主催: The Ceramic Society of Japan
共催: 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.
Solvothermal treatment of AgNO3 in alcohol-water mixed solvent dispersed with γ-alumina (γ-Al2O3) powders at 498 K for 2 h was conducted to prepare Ag/(γ-Al2O3) composite powders for catalysts. The influence of ethanol content on the crystalline phase and microstructure of solvothermal products was investigated. With decreasing ethanol content in the solvent, the alumina matrix phase gradually changes from γ-Al2O3 to boehmite (γ-AlOOH), accordingly, the ratio of larger rhombic γ-AlOOH to smaller needle-like γ-Al2O3 increased. This phase change resulted in the decrease of the BET specific surface area and total pore volume and a shift of the characteristic pore size and pore size distribution. During the solvothermal treatment in ethanol/water mixed solvents, silver nanoparticles precipitated from the solution to form Ag/(γ-AlOOH, γ-Al2O3) nano-composites whereas no precipitation occurred in pure water.