γ-Fe_2O_3/EG纳米流体热输运性质的研究  

Study on the Thermal Transport Properties of γ-Fe_2O_3/EG Nanofluids

作　　者：郭守柱[1] 黎阳[2] 谢华清[2] 姜继森[1] 

机构地区：[1]华东师范大学物理系纳米功能材料与器件应用中心,上海200062 [2]上海第二工业大学城市建设与环境工程学院,上海201209

出　　处：《材料导报》2010年第4期30-32,共3页Materials Reports

基　　金：国家863课题(2006AA05Z232);上海市科委纳米专项(0852nm03200)

摘　　要：选用乙二醇(EG)为基液,运用两步法制得稳定性良好的γ-Fe2O3纳米流体。测量并研究了γ-Fe2O3纳米流体的导热系数和粘度等热输运性质。结果表明,γ-Fe2O3纳米粒子的加入使得纳米流体的导热系数较基液提高了,纳米流体的粘度在低温下较大,并随着温度的升高而减小,纳米流体在强化传热领域有着潜在的应用前景。Nanofluids containing γ-Fe2O3 nanoparticles are prepared using a two-step method with the ethylene glycol（EG） as the base fluid. The thermal transport properties including the thermal conductivity（TC） and the viscosity of the nanofluids are measured. The experimental results show that the TC increases with the addition of γ-Fe2O3 nanoparticles. The viscosity of the nanofluid has a higher value at lower temperature. As the temperature increases, the viscosity appears decreasing tendency. It is indicated that nanofluids have a potential application prospect in the field of heat transfer enhancement.

关 键 词：γ-Fe2O3纳米粒子纳米流体导热系数 

分 类 号：TB383[一般工业技术—材料科学与工程] TK124[动力工程及工程热物理—工程热物理]