Ceramic materials of the Bi0.5Na0.5TiO3– xZnO (BNT – xZnO) system with the content of ZnO x = 0 and 2.0 wt.% obtained by the classical solid-state reaction method are studied. The initial powders (Bi2O3, TiO2 and Na2CO3) with a ZnO addition are milled for 10 h, calcined at 850°C for 3 h, pressed, and sintered at 1050°C for 3 h. The morphology and the microstructure of the sintered granules are studied using XRD, scanning electron microscopy, and a helium pycnometer. It is shown that the material acquires a solid solution of (Bi0.5Na0.5)TiO3 with a structure of pure perovskite and Zn2TiO4 spinel. The piezoelectric coefficient d33 after the sintering at 1050°C for the BNT ceramics amounts to 155 pC/N; in the case of BNT with 2 wt.% ZnO the value is 181 pC/N. The ZnO addition to the BNT ceramics raises the density of the material and provides an electrical conductivity of 7.48 × 108 Ω∙ cm.
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Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 2, pp. 56 – 62, February, 2023.
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Mebrek, A., Boukhezar, S., Azzi, A. et al. Microstructural and Electrical Characteristics of (Bi0.5Na0.5)TiO3 – ZnO Piezoceramics. Met Sci Heat Treat 65, 116–121 (2023). https://doi.org/10.1007/s11041-023-00900-7
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DOI: https://doi.org/10.1007/s11041-023-00900-7