Effect of B2O3 Addition to La(Co1/2Ti1/2)O3 Ceramics on Sintering Behavior and Microwave Dielectric Properties
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概要
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Sintering behaviors and microstructural characteristics of La(Co1/2Ti1/2)O3 ceramics were investigated. The La(Co1/2Ti1/2)O3 ceramics were prepared by the conventional solid-state route. Doping with B2O3 (up to 0.75 wt %) can effectively promote the densification of La(Co1/2Ti1/2)O3 ceramics at a low sintering temperature. With B2O3 addition, the sintering temperature of La(Co1/2Ti1/2)O3 can be effectively reduced from 1440 to 1230–1350 °C. At 1350 °C/6 h, La(Co1/2Ti1/2)O3 ceramic with 0.25 wt % B2O3 addition possesses a dielectric constant ($\varepsilon_{\text{r}}$) of 30, a $Q\times f$ value of 64,600 GHz (at 8 GHz) and a temperature coefficient of resonant frequency ($\tau_{\text{f}}$) of $-48$ ppm/°C. The B2O3-doped La(Co1/2Ti1/2)O3 ceramic is applicable in microwave devices requiring low sintering temperature.
- 2006-11-15
著者
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Huang Cheng-liang
Department Of Electrical Enggineering National Cheng-kung University
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Tseng Ching-Fanf
Department of Electrical Engineering, National Cheng Kung University, No. 1 University Rd., Tainan 70101, Taiwan
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