材料之種類繁多，產品於設計時，經常需考量材料之熱性質，以規劃熱途徑，而達到隔絕熱擴散或快速散熱之目的。本研究針對材料熱特性之熱傳導係數，建立一量測系統，經實驗及數值分析，進行材料熱傳導係數之預測。實驗部分以一薄膜式加熱片作為熱源，將熱源置於兩待測材料試片間，其間紀錄加熱片之溫度隨時間之變化與其輸出功率。將實驗量測之溫度數據，利用數值分析在不同熱傳導係數下，模擬加熱片之溫度分布。透過實驗結果與模擬之加熱片溫度變化，比較材料於暫態之熱傳行為，而求得其熱傳導係數。本量測系統用於高熱傳導係數之材料，其準確性較熱之不良導體高。

Material properties are essential to product designs. In order to reduce the heat loss or reach a rapid cooling state, it is necessary to put the thought of the thermal properties of materials into consideration. This research addresses the thermal conductivity of materials to build a measurement system. By the experiments and numerical analysis, it brings a prediction about the thermal conductivity of materials. In the experiment, a thin-film heater was been used as a heat source, and recorded the temperature change versus time and the average power output while placing the heater between two testing samples. According to the data from the experiment, the simulation of the temperature of the heaters due to different thermal conductivity results in the thermal conductivity required. Namely the thermal conductivity is obtained by comparing the simulation result and the temperature change of the heaters with the transient conduction from the materials. This system is good for measuring the thermal conductivity of bulk, and the higher values could have the better results.

[1] B. J. Filla, “A steady-state high-temperature apparatus for measuring thermal conductivity of ceramics,” Review of Scientific Instruments, Vol. 68, Issue 7, pp. 2822-2829, July 1997
[2] S. Chantasiriwan, “Steady-state determination of temperature-dependent thermal conductivity,” International Communications in Heat and Mass Transfer, Vol. 29, Issue 6, pp. 811-819, August 2002
[3] Sun Ming-Tsung and Chang Chin-Hsiang, “An accuracy analysis of the steady-state thermal conductivity measurement method with single constant temperature region,” Proceedings of the ASME Summer Heat Transfer Conference, Vol. 1, pp. 125-128, July 2003
[4] G. Labudova and V. Vozarova, “Uncertainty of the thermal conductivity measurement using the transient hot wire method,” Journal of Thermal Analysis and Calorimetry, Vol. 67, Issue 1, pp. 257-265, 2002
[5] S. E. Gustafsson, E. Karawacki and M. N. Khan, “Transient hot-strip method for simultaneously measuring thermal conductivity and thermal diffusivity of solids and fluids,” Journal of Physics D: Applied Physics, Vol.12, Issue 9, pp. 1411-1421, September 1979
[6] S. E. Gustafssont, E. Karawacki and M. A. Chohan, “Thermal transport studies of electrically conducting materials using the transient hot-strip technique,” Journal of Physics D: Applied Physics, Vol. 19, Issue 5, pp. 727-735, May 1986
[7] S. E. Gustafsson, E. Karawacki and M. A. Chohan, “Circuit design for transient measurements of electrical properties of thin metal films and thermal properties of insulating solids or liquids,” Review of Science Instruments, Vol. 55, Issue 4, pp. 610-613, April 1984
[8] T. Log, “Transient hot-strip (THS) method for measuring thermal conductivity of thermally insulating materials,” Fire and Materials, Vol. 17, Issue 3, pp. 131-138, 1993
[9] S. E. Gustafsson, “Transient plane source techniques for thermal conductivity and thermal diffusivity measurements of solid materials,” Review of Scientific Instruments, Vol. 62, Issue 3, pp. 797- 804, March 1991
[10] T. Log and S. E. Gustafsson, “Transient plane source (TPS) technique for measuring thermal transport properties of building materials,” Fire and Materials, Vol. 19, Issue 1 , pp. 43-49, August 1994
[11] M.A. Abdelrahman, S.M. Said, A. Ahmad, M. Inam, and H. Abul-Hamayel, “Thermal conductivity of some major building materials in Saudi Arabia,” Journal of Building Physics, Vol. 13, pp. 294-300, April 1990
[12] M. Gustavsson, E. Karawacki, and S. E. Gustafsson, “Thermal conductivity, thermal diffusivity and specific heat of thin samples from transient measurements with hot disk sensors,” Review of Science Instruments, Vol. 85, Issue 12, pp.3856-3859, December 1994
[13] M. Gustavsson, N. S. Saxena, E. Karawacki and S. E. Gustafsson, “Specific heat measurements with the hot disk thermal constants analyser,” Proceedings of the Twenty-three International Conference on Thermal Conductivity, Nashville, Tennessee, USA, pp. 56-65, October 1995
[14] V. Bohac, M. K. Gustavsson, L. Kubicar and S. E. Gustafsson,” Parameter estimations for measurements of thermal transport properties with the hot disk thermal constants analyzer,” Review of Scientific Instruments, Vol. 71, Issues 6, pp. 2452-2455, JUNE 2000
[15] Y. He, “Rapid thermal conductivity measurement with a hot disk sensor Part 1. Theoretical considerations,” Thermochimica Acta, Vol. 436, Issues 1-2, pp. 122-129, October 2005
[16] S. A. Al-Ajlan, “Measurements of thermal properties of insulation materials by using transient plane source technique,” Applied Thermal Engineering, Vol. 26, Issues 17-18, pp. 2184-2191, December 2006
[17] W. J. Parker, W. J. Jenkins, C. P. Butler and G. L. Abbott, “Flash method of determining thermal diffusivity, heat capacity and thermal conductivity,” Journal of Applied Physics, Vol. 32, Issue 9, pp. 1679-1684, September 1961
[18] L. Voz’ar and W. Hohenauer, “Uncertainty of Thermal Diffusivity Measurements Using the Laser Flash Method,” International Journal of Thermophysics, Vol. 26, Issue 6, pp. 1899-1915, November 2005
[19] L. M. Clark III and R. E. Taylor, “Radiation loss in the flash method for thermal diffusivity,” Journal of Applied Physics, Vol. 46, Issue 2, pp.714-719, February 1975
[20] 蔡豐欽, “熱傳遞,” 高立圖書有限公司, 1992
[21] Jack P. Holman, “Heat Transfer,” McGraw-Hill Education, 9th ed., 2002
[22] F. S. Tse and I. E. Morse, “Measurement and instrumentation in engineering,” Marcel Dekker, Inc1989
[23] 康淵,陳信吉, “ANSYS入門,” 全華科技圖書股份有限公司, 2002
[24] ANSYS User`s Manual, Release 10.0, 2005
[25] 小栗富士雄, 小栗達男, 黃癸森譯, “標準機械設計圖表便覽,”臺隆書店, 1990
[26] 機械工程手冊/電機工程手冊編輯委員會, “機械工程手冊 金屬材料,” 五南圖書出版股份有限公司, 2002