Abstract
The phase change heat storage technology with high temperature phase change heat storage materials as the heat storage medium is an efficient heat storage technology, which can play an important role in clean energy consumption, clean heating and so on. In this paper, the effects of several sintering additives on the microstructure angle of high temperature composite phase change heat storage materials were experimentally studied and characterized. The role of sintering additives such as lead, bismuth oxide and barium carbonate in the sintering process of composite phase change heat storage materials was analyzed by means of mechanical strength test and SEM. The results show that lead is conducive to the melting and surface wetting of magnesium oxide particles, and barium carbonate promotes the formation of sodium carbonate strip crystals to a certain extent, so as to improve the bonding strength of the material after sintering. Sodium silicate mainly plays the role of bonding, reducing the dispersion of components outside the pores and making the structure of the composite more complete.
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