Fabrication and characterization of pyroelectric Ba0.8Sr0.2TiO3 thin films by a sol-gel process

被引：18

作者：

Cheng, JG ^{[1
]}

Tang, J

Meng, XJ

Guo, SL

Chu, JH

Wang, M

Wang, H

Wang, Z

机构：

[1] Chinese Acad Sci, Shanghai Inst Tech Phys, Natl Lab Infrared Phys, Shanghai 200083, Peoples R China

[2] Shandong Univ, Natl Lab Crystal Mat, Jinan 250100, Peoples R China

来源：

JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 2001年 / 84卷 / 07期

关键词：

D O I：

10.1111/j.1151-2916.2001.tb00854.x

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：

A sol-gel process was used to prepare pyroelectric Ba0.8Sr0.2TiO3 thin films with large columnar grains (100-200 nm in diameter) on Pt/Ti/SiO2/Si substrates, via using a 0.05M solution precursor. The relationship between dielectric constant and temperature (epsilon (r)-T) showed two distinctive phase transitions in the Ba0.8Sr0.2TiO3 thin films. Both the remnant polarization and the coercive field decreased as the temperature increased from -73 degreesC to 40 degreesC. Its low dissipation factor (tan delta = 2.6%) and high pyroelectric coefficient (p = 4.6 x 10(-4) C . (m(2).K)(-1) at 33 degreesC), together with its good insulating properties, made the prepared Ba0.8Sr0.2TiO3 thin films promising for use in uncooled infrared detectors and thermal imaging applications.

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页码：1421 / 1424

页数：4

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