Evaluation of ZrO2-Dispersed Al2O3 Ceramics Prepared  by Coprecipitation Technique

Yoshito NISHIKAWA; Hideki KUME; Suguru INAMURA; Hiroki MIYAMOTO; Sebastián Díaz de la TORRE

doi:10.14852/jcersjsuppl.112.0.S350.0

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

Session ID : 4

DOI https://doi.org/10.14852/jcersjsuppl.112.0.S350.0

Conference information

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

Evaluation of ZrO₂-Dispersed Al₂O₃ Ceramics Prepared by Coprecipitation Technique

Yoshito NISHIKAWA, Hideki KUME, Suguru INAMURA, Hiroki MIYAMOTO, Sebastián Díaz de la TORRE

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Keywords: Al₂O₃, ZrO₂, Coprecipitation, Bending strength, Homogeneous dispersion

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Abstract

Al₂O₃-ZrO₂ composite powder has been prepared using the coprecipitation technique. Al₂O₃ particles in the powder were surrounded with ZrO₂ particles whose sizes were about 50 nm. Al₂O₃-20 mass%ZrO₂(3 mol%Y₂O₃) bulk ceramics, made from the Al₂O₃-ZrO₂ composite powder, using hot isostatic pressing (HIP) after pressure-less sintering attained a mean bending strength of about 1.1 GPa. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) were used for analyzing the microstructure of the composites. Both a homogeneous dispersion of ZrO₂ particles in the Al₂O₃-ZrO₂ composite ceramics and the existence of fine ZrO₂ particles remaining at grain boundaries of the Al₂O₃ matrix might be two important factors to strengthen the Al₂O₃-Al₂O₃ grains coupling.

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