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Relationship between microstructure and microwave dielectric properties of glass-free low temperature co-fired CaLa2(MoO4)4 ceramic

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Abstract

CaLa2(MoO4)4 ceramic material with a tetragonal scheelite structure was fabricated via a traditional solid-state reaction method. The CaLa2(MoO4)4 belongs to the tetragonal system of I41/a space group. Dense CaLa2(MoO4)4 ceramic can be formed at the optimal sintering temperature of 950 °C, and the sample exhibits good microwave dielectric properties of εr = 10.52, Qf = 37,497 GHz, τf = – 58 ppm/°C. The change of εr can be attributed to the density and Raman shift of ceramics, while the τf value can be attributed to the change of bond valence caused by the distribution of different ions at the A site. Raman spectroscopy reveals the correlation between microwave dielectric properties and lattice vibration of CaLa2(MoO4)4 ceramic. In addition, the compatibility between CaLa2(MoO4)4 ceramics and Ag was evaluated. These results indicate that CaLa2(MoO4)4 ceramics have broad prospects in LTCC applications.

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Funding

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

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  1. Key Laboratory of Nonferrous Materials and New Processing Technology, School of Materials Science and Engineering, Ministry of Education, Guilin University of Technology, Guilin, 541004, China

    Xiaoli Wei, Yinghan He, Xiuli Chen & Huanfu Zhou

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  1. Xiaoli Wei
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  2. Yinghan He
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  3. Xiuli Chen
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  4. Huanfu Zhou
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All authors contributed to the study conception and design. Material preparation, data collection and analysis were performed by XW, YH, XC and HZ. The first draft of the manuscript was written by XW and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.

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Correspondence to Huanfu Zhou.

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Wei, X., He, Y., Chen, X. et al. Relationship between microstructure and microwave dielectric properties of glass-free low temperature co-fired CaLa2(MoO4)4 ceramic. J Mater Sci: Mater Electron 34, 1738 (2023). https://doi.org/10.1007/s10854-023-11175-2

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