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Title: Preparation of zirconia coatings by hydrolysis of zirconium alkoxide with hydrogen peroxide

Abstract

Zirconia has gained a great deal of attention because of its superior properties of mechanical strength, chemical resistance, and ionic conductivity. Zirconia coatings and thin films are receiving attention as tribological and thermal barrier coatings for engines, high-reflective coatings, solid electrolytes for fuel cells, oxygen sensors, etc. The sol-gel coating method has several advantages, such as low processing temperatures, homogeneity, control of micro-structure, and good productivity compared to chemical vapor deposition and physical vapor deposition. However, there are few reports concerning the preparation of zirconia coatings and thin films by the sol-gel method. Up to the present, zirconia coatings have been prepared from zirconium propoxide (not heated), zirconium tetrabutoxide modified by acetylacetone and ethyl acetoacetate, zirconium diethoxydichloride (ZrCl[sub 2](OC[sub 2]H[sub 5])[sub 2]), and a hydrosol prepared from a zirconium oxychloride solution. Coatings of 8.8-mol%-yttria-doped zirconia were fabricated using a transparent and spinnable sol prepared by hydrolysis of zirconium alkoxide with hydrogen peroxide and nitric acid. The sol gave a crack-free coating film consisting of fine grains. The crystalline phase was cubic after heating of 1,000 and 1,200 C and cubic and tetragonal at 1,350 C, with the coating being highly oriented in the (111) plane, especially at 1,000 C. Activationmore » energy of the coating films was higher than that of the bulk. Transmittance through a film thickness of about 0.3 [mu]m on each side was 75%.« less

Authors:
; ;  [1]
  1. Colloid Research Inst., Kitakyushu (Japan)
Publication Date:
OSTI Identifier:
5989636
Resource Type:
Journal Article
Journal Name:
Journal of the American Ceramic Society; (United States)
Additional Journal Information:
Journal Volume: 76:4; Journal ID: ISSN 0002-7820
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; 36 MATERIALS SCIENCE; ALKOXIDES; HYDROLYSIS; YTTRIUM OXIDES; CHEMICAL PREPARATION; ELECTRICAL PROPERTIES; OPTICAL PROPERTIES; ZIRCONIUM COMPOUNDS; ZIRCONIUM OXIDES; ACTIVATION ENERGY; ALUMINIUM OXIDES; COATINGS; DOPED MATERIALS; EXPERIMENTAL DATA; FLOWSHEETS; GRAIN SIZE; HYDROGEN PEROXIDE; NITRIC ACID; ALUMINIUM COMPOUNDS; CHALCOGENIDES; CHEMICAL REACTIONS; DATA; DECOMPOSITION; DIAGRAMS; ENERGY; HYDROGEN COMPOUNDS; INFORMATION; INORGANIC ACIDS; LYSIS; MATERIALS; MICROSTRUCTURE; NUMERICAL DATA; OXIDES; OXYGEN COMPOUNDS; PEROXIDES; PHYSICAL PROPERTIES; SIZE; SOLVOLYSIS; SYNTHESIS; TRANSITION ELEMENT COMPOUNDS; YTTRIUM COMPOUNDS; 400201* - Chemical & Physicochemical Properties; 360204 - Ceramics, Cermets, & Refractories- Physical Properties

Citation Formats

Sakurai, Chihiro, Fukui, Toshimi, and Okuyama, Masahiko. Preparation of zirconia coatings by hydrolysis of zirconium alkoxide with hydrogen peroxide. United States: N. p., 1993. Web. doi:10.1111/j.1151-2916.1993.tb05337.x.
Sakurai, Chihiro, Fukui, Toshimi, & Okuyama, Masahiko. Preparation of zirconia coatings by hydrolysis of zirconium alkoxide with hydrogen peroxide. United States. https://doi.org/10.1111/j.1151-2916.1993.tb05337.x
Sakurai, Chihiro, Fukui, Toshimi, and Okuyama, Masahiko. 1993. "Preparation of zirconia coatings by hydrolysis of zirconium alkoxide with hydrogen peroxide". United States. https://doi.org/10.1111/j.1151-2916.1993.tb05337.x.
@article{osti_5989636,
title = {Preparation of zirconia coatings by hydrolysis of zirconium alkoxide with hydrogen peroxide},
author = {Sakurai, Chihiro and Fukui, Toshimi and Okuyama, Masahiko},
abstractNote = {Zirconia has gained a great deal of attention because of its superior properties of mechanical strength, chemical resistance, and ionic conductivity. Zirconia coatings and thin films are receiving attention as tribological and thermal barrier coatings for engines, high-reflective coatings, solid electrolytes for fuel cells, oxygen sensors, etc. The sol-gel coating method has several advantages, such as low processing temperatures, homogeneity, control of micro-structure, and good productivity compared to chemical vapor deposition and physical vapor deposition. However, there are few reports concerning the preparation of zirconia coatings and thin films by the sol-gel method. Up to the present, zirconia coatings have been prepared from zirconium propoxide (not heated), zirconium tetrabutoxide modified by acetylacetone and ethyl acetoacetate, zirconium diethoxydichloride (ZrCl[sub 2](OC[sub 2]H[sub 5])[sub 2]), and a hydrosol prepared from a zirconium oxychloride solution. Coatings of 8.8-mol%-yttria-doped zirconia were fabricated using a transparent and spinnable sol prepared by hydrolysis of zirconium alkoxide with hydrogen peroxide and nitric acid. The sol gave a crack-free coating film consisting of fine grains. The crystalline phase was cubic after heating of 1,000 and 1,200 C and cubic and tetragonal at 1,350 C, with the coating being highly oriented in the (111) plane, especially at 1,000 C. Activation energy of the coating films was higher than that of the bulk. Transmittance through a film thickness of about 0.3 [mu]m on each side was 75%.},
doi = {10.1111/j.1151-2916.1993.tb05337.x},
url = {https://www.osti.gov/biblio/5989636}, journal = {Journal of the American Ceramic Society; (United States)},
issn = {0002-7820},
number = ,
volume = 76:4,
place = {United States},
year = {Thu Apr 01 00:00:00 EST 1993},
month = {Thu Apr 01 00:00:00 EST 1993}
}