(Bi0.5Na0.5)ZrO3 modified KNN-based ceramics: Enhanced electrical properties and temperature insensitivity |
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| Affiliation: | 1. State Key Laboratory of High Performance Ceramics and Superfine Microstructures, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China;2. Shanghai Institute for Materials Genome, Shanghai, China;3. School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China;4. The Key Lab of Inorganic Functional Materials and Devices, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China;1. College of Chemistry and Materials Science, Sichuan Normal University, Chengdu, 610066, China;2. Bruker (Beijing) Scientific Technology Co., Ltd, Shanghai, 200233, China;3. Department of Applied Physics and Materials Research Centre, The Hong Kong Polytechnic University, Kowloon, Hong Kong, China;1. Sichuan Province Key Laboratory of Information Materials and Devices Application, Chengdu University of Information Technology, Chengdu 610225, PR China;2. Physics department, Southwest University for Nationalities, Chengdu 610041, PR China |
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| Abstract: | To further improve the properties of KNN-based lead-free ceramics, a new ceramic system, (0.98-x)K0.525Na0.475Nb0.965Sb0.035O3-0.02 BaZr0.5Hf0.5O3-x(Bi0.5Na0.5)ZrO3(KNNS-BZH-xBNZ) was designed, the relevant properties such as piezoelectricity, strain, and temperature stability were analysed in detail. It was found that the R-T phase boundary can be successfully constructed when x=0.030, and this two-phase coexistence shows relatively good comprehensive properties (d33~410 pC/N, TC~255 °C, Suni~0.132%, and d33*~441 pm/V). Meanwhile, its strain property also shows good temperature stability from room temperature to 180 °C (Suni100°C/SuniRT~97.5% and Suni180°C/SuniRT~83.9%), which is comparatively superior to many KNN-based ceramics and some lead-based ceramics. Therefore, KNNS-BZH-xBNZ ceramics may broaden the practical application of lead-free ceramics. |
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| Keywords: | KNN Lead-free ceramics Phase boundary Piezoelectricity Strain Temperature stability |
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