High‐temperature piezoelectric properties of 0‐3 type CaBi4Ti4O15:x wt%BiFeO3 composites |
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| Authors: | Ahmad Hussain Muhammad Adnan Qaiser Ji Zhang Shan‐Tao Zhang Yiping Wang Ying Yang Zhiguo Liu Guoliang Yuan |
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| Affiliation: | 1. School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing, China;2. National Laboratory of Solid State Microstructures, Nanjing University, Nanjing, China;3. Precision Driving Laboratory, Nanjing University of Aeronautics and Astronautics, Nanjing, China |
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| Abstract: | The 0‐3 type CaBi4Ti4O15:30 wt%BiFeO3 composite shows much better high‐temperature piezoelectric properties than the single‐phase CaBi4Ti4O15 or BiFeO3 ceramics. The composite with 0‐3 type connectivity exhibits a high density of 7.01 g/cm3, a saturated polarization of 21.5 μC/cm2 and an enhanced piezoelectric d33 of 25 pC/N. After the poled composite was annealed at 600°C, its d33 is 21 pC/N at room temperature. Resistance of the composite decreases slowly from 109 ohm at 20°C to ~105 ohm at 500°C. Furthermore, the poled composite shows strong radial and thickness dielectric resonances at 20°C‐500°C. |
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| Keywords: | 0‐3 type connectivity BiFeO3 CaBi4Ti4O15 High‐temperature piezoelectric |
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