Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
598218 | Colloids and Surfaces A: Physicochemical and Engineering Aspects | 2006 | 4 Pages |
Abstract
Pyroelectric properties in alternating hemicyanine (DAEP)/nitrogencrown (NC) Langmuir-Blodgett (LB) films and effects of incorporating barium cations on pyroelectric behaviors have been investigated. Its pyroelectric coefficient measured is found to be 58 μC mâ2 Kâ1at 300 K. Their dielectric properties have been measured and used to determine the figures of merit in thermal devices. Relative permittivity (Ér) and dielectric loss values (tan δ) of pyroelectric films (in the range of 1-100 KHz) are found to be 2.34-1.96 and 0.08-0.04, respectively. These data give a maximum pyroelectric figure of merit of 150 μC mâ2 Kâ1 in the alternating LB films incorporating barium ions. The effects of different deposition on pyroelectric properties are also discussed in this paper.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Colloid and Surface Chemistry
Authors
Shihong Ma, Shuhong Li, Wencheng Wang, Genshui Wang, Jinglan Sun, Xiangjian Meng, Junhao Chu,