Thermal conductivity of amorphous silica nanoparticles
Source abstract
Abstract
Understanding the heat transfer through confined systems at nanometer scale is of both scientific interest and technical importance. We report in this paper, a case study on the thermal conductivity of amorphous silica nanoparticles. It is found that the solid-state thermal conductivity of amorphous silica nanoparticles is size-dependent and can be quantitatively calculated by using a phenomenological theory. The observed size effect on thermal conductivity of silica nanoparticles is however not significant, mostly due to the very small phonon mean free path of amorphous silica, l0 = 0.59 nm. It is also found that the phonon-defect scattering at the nanoparticle surfaces has a predominate effect on the involved heat transfer process. The calculated thermal conductivity of 5-nm silica nanoparticles is about 0.539 W/(mK).
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Thermal properties of materials · Thermal Radiation and Cooling Technologies · Advanced Thermoelectric Materials and Devices
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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