Study on modification of ternary carbonates with additives

摘要

In order to improve the thermal physical properties of ternary carbonates, potassium, lithium, and sodium carbonates were modified by adding additives CaO, CaCO3, Ca(OH)2 and KOH. Their melting point, initial crystallization point, and decomposition temperature were analyzed by using the Synchronous Thermal Analyzer. Although the additives have less influence on the initial crystallization temperatures and the decomposition temperatures of ternary carbonates, they have different effects on the melting point of ternary carbonates. For concentrating solar power, KOH could be a good candidate of practical additive to expand the work temperature range of ternary carbonates by reducing melting point in a great extent.