硝酸熔盐的制备与物性研究

摘要

硝酸熔盐利用相变进行储热放热,可有效提高能源利用,对解决能源危机至关重要.制备了质量比为4:6的KNO3-NaNO3熔盐及同比例下不同质量分数的膨胀石墨/硝酸熔盐混合储热材料,并研究了混合储热材料的高温稳定性和腐蚀特性.结果表明,加入不同质量分数的膨胀石墨,混合储热材料的导热系数得到极大的提高,热稳定性略有降低,腐蚀性没有受到较大的影响.%The molten salt of nitric acid can utilize the phase change to store heat and release heat, which can effectively improve the effective utilization of energy and is very important to solve the en-ergy crisis.In this letter,KNO3-NaNO3molten salt and nitric acid molten salt/expanded graphite mixed heat storage material with a ratio of 4:6 were prepared,and the high temperature stability and corrosion properties of the heat storage material were studied.The results showed that with the addi-tion of different mass of expanded graphite,the thermal conductivity of the material has been greatly improved,and the corrosion are not greatly affected.