硫酸ランタン/膨張黒鉛系化学蓄熱材の熱伝導性と反応挙動の検討

抄録

The effective thermal conductivity was investigated for lanthanum sulfate hydrate/expanded graphite (La₂(SO₄)₃・xH₂O/EG) heat storage material. Moreover, reactivity of La₂(SO₄)₃・xH₂O was also investigated. The hydration number strongly depended on the atmosphere condition. The effective thermal conductivity of La₂(SO₄)₃・xH₂O/EG decreased with increasing content of La₂(SO₄)₃・xH₂O, and the effective thermal conductivity measured at around 33°C was slightly higher than that measured at around 116°C. Moreover, the effective thermal conductivity of La₂(SO₄)₃/EG was lower than that of La₂(SO₄)₃・xH₂O/EG at around 33°C. Furthermore, the chronological changes of hydration reactivity of La₂(SO₄)₃・H₂O was measured at 80°C.