2020 年 67 巻 6 号 p. 343-348
As a method of combining ceramics and metal, a molten metal stirring method, a pressure impregnation method, have been reported. However, since these methods use a molten metal, high-temperature conditions are indispensable, being production methods with high environmental loads. Our laboratory has developed a “non-firing sintering process” that can produce high-density solids by drying at ultra-low temperatures below 100°C (373 K). In this study, by using this process, a low-melting-point alloy with a melting point of 83°C (356 K) is combined with silica powder in a solid state, so that the low-temperature exhaust heat below 100°C (373 K), which is currently discarded, can be stored. In addition, an attempt was made to produce a solidified material having high strength and low-temperature heat storage ability with low environmental load by using silica particles as reinforcing particles. The obtained solidified body has excellent low-temperature heat storage capacity, and succeeded in suppressing the leakage of the low-melting alloy during the phase transition.