双电光分子聚合物薄膜传感器.docVIP

电光聚合物薄膜传感器及其电光性能* 李悠1, 2, 3，张颖3 （1.哈尔滨电工仪表研究所，哈尔滨 150028；2.国家电工仪器仪表质量监督检验中心，哈尔滨 150028；3. 哈尔滨理工大学 电气与电子工程学院，哈尔滨 150080） 摘要：为了获得更高的电光系数，提升电光性能的同时又能兼备良好的热稳定性和相容性，以电光聚合物材料为主体，通过化学与物理相结合的方法，制备了两种新型双电光分子聚合物传感器。测试了传感器的电光性能，实验研究了掺杂比、极化温度对器件电光系数的影响。分析可知，电光系数随着掺杂比例的增加而变大，但是如果掺杂比例过高，电光系数随着掺杂比例的增加而减小。这是由于过高的掺杂比降低了聚合物的玻璃化温度，导致相分离现象在极化过程中发生。对传感器进行了取向排列稳定性测试，结果表明，介电弛豫在中仍然存在。然而由于电光聚合物自身具有较大电光系数，即使在介电弛豫出现后，仍然可以表现出较强的电光特性，是一种高效电光传感器件。 关键词：电光聚合物；薄膜；传感器；电光系数 中图分类号：TM93 文献标识码：A 文章编号：1001–1390（2016）17–0000–00 Polymer film sensor and its electro-optic properties Li You 1, 2, 3, Zhang Ying3 (1. Harbin Research Institute of Electrical Instrumentation, Harbin 150028, China. 2. National Quality Supervision and Inspection Center for Electrical Measuring Instruments, Harbin 150028, China. 3. College of Electronic Engineering, Harbin University of Science and Technology, Harbin 150080, China) Abstract: For the purpose of obtaining higher electro-optic (EO) coefficients, improving the electro-optic performance, as well as qualifying good thermal stability and compatibility, the novel double EO molecules polymer thin film sensors are prepared by mixing a small physical and chemical nonlinear optical (NLO) into the host polymer. The EO properties are tested after the poling process. The effect on the EO coefficients by the different mixing proportion and different poling temperature are analyzed in details. The results show that the EO coefficient increases as the mixing proportion becomes larger, but decreases while the mixing proportion is too high. The reason is that the glass transition temperature falls dramatically with a high mixing proportion, which leads to the phase separation during the poling process. The test of the sample orientation stability with a suitable mixing proportion is performed. Experimental results show that the double EO molecular polymer thin film possesses a considerable EO coefficient after being placed for a long time, although the dielectric relaxation