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Size Dependent Structures and Properties of Na0.5Bi0.5TiO3-Based Ceramics for Piezoelectric Sensors
Pan Chen1,2,3, Baojin Chu1,*
1 CAS Key laboratory of materials for energy conversion and Department of materials science and engineering, University
of Science and Technology of China, No. 96 Jinzhai Rd., Hefei, 230026, China
2 Henan International Joint Laboratory of Structural Mechanics and Computational Simulation, Huanghuai University, No.
76 Kaiyuan Rd., Zhumadian, 463000, China
3 College of Energy Engineering, Huanghuai University, No. 76 Kaiyuan Rd., Zhumadian, 463000, China
* Corresponding Author: Baojin Chu. Email:
The International Conference on Computational & Experimental Engineering and Sciences 2023, 26(4), 1-1. https://doi.org/10.32604/icces.2023.09199
Abstract
Generally, film dielectric materials often exhibit size-dependent structure and electric properties. In this
work, we demonstrate a similar behavior in bulk Na
0.5Bi
0.5TiO
3 (NBT)-based polycrystalline ceramics.
According to the results from X-ray diffraction, the (Na
0.5Bi
0.5)
0.92Ba
0.08Ti
0.99Mg
0.01O
2.99 (NBT8M1.0) ceramic
showed a complex structure that consists of rhombohedral, tetragonal and cubic symmetries. We found,
when decreasing the thickness of a
ϕ 10 mm NBT8M1.0 ceramic from 1230 μm to 230 μm, the ceramic
showed increased content of cubic symmetry (CC) from 28% to 56%. Meanwhile, the piezoelectric response
(
d33) increased from 107 pC/N to 134 pC/N and the depolarization temperature (
Td) decreased from 170 ℃
to 142 ℃. Similarly, when decreasing the diameter of a 1 mm thick NBT8M1.0 ceramic from
ϕ 22 mm to
ϕ 6
mm, the ceramic showed increased CC from 18% to 44%. Meanwhile, the d33 increased from 125 pC/N to
135 pC/N and the
Td decreased from 165 ℃ to 156 ℃. The origin of size-dependent structure and properties
in macroscopic size range of NBT8M1.0 ceramics were further studied by investigating the difference of the
size-dependence between the ceramics sintered from green bodies prepared by uniaxial pressing and
isostatic pressing. The results demonstrated that the size-dependent structure and properties of NBT-based
polycrystalline ceramics are closely related to the residual stress from the inhomogeneous densification during sintering process, as a result of the inhomogeneous density distribution in the pressed green body.
Keywords
Cite This Article
APA Style
Chen, P., Chu, B. (2023). Size dependent structures and properties of na<sub>0.5</sub>bi<sub>0.5</sub>tio<sub>3</sub>-based ceramics for piezoelectric sensors. The International Conference on Computational & Experimental Engineering and Sciences, 26(4), 1-1. https://doi.org/10.32604/icces.2023.09199
Vancouver Style
Chen P, Chu B. Size dependent structures and properties of na<sub>0.5</sub>bi<sub>0.5</sub>tio<sub>3</sub>-based ceramics for piezoelectric sensors. Int Conf Comput Exp Eng Sciences . 2023;26(4):1-1 https://doi.org/10.32604/icces.2023.09199
IEEE Style
P. Chen and B. Chu, "Size Dependent Structures and Properties of Na<sub>0.5</sub>Bi<sub>0.5</sub>TiO<sub>3</sub>-Based Ceramics for Piezoelectric Sensors," Int. Conf. Comput. Exp. Eng. Sciences , vol. 26, no. 4, pp. 1-1. 2023. https://doi.org/10.32604/icces.2023.09199