非定常熱量法による金属の比熱と全半球ふく射率の同時測定法 : 第2報,円筒形試片による実験的検証
1994 年 60 巻 570 号 p. 523-529
詳細
1994 年 60 巻 570 号 p. 523-529
The specific heat c and total hemispherical emissivity εh of iron and constantan have been measured using the simultaneous-measurement method proposed in our previous report to verify the accuracy in the measurement. Cylindrical specimens, whose geometrical shape is presumed to be more appropriate than those in the previous report, are used as the compound specimens necessary for the method. To obtain more accurate results, an expression for the temperature versus time curve has been developed ; this expression is highly accurate over the entire temperature range. For iron, the measured c- and εh-values are compared with c-values recommended in CINDAS Data Series and with εh-values previously measured by H. Masuda and M. Higano, respectively. For constantan, empirical relations between c and T (temperature) and εh and T are obtained. Errors in the present results are analyzed and the total errors in the results are estimated.
