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Low temperature sintering of Al2O3 microwave dielectric ceramics co-doped with 1.5wt%CuO-3wt%Nb2O5-0.5wt%ZrO2

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Abstract

In this paper, the sintering behavior, microstructure and microwave dielectric properties of Al2O3 ceramics co-doped with 1.5wt%CuO-3wt%Nb2O5 (CN) and 1.5wt%CuO-3wt%Nb2O5-0.5wt%ZrO2 (CNZ) were systematically studied. The results show that the sintering temperature of Al2O3 ceramics could be effectively decreased by adding 5 wt% CNZ. After sintered at 1000 °C for 5 h, Al2O3 ceramics with high density (3.91 g/cm3), uniform microstructure and good microwave dielectric properties (εr = 9.79, Q × f = 15,541.5 GHz) could be obtained by adding 5 wt% CNZ. Higher temperature can further increase the density of the sample, but it will also lead to abnormal grain growth and decrease of Q × f value. Besides, the effect of CNZ on the low temperature densification, the changing of microstructure and dielectric properties of ceramics samples were also discussed.

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Authors and Affiliations

  1. School of Materials Science and Engineering, East China University of Science and Technology, Shanghai, 200237, China

    Peng Zhang, Honglei Tao & Wei Li

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  1. Peng Zhang
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  2. Honglei Tao
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  3. Wei Li
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Zhang, P., Tao, H. & Li, W. Low temperature sintering of Al2O3 microwave dielectric ceramics co-doped with 1.5wt%CuO-3wt%Nb2O5-0.5wt%ZrO2. J Mater Sci: Mater Electron 33, 15773–15778 (2022). https://doi.org/10.1007/s10854-022-08479-0

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  • DOI: https://doi.org/10.1007/s10854-022-08479-0

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