著者らは、固体のの測定に熱流束型の示差走査熱量計を利用している。示差走査熱量測定では、標準試料（既知物質）の熱容量を比較用データにして、測定試料（未知物質）のをその熱容量と質量から間接的に決定することができる。しかも、測定に用いる試料はミリグラムオーダーの少量で良い。本研究では、が既知の純物質固体を測定試料に用い、示差走査熱量計による測定の信頼性について検討した。標準試料にはサファイアを用い、測定試料は銀およびモリブデンである。標準および測定試料はいずれも円板状で、その表面は良く研磨した。実験は、昇温速度を2, 5, 10および15 K/minと、また測定温度を室温から388 Kの範囲に設定し、繰り返しおこなった。

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高温における酸化物燃料の熱拡散率・測定における雰囲気制御，加熱炉構造及び非接触式温度計測に関する課題に関する検討結果、その製作とその機能確認に関して報告する。

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雰囲気制御型レーザフラッシュ式熱伝導率測定装置をグローブボックス内へ設置し，UO2等を用いての高温における及び熱拡散率の同時測定を行い，酸化物燃料に対する性能検証を実施した。

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This report describes a method for the estimation of the curing process of thermosets used for plastic-encapsulated ICs. This method consists of a thermal analysis by the differential scanning calorimetry (DSC) and an analysis of non-stationary heat conduction using the finite element method (FEM) coupled with the rate of heat evolution. The formula of the rate of heat evolution deduced from the DSC data could not be directly applied to the analysis because the thermodynamic conditions in DSC were not exactly the same as that in molding process, so that a state-dependent variable α were newly introduced to correct the formula. The temperature profiles at four positions in the cavity during cure were measured with CA-thermocouples. The α was determined by inverse solution of the FEM with the measured temperatures. The obtained variation of α is expressed by a function of time after the end of filling process and the conversion of resin. With making use of the α in the calculations of temperature, the predicted temperature profiles compare reasonably well with the experimental results. It is found that this method gives propriety of curing analysis including the effect of process parameters of α to estimate the solidification front.

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The problem regarding the change in thermal properties has come to occupy an important position in understanding various types of weathering. The present research pursues the evaluation of changes in specific heat capacity and volumetric heat capacity during rock weathering from a different angle. Two relationships for evaluating the changes of specific heat capacity and volumetric heat capacity in rock weathering have been derived theoretically from the values of some physical properties. The changes of specific heat capacity and volumetric heat capacity in rock during natural weathering are evaluated on the basis of the available data of densities, specific gravity, and water content in weathering profile.

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