Composite phase-change heat storage brick coated by refractory material
A technology of composite phase change and refractory materials, which is applied in the field of energy storage materials, can solve the problems of low strength of composite phase change heat storage materials, low utilization rate of energy storage materials, and decreased heat storage capacity, etc., and achieve a suitable operating temperature range , low price, increase the effect of heat loss
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[0028] Example 1
[0029] In this embodiment, the preparation process of the composite phase change heat storage material is the inorganic salt phase change material Na 2 CO 3 , The ceramic material MgO and carbon fiber are mixed according to the weight parts of 40 parts, 59.5 parts, and 0.5 parts, and then molded by 10MPa compression, and sintered at 900°C for 8 hours in a nitrogen atmosphere.
[0030] Refractory materials are made of calcium aluminate refractory cement, magnesia sand, silica powder, and flake graphite according to the weight of 10 parts, 60 parts, 20 parts, and 10 parts. After mixing, mix them in a small cement mortar mixer for 2 to 3 minutes. At the same time, slowly add water to make the water to material ratio 0.50. Coat the refractory material on the surface of the composite phase change heat storage material with a coating thickness of 30mm, natural curing for 3 days, and drying at 110°C for 24 hours.
[0031] In this example, the endothermic peak of the refr...
Example Embodiment
[0032] Example 2
[0033] In this embodiment, the preparation process of the composite phase change heat storage material is the inorganic salt phase change material Na 2 CO 3 (57wt%) and Li 2 CO 3 (43wt%) of eutectic salt, ceramic material MgO, and high thermal conductivity material flake graphite are mixed according to the weight parts of 40 parts, 59.5 parts, and 0.5 parts, and then pressed into molding at 10MPa and treated at 200°C for 24 hours.
[0034] Refractory materials are mixed with magnesium aluminate, magnesia, and flake graphite in parts by weight of 6, 89, and 5 parts by weight, then mix them in a small cement mortar mixer for 2 to 3 minutes, and slowly add 5 parts of water while stirring. . Coat the refractory material on the surface of the composite phase change heat storage material, the coating thickness is 20mm, the pressure is 200MPa, and it is dried at 180℃ for 48 hours.
[0035] In this example, the endothermic peak of the refractory-coated composite phase cha...
Example Embodiment
[0036] Example 3
[0037] In this embodiment, the preparation process of the composite phase change heat storage material is the inorganic salt phase change material Na 2 SO 4 , Ceramic material SiO 2 Powder and high thermal conductivity material flake graphite are mixed according to the weight parts of 40 parts, 59.5 parts, and 0.5 parts, and then pressed into a shape by 10MPa.
[0038] Refractory material made of MgCl 2 After mixing 2 parts, 93 parts and 5 parts by weight of magnesia and flake graphite, mix them in a small cement mortar mixer for 2 to 3 minutes, and slowly add 8 parts of water while stirring. Coat the refractory material on the surface of the composite phase change heat storage material, the coating thickness is 35mm, the pressure is 150MPa, and it is dried at 110°C for 48 hours.
[0039] In this example, the endothermic peak of the refractory-coated composite phase change heat storage brick appears at 882°C.
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