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Effects of NiO addition on structure and dielectric properties of BaTiO3-based ceramics

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Abstract

The phase structure, microstructure, ferroelectric and dielectric properties of NiO-modified BaTiO3-4.0 mol%Nb2O5 ceramics (BT-Nb-Ni) were systematically investigated. All the specimens revealed cubic perovskite structure along with Ba3Nb3.2Ti5O21 second phase by XRD analysis. Small amount of NiO addition (x ≤ 0.5) had the effect of inhibiting grain growth, while a further increase of NiO content (x ≥ 1.0) led to relatively large grains with an average grain size of ~ 0.40 μm. From P-E hysteresis loops and modified Curie–Weiss fitting, NiO addition first reduced and then enhanced the relaxor behaviour of the system. The εr-T curves of BT-Nb-Ni ceramics were significantly flattened, leading to greatly optimized dielectric temperature stability. The optimum property was achieved in the composition BT-Nb-2.0%Ni with εr = 1380 and △C/C25 °C ≤  ± 15% in the temperature range of − 65–170 °C.

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Acknowledgement

This work was supported by the National Natural Science Foundation of China (No. 51372191), Start-up Grant of Chengdu University of Technology (No. 10900-KYQD-06848), Young and Middle-aged Key Teachers Development Fund of Chengdu University of Technology (No. 10912-JXGG2020-06848), Sichuan Science and Technology Program (No. 2021JDRC0105).

Funding

This work was supported by the National Natural Science Foundation of China (No. 51372191), Start-up Grant of Chengdu University of Technology (Grant No. 10900-KYQD-06848), Young and Middle-aged Key Teachers Development Fund of Chengdu University of Technology (No. 10912-JXGG2020-06848).

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Authors and Affiliations

  1. College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu, 610059, China

    Qi Xu, Wanting Huang & Rui Deng

  2. State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, School of Material Science and Engineering, Wuhan University of Technology, Wuhan, 430070, China

    Hanxing Chen & Hanxing Liu

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  1. Qi Xu
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  2. Wanting Huang
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  3. Rui Deng
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  4. Hanxing Chen
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QX designed and wrote the manuscript. WH and RD completed some data processing. HC did some of the experiments. HL provided technical support during the study.

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Correspondence to Qi Xu.

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Xu, Q., Huang, W., Deng, R. et al. Effects of NiO addition on structure and dielectric properties of BaTiO3-based ceramics. J Mater Sci: Mater Electron 32, 13539–13548 (2021). https://doi.org/10.1007/s10854-021-05930-6

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  • DOI: https://doi.org/10.1007/s10854-021-05930-6

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