Abstract
In order to reduce the sintering temperature of ceramics, the effects of binary composite sintering aids, Li2CO3 and CuO, on the sintering temperature and properties of 0.7BiFeO3-0.3BaTiO3-0.0035MnCO3 + 0.002Li2CO3 + xCuO (BF-BT-LC + xCuO) ceramics were studied by traditional solid-state sintering. The results show that the sintering liquid phase can effectively promote the sintering of BF-BT-LC + xCuO ceramics by adding a certain amount of Li2CO3 and changing the amount of CuO. The samples sintered at 930°C/2 h with 0.4 mol.% CuO get a piezoelectric constant d33 = 168 pC/N, an electromechanical coupling coefficient kp = 0.302, and a mechanical quality factor Qm = 31.207. The addition of CuO was conducive to obtaining stable BF-BT-LC + xCuO piezoelectric ceramics. We conclude that the composite sintering aids, Li2CO3 and CuO, can effectively promote the sintering of BF-BT-LC + xCuO, which is beneficial to obtain BF-BT-LC + xCuO ceramics with a wide sintering temperature range and stable properties.
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This work was financially supported by the National Key R&D Program of China (2017YFB0310400) and the National Natural Science Foundation of China (11364008) and the Natural Science Foundation of Guangxi (2014GXNSFAA118311) and Guangxi Key Laboratory of Information Materials and Graduate Research and Innovation Projects of Jiangsu Province (CN) (KYCX19_1588).
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Guan, S., Yang, H., Qiao, G. et al. Effects of Li2CO3 and CuO as Composite Sintering Aids on the Structure, Piezoelectric Properties, and Temperature Stability of BiFeO3-BaTiO3 Ceramics. J. Electron. Mater. 49, 6199–6207 (2020). https://doi.org/10.1007/s11664-020-08365-7
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DOI: https://doi.org/10.1007/s11664-020-08365-7