Particle reinforced materials are widely used in many areas, including energy storage, energy saving, thermal protection, and thermal management. These applications tend to require an accurate foreknowledge of the effective thermal conductivity of these materials. Although there exist many different effective thermal conductivity models for this kind of materials, a general and accurate model for the composites reinforced by different types of spherical particles, including mono-particles, hybrid particles, and core-shell particles, is still lacking. This paper firstly collected some commonly used effective thermal conductivity models and tested their scope of use by numerical results. Then, a general and easy-to-use effective thermal conductivity model was provided by extending the model of Meredith and Tobias. This extended Meredith and Tobias's model was proven to be able to accurately predict the effective thermal conductivity of multi-phase composites reinforced by different types of spherical particles with large ranges of particle volume fraction and thermal conductivity ratio of particles to the matrix.

粒子增强材料广泛应用于许多领域，包括储能、节能、热保护和热管理。这些应用往往需要准确预知这些材料的有效热导率。尽管此类材料存在多种不同的有效导热模型，但仍缺乏针对不同类型球形颗粒（包括单颗粒、混合颗粒和核壳颗粒）增强复合材料的通用且准确的模型。本文首先收集了一些常用的有效导热模型，并通过数值结果检验了它们的使用范围。然后，通过扩展 Meredith 和 Tobias 的模型，提供了一个通用且易于使用的有效热导率模型。