Low temperature sintering and microwave dielectric properties of TiO2 ceramics |
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| Affiliation: | 1. College of Physics and Information Technology, Shaanxi Normal University, Xi’an 710062, China;2. College of Science, Anhui University of Science and Technology, Huainan 232001, China;3. The Key Laboratory of Electronic Thin Film and Integrated Device, University of Electronic Science and Technology of China, Chengdu 610054, China;1. National Engineering Research Center of Electromagnetic Radiation Control Materials, University of Electronic Science and Technology of China, Jianshe Road, Chengdu, 610054, People''s Republic of China;2. State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Jianshe Road, Chengdu, 610054, People''s Republic of China |
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| Abstract: | The TiO2 ceramics were prepared by a solid-state reaction in the temperature range of 920–1100 °C for 2 h and 5 h using TiO2 nano-particles (Degussa-P25 TiO2) as the starting materials. The sinterability and microwave properties of the TiO2 ceramics as a function of the sintering temperature were studied. It was demonstrated that the rutile phase TiO2 ceramics with good compactness could be readily synthesized from the Degussa-P25 TiO2 powder in the temperature range of 920–1100 °C without the addition of any glasses. Moreover, the TiO2 ceramics sintered at 1100 °C/2 h and 920 °C/5 h demonstrated excellent microwave dielectric properties, such as permittivity (?r) value >100, Q × f > 23,000 GHz and τf ? 200 ppm/°C. |
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| Keywords: | Microwave properties LTCC Rutile ceramics |
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