Pyroelectric properties of 91.5<inline-formula><math display="inline" overflow="scroll" xmlns:mml="http://www.w3.org/1998/Math/MathML"><msub><mrow><mtext>Na</mtext></mrow><mrow><mn>0</mn><mo class="MathClass-punc">.</mo><mn>5</mn></mrow></msub></math></inline-formula><inline-formula><math display="inline" overflow="scroll" xmlns:mml="http://www.w3.org/1998/Math/MathML"><msub><mrow><mtext>Bi</mtext></mrow><mrow><mn>0</mn><mo class="MathClass-punc">.</mo><mn>5</mn></mrow></msub></math></inline-formula>TiO<sub>3</sub>–8.5<inline-formula><math display="inline" overflow="scroll" xmlns:mml="http://www.w3.org/1998/Math/MathML"><msub><mrow><mtext>K</mtext></mrow><mrow><mn>0</mn><mo class="MathClass-punc">.</mo><mn>5</mn></mrow></msub></math></inline-formula><inline-formula><math display="inline" overflow="scroll" xmlns:mml="http://www.w3.org/1998/Math/MathML"><msub><mrow><mtext>Bi</mtext></mrow><mrow><mn>0</mn><mo class="MathClass-punc">.</mo><mn>5</mn></mrow></msub></math></inline-formula><inline-formula><math display="inline" overflow="scroll" xmlns:mml="http://www.w3.org/1998/Math/MathML"><msub><mrow><mtext>TiO</mtext></mrow><mrow><mn>3</mn><mspace width=".17em" class="thinspace"></mspace></mrow></msub></math></inline-formula>lead-free single crystal

Bo Zhang; Renbing Sun; Fang Wang; Tangfu Feng; Pengna Zhang; Haosu Luo

doi:10.1142/S2010135X21500235

Journal of Advanced Dielectrics, Volume. 11, Issue 6, 2150023(2021)

Pyroelectric properties of 91.5 ${Na}_{0.5}$ ${Bi}_{0.5}$ TiO₃–8.5 $K_{0.5}$ ${Bi}_{0.5}$ ${TiO}_{3}$ lead-free single crystal

Bo Zhang¹, Renbing Sun^1、*, Fang Wang¹, Tangfu Feng¹, Pengna Zhang¹, and Haosu Luo²

Author Affiliations

¹School of Materials and Chemical Engineering, Ningbo University of Technology, Ningbo, Zhejiang 315016, P. R. China

²Key Laboratory of Inorganic Functional Materials and Devices, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Jiading, Shanghai 201800, P. R. China

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The dielectric and pyroelectric performances of 91.5 ${Na}_{0.5}$ ${Bi}_{0.5}$ TiO₃–8.5 $K_{0.5}$ ${Bi}_{0.5}$ TiO₃ lead-free single crystal were investigated. The depolarization temperature of the crystal is about 153 $^{\circ}$ C. Among the <001>, <110>, and <111> crystallographic orientations, the <111>-oriented crystal possesses the highest pyroelectric coefficient and the largest figures of merit, and the values of $p$ , $F_{v}$ , and $F_{d}$ are 5.63×10 $^{- 4}$ C/m² •K, 0.06 m²/C, and 21.5 $μ$ Pa $^{- 1 / 2}$ for the <111>-oriented crystal at room temperature. The $F_{d}$ and $F_{v}$ exhibit weak frequency dependence in the range of 100–300 Hz. With the increase of the temperature, the value of $p$ increases, while the value of $F_{v}$ decreases from 18 $^{\circ}$ C to 103 $^{\circ}$ C.The dielectric and pyroelectric performances of 91.5 ${Na}_{0.5}$ ${Bi}_{0.5}$ TiO₃–8.5 $K_{0.5}$ ${Bi}_{0.5}$ TiO₃ lead-free single crystal were investigated. The depolarization temperature of the crystal is about 153 $^{\circ}$ C. Among the <001>, <110>, and <111> crystallographic orientations, the <111>-oriented crystal possesses the highest pyroelectric coefficient and the largest figures of merit, and the values of $p$ , $F_{v}$ , and $F_{d}$ are 5.63×10 $^{- 4}$ C/m² •K, 0.06 m²/C, and 21.5 $μ$ Pa $^{- 1 / 2}$ for the <111>-oriented crystal at room temperature. The $F_{d}$ and $F_{v}$ exhibit weak frequency dependence in the range of 100–300 Hz. With the increase of the temperature, the value of $p$ increases, while the value of $F_{v}$ decreases from 18 $^{\circ}$ C to 103 $^{\circ}$ C.

Keywords

dielectric properties Lead-free pyroelectric properties single crystal

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Bo Zhang, Renbing Sun, Fang Wang, Tangfu Feng, Pengna Zhang, Haosu Luo. Pyroelectric properties of 91.5 ${Na}_{0.5}$ ${Bi}_{0.5}$ TiO₃–8.5 $K_{0.5}$ ${Bi}_{0.5}$ ${TiO}_{3}$ lead-free single crystal[J]. Journal of Advanced Dielectrics, 2021, 11(6): 2150023

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Paper Information

Category: Research Articles

Received: May. 7, 2021

Accepted: Aug. 12, 2021

Published Online: Feb. 21, 2022

The Author Email: Sun Renbing (renbingsun@hotmail.com)

DOI:10.1142/S2010135X21500235

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology