Preparation,phase structure and microwave dielectric properties of CoLi2/3Ti4/3O4 ceramic |
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| Authors: | Huanfu Zhou Xiaobin Liu Xiuli Chen Liang Fang |
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| Affiliation: | State Key Laboratory Breeding Base of Nonferrous Metals and Specific Materials Processing, Key Laboratory of Nonferrous Materials and New Processing Technology, Ministry of Education, Guilin University of Technology, Guilin 541004, China;State Key Laboratory Breeding Base of Nonferrous Metals and Specific Materials Processing, Key Laboratory of Nonferrous Materials and New Processing Technology, Ministry of Education, Guilin University of Technology, Guilin 541004, China;Key Laboratory of New Processing Technology for Nonferrous Metals and Materials, Ministry of Education, School of Materials Science and Engineering, Guilin University of Technology, Guilin 541004, China;State Key Laboratory Breeding Base of Nonferrous Metals and Specific Materials Processing, Key Laboratory of Nonferrous Materials and New Processing Technology, Ministry of Education, Guilin University of Technology, Guilin 541004, China;State Key Laboratory Breeding Base of Nonferrous metals and specific Materials Processing, Key Laboratory of Nonferrous Materials and New Processing Technology, Ministry of Education, School of Materials Science and Engineering, Guilin University of Technology, Guilin 541004, PR China;Guangxi Ministry-Province Jointly-Constructed Cultivation Base for State Key Laboratory of Processing for Non-ferrous Metal and Featured Materials, Guangxi Key Laboratory in Universities of Clean Metallurgy and Comprehensive Utilization for Non-ferrous Metals Resources, Collaborative Innovation Center for Exploration of Hidden Nonferrous Metal Deposits and Development of New Materials in Guangxi, School of Materials Science and Engineering, Guilin University of Technology, Guilin 541004, China;Collaborative Innovation Center for Exploration of Hidden Nonferrous Metal Deposits and Development of New Materials in Guangxi, School of Materials Science and Engineering, Guilin University of Technology, Guilin 541004, China |
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| Abstract: | A new low loss microwave dielectric ceramic with composition of CoLi2/3Ti4/3O4 was prepared by a conventional solid-state reaction method. The compound has a cubic spinel structure Fd-3m (227)] similar to MgFe2O4 with lattice parameters of a = 8.3939 Å, V = 591.42 Å3, Z = 8 and ρ = 4.30 g/cm3. This ceramic has a low sintering temperature (～1050 °C) and good microwave dielectric properties with relative permittivity of 21.4, Q × f value of 35,000 GHz and τf value of ?22 ppm/°C. Furthermore, the addition of BaCu(B2O5) (BCB) can effectively lower the sintering temperature from 1050 °C to 900 °C and does not induce much degradation of the microwave dielectric properties. Compatibility with Ag electrode indicates that the BCB added CoLi2/3Ti4/3O4 ceramics are good candidates for LTCC applications. |
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