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Study on the dielectric properties of Mg-doped NaBiTi6O14 ceramics |
| Yong Chen(陈勇)1, Simin Xue(薛思敏)1, Qian Luo(骆迁)1, Huyin Su(苏虎音)1, Qi Chen(陈琪)1, Zhen Huang(黄镇)1, Linfang Xu(徐玲芳)1, Wanqiang Cao(曹万强)1,2, Zhaoxiang Huang(黄兆祥)3 |
1 School of Physics and Electronic Science, Key Laboratory of Ferro & Piezoelectric Materials and Devices of Hubei Province, Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Hubei University, Wuhan 430062, China;
2 School of Materials Science and Engineering, Hubei University, Wuhan 430062, China;
3 Department of Information Science and Technology, WenHua College, Wuhan 430074, China |
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Abstract With the interest in using lead-free materials to replace lead-containing materials increasing, the use of Na0.5Bi0.5TiO3 (NBT) has come into our sight. We studied the composition of NBT and found that NaBiTi6O14 ceramics can be compositionally tuned by Mg-doping on the Ti-site to optimize the dielectric properties. In this study, Mg-doped NaBiTi6O14 (NaBi(Ti0.98Mg0.02)6O14-δ) ceramics were prepared by a conventional mixed oxide route at different sintering temperatures, and their dielectric properties have been studied at a wide temperature range. X-ray diffraction (XRD) patterns of the NBT-based ceramics indicate that all samples have a pure phase without any secondary impurity phase. The experimental data show that after Mg-doping, the relative permittivity and dielectric loss become lower at 1040, 1060, and 1080℃ except 1020℃ and at different frequencies from 10 kHz, 100 kHz to 1 MHz. Take 1060℃ for example, when the sintering temperature is 1060℃ at 1 MHz, the minimum relative permittivity of NaBiTi6O14 is 32.9 and the minimum dielectric loss is 0.01417, the relative permittivity of NaBi(Ti0.98Mg0.02)6O14-δ under the same condition is 25.8 and the dielectric loss is 0.000104. We explored the mechanism of Mg-doping and surprisingly found that the dielectric property of NaBi(Ti0.98Mg0.02)6O14-δ becomes better owing to Mg-doping. Thus, NaBi(Ti0.98Mg0.02)6O14-δ can be used in microwave ceramics and applied to new energy materials.
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Received: 18 October 2016
Revised: 20 January 2017
Accepted manuscript online:
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PACS:
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77.22.-d
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(Dielectric properties of solids and liquids)
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77.84.-s
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(Dielectric, piezoelectric, ferroelectric, and antiferroelectric materials)
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| Fund: Project supported by the Fund from the Hubei Provincial Department of Education, China (Grant No. D20161006). |
Corresponding Authors:
Wanqiang Cao, Zhaoxiang Huang
E-mail: caowanq@163.com;huangzhaox@163.com
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Cite this article:
Yong Chen(陈勇), Simin Xue(薛思敏), Qian Luo(骆迁), Huyin Su(苏虎音), Qi Chen(陈琪), Zhen Huang(黄镇), Linfang Xu(徐玲芳), Wanqiang Cao(曹万强), Zhaoxiang Huang(黄兆祥) Study on the dielectric properties of Mg-doped NaBiTi6O14 ceramics 2017 Chin. Phys. B 26 047701
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