掺杂石墨烯纳米片对硝酸熔盐比热容的影响

Specific Heat Capacity of Molten Nitrate Salt-based Graphene Nanoplatelets Nanofluids

以硝酸钠、硝酸钾和亚硝酸钠组成的三元熔盐为基液,制备了掺杂石墨烯纳米片的混合熔盐.采用差示扫描量热法测量了基液和混合熔盐纳米流体的比热容,研究了石墨烯纳米片的质量浓度对硝酸熔盐比热容的影响.结果表明,当石墨烯纳米片质量分数为1%时,熔盐纳米流体的比热容可提高7.5%.

Ternary molten salts consisting of sodium nitrate, potassium nitrate and sodium nitrite are used as the base material for the graphene nanoplatelets. Different scanning calorimetry is employed to measure the specific heat capacity for both base material and resultant nanofluids. The effect of concentration of nanoparticles on the specific heat capacity of molten nitrate salt-based nanofluids is investigated. The results show that a maximum enhancement of specific heat capacity of 7.5 % is found at an optimal concentration of 1% of graphene nanoplatelets.