Title:
METHOD FOR SYNTHESIZING SiO2AL2O3-CONTAINING SOL SOLUTION, AND METHOD FOR FORMING POROUS ALUMINA FILM
Document Type and Number:
WIPO Patent Application WO/2023/182247
Kind Code:
A1
Abstract:
Provided is a method for synthesizing a sol solution for forming a porous alumina film having excellent adhesiveness to various substrate surfaces, high heat resistance and a high specific surface area. A SiO2Al2O3-containing sol solution is prepared by separately preparing an alkoxysilane solution and an aluminum solution in advance, precipitating a precipitate comprising a silicon compound adsorbed on aluminum hydroxide in a mixed solution of the alkoxysilane solution and the aluminum solution, washing the precipitate filtrated off from the mixed solution with water to produce a precipitate cake, adding water to the precipitate cake to prepare a slurry solution, and subjecting the slurry solution to a pH adjustment treatment and subsequently to an autoclave treatment. By the pH adjustment treatment of the slurry solution, the pH value of the slurry solution is controlled so as to fall within a specified pH range in which the solution state of the SiO2Al2O3-containing sol solution after the autoclave treatment becomes a sol state. The sol solution is suitable for forming a porous alumina film having excellent adhesiveness to various substrate surfaces, high heat resistance and a high specific surface area.
Inventors:
HASEGAWA AKIRA (JP)
OKADA OSAMU (JP)
NAKAMURA HIROMI (JP)
OGASAWARA SHIZUKA (JP)
OKADA OSAMU (JP)
NAKAMURA HIROMI (JP)
OGASAWARA SHIZUKA (JP)
Application Number:
PCT/JP2023/010790
Publication Date:
September 28, 2023
Filing Date:
March 20, 2023
Export Citation:
Assignee:
RENAISSANCE ENERGY RES CORP (JP)
NATIONAL INSTITUTE OF TECH (JP)
NATIONAL INSTITUTE OF TECH (JP)
International Classes:
C01F7/34; B01J32/00; C01F7/44
Domestic Patent References:
| WO2021192752A1 | 2021-09-30 | |||
| WO2012096386A1 | 2012-07-19 |
Foreign References:
| US5731261A | 1998-03-24 |
Attorney, Agent or Firm:
MASAKI Yoshifumi (JP)
Download PDF:
Previous Patent: BONDED SUBSTRATE
Next Patent: POWDERY BINDER FOR SECONDARY BATTERY POSITIVE ELECTRODE AND USE OF SAME
Next Patent: POWDERY BINDER FOR SECONDARY BATTERY POSITIVE ELECTRODE AND USE OF SAME