A composition and method for enhancing the thermal conductivity in heat transfer systems. The composition comprises a powder having average particle sizes in the nanometer to micron size range, a coating for imparting corrosion resistance and/or acting as a dispersant, and a heat transfer medium. The heat transfer medium is selected from the group of interpolymers, polymers, gaseous and liquid fluids, and phase change materials. Suitable powders include metals and metal oxides, alloys or blends thereof, and carbon derivatives. The surface of the powder is modified by surface complexes or physical adsorption with a coating compound. The coated powder, when mixed with a heat transfer medium, forms a colloidal dispersion which exhibits enhanced heat transfer capacity and thermal conductivity, stable chemical composition, faster heat transfer rates, and dispersion maintenance which are beneficial to most heat transfer systems.
一种用于提高传热系统导热性能的组合物和方法。该组合物包括平均粒径在纳米至微米范围内的粉末、赋予耐腐蚀性和/或用作分散剂的涂层以及传热介质。传热介质选自中间聚合物、聚合物、气态和液态流体以及相变材料。合适的粉末包括
金属和金属氧化物、合
金或其混合物以及碳衍
生物。粉末表面通过表面络合物或与涂层化合物的物理吸附进行改性。
涂层粉末与传热介质混合后形成胶体分散体,具有更强的传热能力和热传导性、稳定的
化学成分、更快的传热速率以及对大多数传热系统有益的分散稳定性。