Electrophoretic Bubble-Free Deposition on Anodes from Aqueous Alumina and Zirconia Suspensions with Hydroquinone: Fabrication of Alumina/Zirconia Gradiented Composites

Osamu SAKURADA; Koichiro SUZUKI; Minoru HASHIBA

doi:10.14852/jcersjsuppl.112.0.S153.0

Journal of the Ceramic Society of Japan, Supplement 112-1, PacRim5 Special Issue

Session ID : 2

DOI https://doi.org/10.14852/jcersjsuppl.112.0.S153.0

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Host: The Ceramic Society of Japan

Co-host: Iketani Science and Technology Foundation, International Ceramic Federation, Commemorative Organization for the Japan World Exposition '70, The American Ceramic Society, The Australasian Ceramic Society, The Chinese Ceramic Society, The Korean Ceramic Society, Joint Research Consortium of Synergy Ceramics/Fine Ceramics Research Association, Nanotechnology Researchers Network Center of Japan, The Special Coordination Funds for Promoting Science and Technology, Japan National Tourist Organization, Aichi Prefectural Government, CASIO SCIENCE PROMOTION FOUNDATION, DAIKO FOUNDATION, Nagoya Convention and Visitors Bureau, The Asahi Glass Foundation, The Kao Foundation For Arts And Sciences, The Murata Science Foundation, The Ogasawara Foundation for the Promotion of Science & Engineering, ASAHI GLASS CO., LTD. Research Center, CENTRAL GLASS CO., LTD., ELECTRIC GLASS INDUSTRY ASSOCIATION OF JAPAN (EGAJ), Hattori Company, Ltd., Hitachi Research Laboratory, Hitachi, Ltd., HOYA CORPORATION, INAX Corporation, ITOCHU CERATECH CORP., Japan Cement Association, KYOCERA Corporation, KYUSHU REFRACTORIES CO., LTD., MINO CERAMIC CO., LTD., Murata Manufacturing Co., Ltd., NGK INSULATORS LTD., NGK SPARK PLUG CO., LTD., NICHIAS Corporation, NIKKO COMPANY, Nippon Electric Glass Co., Ltd., Nippon Sheet Glass Co., Ltd., NORITAKE CO., LIMITED, Tokuyama Corporation, TOTO LTD.

Papers

Electrophoretic Bubble-Free Deposition on Anodes from Aqueous Alumina and Zirconia Suspensions with Hydroquinone: Fabrication of Alumina/Zirconia Gradiented Composites

Osamu SAKURADA, Koichiro SUZUKI, Minoru HASHIBA

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Keywords: Electrophoretic deposition, Alumina, Zirconia, Hydroquinone, Functional gradiented material

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Abstract

Non-aqueous suspensions are preferred for electrophoretic deposition (EPD) to prevent electrolysis of the solvent and to obtain a bubble-free deposit. On the other hand, aqueous systems have the advantages of low cost and low environmental burden. However, water is decomposed into hydrogen and oxygen when a dc current is passed through an aqueous media. It is well known that hydroquinone (HQ) is easily oxidized to quinone (Q), and this reaction decreases the levels of dissolved and electrolytically produced oxygen. In the EPD process, oxygen produced electrolytically would be consumed by the chemical oxidation of HQ, followed by bubble-free deposition on the anode. In this study, we investigated EPD on various anodes of aqueous alumina and zirconia suspensions with HQ and also attempted to fabricate bubble-free alumina/zirconia gradiented composites.

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