Thermal Conductivity of Graphite Microlattices

Technological advances in fabrication method have paved the path to achieve periodic metamaterials in the scale of micrometer and nanometer which enable us to manipulate the thermal and mechanical properties of the selected materials independently. While mechanical properties of these artificial lattices have been very well studied, their thermal properties have remained unaddressed. These architectural features will follow the combined behavior of design and material instead of following them individually. In this paper, we report the impact of controlling length and pitch sizes of microlattices that leads to a design space for desired thermal conductivity. The results are supported by the implementation of conventional Fuchs & Sondheimer (FS) size effect simulation on Matthiessen's rule following by several models on Effective Medium Theory (EMT) for capturing the volume fraction. By choosing carbon as our case study, we applied a material with a wide range of thermal conductivity in contemplation of elevating our design space.