolyte material composed of the nanofibers obtained from the calcining, and producing a part of the oxygen sensor from the solid electrolyte material.

10 . The method according to claim 9 , wherein the metal oxide is a metal oxide of at least one metal chosen from Sc, Y, La, Ce, Pr, Nd, Sm, and Gd.

11 . The method according to claim 9 , wherein the nanofibers of the precursor containing the salt of the metal are prepared by electrospinning or liquid phase spinning method.

12 . The method according to claim 9 , wherein the metal oxide is a metal oxide of at least two metal elements chosen from Sc, Y, La, Ce, Pr, Nd, Sm, Gd, Dy, Ho, Yb, Sr, Ba, Mn, Co, Mg and Ga.

13 . The method according to claim 9 , wherein a concentration of the macromolecular polymer is 5 mass % to 15 mass % with respect to a total mass of the precursor.

14 . The method according to claim 9 , wherein the nanofibers are composed of metal oxide crystal with a three-dimensional structure, and in the nanofibers, adjacent metal oxide crystal grains connect to have a grain boundary network structure.

15 . The method according to claim 9 , wherein an average molecular weight of the macromolecular polymer ranges from 1,000 to 100,000.

Assignees

• Pan Wei
• Li Bin
• Liu Yanyi
• Kawai Masashi
• Toyota Motor Co Ltd
• Univ Tsinghua

Inventors

• Pan Wei
• Li Bin
• Liu Yanyi
• Kawai Masashi

Classifications

• C01F17/32

  oxide or hydroxide being the only anion, e.g. NaCeO2 or MgxCayEuO · CPC title

• C04B2235/3248

  Zirconates or hafnates, e.g. zircon · CPC title

• G01N27/4073 Primary

  Composition or fabrication of the solid electrolyte · CPC title

• C01P2004/10

  extending in one dimension, e.g. needle-like · CPC title

• D01F9/10

  by decomposition of organic substances (D01F9/12 takes precedence) · CPC title