摘要
电子与微电子领域的发展极大地推动了导热聚合物薄膜材料的研究,然而适用于薄膜材料的导热性能分析技术及测试方法仍缺少系统研究。闪光法是最具代表性的瞬态法导热分析技术,本文系统介绍了闪光法的基本原理、测试条件以及适用范围等,并以导热聚酰亚胺薄膜材料为代表,详细分析了聚合物薄膜材料的厚度、表面质量、前处理条件、仪器参数设置以及数据分析处理等因素对测试结果的影响,并探讨了闪光法测试聚合物薄膜材料不同方向导热性能的应用。结果表明:样品的厚度准确性、表面质量、透明性均会影响测试结果,采取溅射镀金和喷涂石墨的预处理方法可有效提高测试准确性。同时,测试仪器的参数设置和数据处理方法会影响温度-时间曲线形状及拟合结果,需要根据聚合物薄膜样品的特性来选择适宜的测试条件。
The development in the field of electronics and microelectronics has greatly promoted the research on thermally conductive polymer film materials. However, there is a lack of systematic study on both the analyzing technology of thermal conductivity and the testing methods suitable for polymer films. The light/laser flash analysis(LFA) is the most representative method in transient analysis technique. In this paper, the basic principle, testing conditions and application scope of LFA method were systematically introduced. Thermally conductive polyimide films were taken as the representative examples to analyze the key factors on the testing results in detail, including the film thickness, surface quality, pretreatment conditions, instrument parameters, and data analyzing and processing. In addition, the application of LFA method for testing thermal conductivity along different directions of polymer film materials was further discussed. The results show that the thickness accuracy, surface quality, and transparency of the samples will affect the test results, and the pretreatment methods such as gold sputtering or graphite spraying can effectively improve the test accuracy. In addition, the parameter setting and data processing of the testing instrument will affect the shape of temperature-time curve and the fitting results. Thus, it is necessary to reasonably select the appropriate testing conditions according to the characteristics of polymer film samples.
作者
赵瑾
高梦岩
崔芃
陈宇迪
张梅
邹涛
翟磊
ZHAO Jin;GAO Mengyan;CUI Peng;CHEN Yudi;ZHANG Mei;ZOU Tao;ZHAI Lei(Institue of Analysis and Testing,Beijing Academy of Science and Technology(Beijing Center forPhysical&Chemical Analysis),Beijing Key Laboratory of Organic Materials Testing Technology&QualityEvaluation,Beijing 100089,China;Institute of Chemistry,Chinese Academy of Sciences,Beijing 100190,China)
出处
《绝缘材料》
CAS
北大核心
2023年第2期19-25,共7页
Insulating Materials
基金
北京市自然科学基金资助项目(2202068)。
关键词
测试方法
闪光法
聚合物薄膜
导热性能
testing method
light/laser flash analysis(LFA)
polymer film
thermal conductivity
