Preparation and Thermal Expansion of Novel Glasses  in the System ZrO2-WO3-Al2O3

T. TACHIBANA; S. UCHIDA; N. YAMAMOTO; T. HANADA

doi:10.14852/jcersjsuppl.112.0.S1254.0

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

Session ID : 17

DOI https://doi.org/10.14852/jcersjsuppl.112.0.S1254.0

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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

Preparation and Thermal Expansion of Novel Glasses in the System ZrO₂-WO₃-Al₂O₃

T. TACHIBANA, S. UCHIDA, N. YAMAMOTO, T. HANADA

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Keywords: Tungstate glass, Thermal expansion, ZrO₂-WO₃-Al₂O₃ system

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Abstract

ZrO₂-WO₃-Al₂O₃ glasses were prepared by means of the melting and quenching method, and their thermal expansion, together with density and infrared absorption spectra, were measured. The thermal expansion was determined by using thermomechanical analyzer (TMA). The glass-forming region was in the range of ZrO₂ 5-25, WO₃ 65-75, Al₂O₃ 5-15 mol%. The thermal expansion coefficients of the glasses in the system ZrW₂O₈-Al₂(WO₄)₃ were 25×10^-7 K^-1, which is lower than that of pyrex. The results of density and infrared absorption spectra indicated that tungsten ions in these glasses take the 6-coordinated state, and aluminum ions the mixture of 4- and 6-coordinated states.

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