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    CHENG Chen, LI Wei. Low Temperature Sintering of BaTiO3 Ceramics via Co-Doping with CuO, B2O3 and Li2O[J]. Journal of East China University of Science and Technology, 2022, 48(3): 332-336. DOI: 10.14135/j.cnki.1006-3080.20210301001
    Citation: CHENG Chen, LI Wei. Low Temperature Sintering of BaTiO3 Ceramics via Co-Doping with CuO, B2O3 and Li2O[J]. Journal of East China University of Science and Technology, 2022, 48(3): 332-336. DOI: 10.14135/j.cnki.1006-3080.20210301001

    Low Temperature Sintering of BaTiO3 Ceramics via Co-Doping with CuO, B2O3 and Li2O

    • Due to the high sintering temperature of BaTiO3 based ceramics, only noble metal materials could be used as internal electrodes. Therefore, it was of great practical significance to reduce the sintering temperature of BaTiO3 based ceramics to match with the base metal electrode materials with lower melting point. In this work, BaTiO3 ceramics were sintered at low temperatures via co-doping with CuO, B2O3 and Li2O. The phase composition, density and microstructure of the ceramics at different sintering temperatures were investigated. The results showed that co-doping of CuO, B2O3 and Li2O could effectively reduce the sintering temperature of BaTiO3 ceramics. Single tetragonal phase BaTiO3 ceramics with high density of 5.75 g/cm3 could be obtained after sintering at 950 ℃ for 2 h and the relative density was 95.6%, while higher sintering temperature led to the decrease of the density of the ceramics. The density of sample sintered at 1100 ℃ was only 5.23 g/cm3 and the relative density was 86.9%. Meanwhile, the microstructure of BaTiO3 ceramics changed obviously with the increase of sintering temperature, the grains grew rapidly. The low eutectic phase and solid solution reaction during 0.7%CuO-1.5%B2O3-0.3%Li2O (BCL) co-doping were the main reasons for decreasing sintering temperature.
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