Enhanced piezoelectric properties for potassium sodium niobate lead-free piezoelectric ceramics prepared by microwave technology

Haitao Li; Mingyang Li; Xiaoxue Jiang; Changda Zhu; Hongguang Wang; Aowei Deng; Guozhong Zang; Yongjun Gu

doi:10.54227/mlab.20230019

Article navigation > Materials Lab > 2023 > In Press

Haitao Li, Mingyang Li, Xiaoxue Jiang, Changda Zhu, Hongguang Wang, Aowei Deng, Guozhong Zang, Yongjun Gu. Enhanced piezoelectric properties for potassium sodium niobate lead-free piezoelectric ceramics prepared by microwave technology[J]. Materials Lab. doi: 10.54227/mlab.20230019

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RESEARCH ARTICLE

Enhanced piezoelectric properties for potassium sodium niobate lead-free piezoelectric ceramics prepared by microwave technology

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1.
School of Materials Science and Engineering, Henan University of Science and Technology, Luoyang 471023, PR China
2.
School of physics and Engineering, Henan University of Science and Technology, Luoyang 471023, PR China
Corresponding author: listone@163.com

Abstract

Abstract

Potassium-sodium niobate (Na, K)NbO₃ (NKN) powder was synthesized at low temperature via microwave-assisted hydrothermal solovthermal method (MHSM). The resultant powder was characterized by X-ray diffraction (XRD) and scanning electron microscope (SEM). XRD results showed that pure (Na, K)NbO₃ powder with a single perovskite structure was successfully synthesized when the concentration of mineralization exceeded 1 M. In order to reduce the volatilization of alkaline elements, NKN ceramics derived from 5M-powder were prepared in a microwave furnace. Microstructure, stoichiometry, and electrical properties of the obtained ceramics were investigated. The piezoelectric coefficient (d₃₃), electromechanical coupling coefficient (k_p) and remnant polarization (P_r) of the sample sintered at 1050 °C show optimal values of 132 pC/N, 38% and 26.3 µC cm^-2, respectively. The results indicate that the microwave heating is a promising method for synthesizing and sintering NKN-based ceramics.
- Potassium-sodium niobates /
- lead-free piezoelectric ceramics /
- hydrothermal solovthermal synthesis /
- microwave sintering /
- morphtropic phase boundary
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Received Date: 08 April 2023

Accepted Date: 22 April 2023

Available Online: 13 June 2023

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