Temperature stable high-Q microwave dielectric ceramics in (1 − x)BaTi4O9-xBaZn2Ti4O11 system |
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Authors: | Shengquan Yu Bin TangShuren Zhang Xiao Zhang |
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Affiliation: | State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu, 610054, China |
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Abstract: | The microwave dielectric properties of (1 − x)BaTi4O9-xBaZn2Ti4O11 ceramics were investigated by solid-state reaction technique for obtaining high-Q dielectric ceramics in BaO-ZnO-TiO2 system. And they were strongly determined by the chemical composition. As x was increased from 0.05 to 0.50, BaZn2Ti4O11 phase formed more and more. Therefore, the εr decreased from 37.3 to 32.8 and the Q × f values first raised from 45,300 GHz to 60,600 GHz (x = 0.30) and then started to decline to 58,700 GHz (x = 0.40), and the τf values varied gradually from 12 ppm/°C to − 13 ppm/°C. 0.7BaTi4O9-0.3BaZn2Ti4O11 ceramics sintered at 1240 °C for 3 h had excellent comprehensive microwave dielectric properties: εr = 34.2, Q × f = 60,600 GHz and τf = − 2 ppm/°C. |
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Keywords: | Ceramics Dielectrics Microwave dielectric ceramics |
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