EFFECTS OF FINITE ABSORPTION DEPTH AND INFRARED DETECTOR NONLINEARITY ON THERMAL-DIFFUSIVITY MEASUREMENT OF THIN-FILMS USING THE FLASH METHOD

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	EFFECTS OF FINITE ABSORPTION DEPTH AND INFRARED DETECTOR NONLINEARITY ON THERMAL-DIFFUSIVITY MEASUREMENT OF THIN-FILMS USING THE FLASH METHOD
	D. W. Tang; G. H. He; B. L. Zhou; H. Zhang
	1995
发表期刊	Review of Scientific Instruments
ISSN	0034-6748
卷号	66 期号:8 页码:4249-4253
摘要	The flash method including the single- and double-ended method has gained widespread acceptance for measuring thermal diffusivity of thick foils (in millimeters) as well as thin films (in microns). However when the method is employed, some basic experimental conditions are assumed. In this paper, two of the assumptions, the finite absorption depth effect and the nonlinearity of the detector, are discussed in the situation of thin film samples. For the first one, the deviation of the factor omega(1/2) (=pi(2) alpha t(1/2)/L(2)) from 1.37 and the corresponding errors in deriving thermal diffusivity from t(1/2) are discussed for various relative absorption depth delta. The result indicates criteria for the method to be available, that is, L>10 delta and L>14 delta for the double- and the single-ended method. For the second one, by considering the errors in voltage output of a (Hg, Cd)Te IR detector, how the factor omega(1/2) deviates from 1.37 and the corresponding errors in thermal diffusivity measurement under various initial temperature conditions are discussed. The results are shown graphically and tabulated. (C) 1995 American Institute of Physics.
部门归属	acad sinica,inst met res,shenyang 110015,peoples r china. acad sinica,int ctr mat phys,shenyang 110015,peoples r china. liaoning inst city construct,shenyang 110015,peoples r china.
关键词	Radiometry Pulse
URL	查看原文
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/38674
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	D. W. Tang,G. H. He,B. L. Zhou,et al. EFFECTS OF FINITE ABSORPTION DEPTH AND INFRARED DETECTOR NONLINEARITY ON THERMAL-DIFFUSIVITY MEASUREMENT OF THIN-FILMS USING THE FLASH METHOD[J]. Review of Scientific Instruments,1995,66(8):4249-4253.
APA	D. W. Tang,G. H. He,B. L. Zhou,&H. Zhang.(1995).EFFECTS OF FINITE ABSORPTION DEPTH AND INFRARED DETECTOR NONLINEARITY ON THERMAL-DIFFUSIVITY MEASUREMENT OF THIN-FILMS USING THE FLASH METHOD.Review of Scientific Instruments,66(8),4249-4253.
MLA	D. W. Tang,et al."EFFECTS OF FINITE ABSORPTION DEPTH AND INFRARED DETECTOR NONLINEARITY ON THERMAL-DIFFUSIVITY MEASUREMENT OF THIN-FILMS USING THE FLASH METHOD".Review of Scientific Instruments 66.8(1995):4249-4253.