When f = 0.3%, the lattice thermal conductivity is the smallest, which is mainly due to (1) with the increase of the content, particles agglomerate, leading to the weakening of Rayleigh scattering, so that the lattice thermal conductivity increases. (2) At this time, the a value is the largest, indicating that the point defect is the largest and the lattice thermal conductivity is the smallest.<br>
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