흑연표면의 열방사율 측정시 결정립 배향성의 영향
Thermal Emissivity Changes as a Function of Degree of Flakes Alignment on the Graphite Surface
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초록
This study is the research on the thermal emissivity depending on the bulk graphite's alignment degree. Bulk graphites were manufactured by uni-axial pressing and subsequent heat treatment of natural graphite flakes with organic binder. The samples were prepared to be 0(relative to the 002 c-face), 45˚ and 90˚(relative to the 100 a-face) for measuring alignment degree. The alignment degree of the sample was measured by XRD. The thermal emissivity was measured by infrared thermal image camera at 100℃ and compared with the value obtained by Infrared spectroscopy. The alignment degree and thermal emissivity of 0sample were measured to be 0 and 0.70 respectively. And those of 90˚sample were 0.73 and 0.80 respectively. The emissivity value was correlated with obtained by IR spectroscopy. Therefore it was considered that the thermal emissivity of the bulk graphite is correlated with the alignment degree.
Abstract
This study is the research on the thermal emissivity depending on the bulk graphite's alignment degree. Bulk graphites were manufactured by uni-axial pressing and subsequent heat treatment of natural graphite flakes with organic binder. The samples were prepared to be 0(relative to the 002 c-face), 45˚ and 90˚(relative to the 100 a-face) for measuring alignment degree. The alignment degree of the sample was measured by XRD. The thermal emissivity was measured by infrared thermal image camera at 100℃ and compared with the value obtained by Infrared spectroscopy. The alignment degree and thermal emissivity of 0sample were measured to be 0 and 0.70 respectively. And those of 90˚sample were 0.73 and 0.80 respectively. The emissivity value was correlated with obtained by IR spectroscopy. Therefore it was considered that the thermal emissivity of the bulk graphite is correlated with the alignment degree.
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