BaO-TiO2-WO3 Microwave Ceramics and Crystalline BaWO4 |
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| Authors: | Susumu Nishigaki Shinsuke Yano Hiroshi Kato Takami Hirai Toshio Nonomura |
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| Affiliation: | Narumi Technical Laboratory, Narumi China Corporation, 3 Denjiyama, Narumi-cho, Midori-ku, Nagoya 458, Japan |
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| Abstract: | Microwave ceramic resonators composed of BaO-TiO2-WO3 were developed. The effect of WO3 addition on the system of BaO·xTiO2·(1+x)yWO3 (x=4 and 4.5, y=0 to 0.04) was studied. The ceramics of this system are composed of crystallines including Ba2Ti9O20, BaTi4O9, BaWO4, and TiO2. At y=0.02, the BaO·4TiO2·0.1WO3 ceramic was found to have excellent microwave properties such as ε=35, Q=8400 at 6 GHz, and nearly 0 ppm/°C of τf. |
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