Cr-doped lead lanthanum zirconate titanate (PLZT) ceramics for pyroelectric and energy harvesting device applications

被引：16

作者：

Bajpai, K. K. ^{[1
]}

Sreenivas, K. ^{[2
]}

Gupta, Ajai K. ^{[3
]}

Shukla, A. K. ^{[1
]}

机构：

[1] Amity Univ Uttar Pradesh, Amity Inst Appl Sci, Dept Phys, Gb Nagar 201313, UP, India

[2] Univ Delhi, Dept Phys & Astrophys, Delhi 110007, India

[3] Guru Ghasidas Vishwavidyalaya, Dept Pure & Appl Phys, Bilaspur 495009, Chhattisgarh, India

来源：

CERAMICS INTERNATIONAL | 2019年 / 45卷 / 11期

关键词：

Ceramic materials; Pyroelectrics; X-ray diffraction; Raman spectra; Thermal detector; Energy harvesting; EFFECTIVE IONIC-RADII; X-RAY-DIFFRACTION; PIEZOELECTRIC PROPERTIES; ELECTROMECHANICAL PROPERTIES; FERROELECTRIC CERAMICS; RAMAN-SCATTERING; THIN-FILMS; MICROSTRUCTURE; LUMINESCENCE; RESISTIVITY;

D O I：

10.1016/j.ceramint.2019.04.111

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Cr-doped PLZT ceramic compositions (Pb0.94La0.06)(Zr0.57Ti0.43)O-3 + X mol% of Cr2O3, (X = 0.00, 0.05, 0.11 and 0.16) prepared by solid state reaction have been characterized for their structural and pyroelectric properties. Rietveld refinement of X-ray diffraction (XRD) data reveals tetragonal structure with space group P4mm, and the tetragonality ratio c/a increases with increasing Cr content. Raman spectroscopy reveals the coexistence of both rhombohedral and tetragonal phases in the system suggesting a polymorphic character providing easy rotation of polarization and improved pyroelectric response. Figures of merit (FOM) useful for device design have been estimated using the measured material properties such as pyroelectric current, density, specific heat, polarization, dielectric constant and loss. A specific Cr2O3 content of X = 0.11 in PLZT is found to exhibit optimum performance characteristics for pyroelectric and thermal energy harvesting applications.

引用

页码：14111 / 14120

页数：10

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