Microwave Dielectric Properties and Microstructure of 0.85MgTiO3–0.15Ca0.6La0.8/3TiO3 Dielectric Ceramics with Added Sintering Aids
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概要
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The effects of additive sintering aids on the microstructures and microwave dielectric properties of 0.85MgTiO3–0.15Ca0.6La0.8/3TiO3 ceramics were investigated. CuO was selected as a liquid phase sintering aid to lower the sintering temperature of 0.85MgTiO3–0.15Ca0.6La0.8/3TiO3 ceramics. With added CuO, the densification temperature of 0.85MgTiO3–0.15Ca0.6La0.8/3TiO3 can be effectively reduced from 1450 to 1160–1300°C. Low-level doping of CuO (0.5–5 wt %) significantly improves the density and dielectric properties of 0.85MgTiO3–0.15Ca0.6La0.8/3TiO3 ceramics. The quality factor $Q\times f$ was strongly dependent upon the amount of additives. $Q\times f$ values of 60000 and 20000 GHz could be obtained at 1160–1300°C with 0.5 and 5 wt % CuO added, respectively. Over all ranges of addition, the relative dielectric constants differed significantly and ranged from 23.2 to 26.1. The temperature coefficient varied from 0 to $-3.7$ ppm/°C.
- 2005-07-15
著者
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Chen Yuan-bin
Department Of Electrical Engineering National Cheng Kung University
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WEI Chih-Hung
R&D Center, Compconents Business Group, Delta Electronics, Inc.
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HSIEH Yu-Ping
R&D Center, Compconents Business Group, Delta Electronics, Inc.
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HUANG Yi-Hong
R&D Center, Compconents Business Group, Delta Electronics, Inc.
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Lon Chen-weng
Department Of Electrical Engineering National Cheng Kung University
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Huang Cheng-liang
Department Of Electrical Enggineering National Cheng-kung University
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Hsieh Yu-Ping
R&D Center, Compconents Business Group, Delta Electronics, Inc., Taiwan, R.O.C.
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Lon Chen-Weng
Department of Electrical Engineering, National Cheng Kung University, 1 University Rd., Tainan 70101, Taiwan, R.O.C.
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Huang Yi-Hong
R&D Center, Compconents Business Group, Delta Electronics, Inc., Taiwan, R.O.C.
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Wei Chih-Hung
R&D Center, Compconents Business Group, Delta Electronics, Inc., Taiwan, R.O.C.
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