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Microwave dielectric properties of low-temperature sintered (1 − x)CaMoO(LiY)MoO (0.1 ≤ x ≤ 0.8) ceramics

Journal of Materials Science: Materials in Electronics, ISSN: 1573-482X, Vol: 33, Issue: 7, Page: 3566-3575
2022
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In this work, (1 − x)CaMoO(LiY)MoO ((1 − x)CM–xLYM, 0.1 ≤ x ≤ 0.8) ceramic specimens were successfully fabricated by the conventional solid-state reaction method at low temperatures (≤ 950 °C). The effects of sintering temperature and compositional variation on the microwave dielectric properties (MDPs) were investigated. The optimal MDPs of ε = 11.1, Q ×f = 30,568 GHz and τ =− 0.04 ppm/°C were achieved in the specimen with x = 0.15 at the sintering temperature of 800 °C. The mechanisms of the changes of the MDPs with respect to the compositional variation were studied by analyses of polarizability, packing fraction, bond valence, and Raman spectroscopy. Additionally, the present ceramic specimens showed outstanding compatibility with Ag electrodes, indicating that the (1 − x)CM–xLYM ceramics have great potential to be applied as low-temperature co-fired ceramic (LTCC) materials.

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