Effect of Bi2O3 additives on sintering and microwave dielectric behavior of La(Mg0.5Ti0.5)O3 ceramics |
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| Authors: | Kok-Wan Tay Yen-Pei Fu Qi-Feng Huang Fan-Hao Jang |
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| Affiliation: | 1. Department of Electrical Engineering, Wu-Feng Institute of Technology, Ming-Hsiung, Chiayi 621, Taiwan;2. Department of Materials Science and Engineering, National Dong Hwa University, Shou-Feng, Hualien 974, Taiwan;3. Graduate School of OptoMechatronics and Materials, Wu-Feng Institute of Technology, Ming-Hsiung, Chiayi 621, Taiwan |
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| Abstract: | Bi2O3 was selected as liquid phase sintering aid to lower the sintering temperature of La(Mg0.5Ti0.5)O3 ceramics. The sintering temperature of La(Mg0.5Ti0.5)O3 ceramics is generally high, about 1600 °C. However, the sintering temperature was significantly lowered about 275 °C from 1600 °C to 1325 °C by incorporating in 15 mol% Bi2O3 and revealed the optimum microwave dielectric properties of dielectric constant (?r) value of 40.1, a quality factor (Q × f) value of 60,231 GHz, and the temperature coefficient (τf) value of 70.1 ppm/°C. During all addition ranges, the relative dielectric constants (?r) were different and ranged from 32.0 to 41.9, the quality factors (Q × f) were distributed in the range of 928–60,231 GHz, and the temperature coefficient (τf) varies from 0.3 ppm/°C to 70.3 ppm/°C. Noticeably, a nearly zero τf can be found for doping 5 mol% Bi2O3 sintering at 1325 °C. It implies that nearly zero τf can be achieved by appropriately adjusting the amount of Bi2O3 additions and sintering temperature for La(Mg0.5Ti0.5)O3 ceramics. |
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| Keywords: | A Powder: solid-state reaction A Sintering C Dielectric properties |
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