| Heat energy storage technique can solve the mismatch of energy supply and demand. It is an effective measure to improve energy utilization efficiency and protect environment for lack of energy resource. Research workers pay much attention to the technique that makes full use of phase change materials'(PCMs) latent heat to store heat energy for its high heat storage density and its isothermal process in melting and freezing.In this paper, a new type salt/ceramic composite energy storage material(CESM) is fabricated successfully by applying an innovating technology firstly which is molten Na2S)4 infiltrating porous ceramics performs spontaneously. This material which composed of sensible ceramic heat storage materials and molten salt latent heat storage materials integrates their advantages and overcomes their disadvantages. In the process of energy storage, this material can exchange heat by contacting directly with compatible fluid, so the efficiency of exchanging heat is improved greatly.The conditions of thermodynamics and statics and the kinetics model of molten salt infiltrating porous ceramics performs are established. Influence factors of infiltrating process are ascertained theoretically and their correlation is analyzed. A whole system info of molten salt infiltrating porous performs spontaneously is formed. In experimentation, powder of quartz is used for main raw material and starch is used for pore forming material. Through half-dry press molding, 1200-1300 °C sintering, a three-dimensional network structural porous ceramics performs is fabricated successfully that porosity is 40-50%, pore size is 5-40 μ m and average pore size is 26-30 μ m. It is feasible completely that these performs are used for later infiltrating research.High temperature chemical compatibility and wetting between molten Na2SO4 and quartz are analyzed. Through infiltrating experiment, a new NaSO4/SiO2 CESM is fabricated successfully that infiltration percentage is 42.3-53.4% and relative...
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