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Phase structure and microwave dielectric properties of 0.85(0.74CaTiO3–0.26SmAlO3)–0.15Ca1.15Sm0.85Al0.85Ti0.15O4 composite ceramics prepared by reaction-sintering process

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Abstract

0.85(0.74CaTiO3–0.26SmAlO3)–0.15Ca1.15Sm0.85Al0.85Ti0.15O4 (CSC) composite ceramics were prepared by a reaction-sintering method. The phase structure, sintering behavior and microwave dielectric properties of CSC ceramics were investigated. The preparation process of reaction-sintering route (RS) is simple. XRD patterns show that Ca0.74Ti0.74Sm0.26Al0.26O3 (similar to CaTiO3), SmAlO3 and Ca1.15Sm0.85Al0.85Ti0.15O4 phases are formed in the CSC ceramics. The grain size and dielectric constant of CSC ceramics increase with rising the sintering temperature. As the sintering temperature increases, the quality factor (Q × f) and τf value of the CSC ceramics increase to the maximum values first and then decrease. The bulk density fluctuates up and down around a value, but little change. The ceramics sintered at 1500 °C got the best microwave dielectric performances with εr = 35.9, Q × f = 49,221 GHz, τf = − 0.53 ppm/°C.

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Acknowledgements

This work was supported by Natural Science Foundation of China (Nos. 61761015 and 11664008), Natural Science Foundation of Guangxi (Nos. 2017GXNSFFA198011, 2018GXNSFFA050001 and 2017GXNSFDA198027) and High Level Innovation Team and Outstanding Scholar Program of Guangxi Institutes.

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Authors and Affiliations

  1. Collaborative Innovation Center for Exploration of Hidden Nonferrous Metal Deposits and Development of New Materials in Guangxi, Key Laboratory of Nonferrous Materials and New Processing Technology, Ministry of Education, School of Materials Science and Engineering, Guilin University of Technology, Guilin, 541004, China

    Xi Wang, Kangguo Wang, Xiaowen Luan, Xianjie Zhou, Sang Hu, Shicheng Zhou, Sen He, Hailin Zhang, Xiuli Chen & Huanfu Zhou

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  1. Xi Wang
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Wang, X., Wang, K., Luan, X. et al. Phase structure and microwave dielectric properties of 0.85(0.74CaTiO3–0.26SmAlO3)–0.15Ca1.15Sm0.85Al0.85Ti0.15O4 composite ceramics prepared by reaction-sintering process. J Mater Sci: Mater Electron 32, 8863–8871 (2021). https://doi.org/10.1007/s10854-021-05559-5

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