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  • 1 Kyoto Electronics Manufacturing Co. Ltd. (KEM) Kyushu Laboratory 1-2 Nakabarushinmachi Tobata-ku, Kitakyushu, Fukuoka 804-0003 Japan 1-2 Nakabarushinmachi Tobata-ku, Kitakyushu, Fukuoka 804-0003 Japan
  • | 2 National Research Laboratory of Metrology (NRLM) 1-1-4 Umezono Tsukuba, Ibaraki 305-8563 Japan 1-1-4 Umezono Tsukuba, Ibaraki 305-8563 Japan
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Abstract  

We have developed a laser flash apparatus for simultaneous measurements of thermal diffusivity and specific heat capacity of solid materials by introducing recent technical progress: uniform heating by a homogenized laser beam using an optical fiber with a mode mixer, measuring transient temperature of a specimen with a calibrated radiation thermometer, analyzing a transient temperature curve with a curve fitting method, to achieve differential laser flash calorimetry. Thermal diffusivity, specific heat capacity and thermal conductivity of glassy carbon and molybdenum were measured in the temperature range from 300 to 1100 K.