The effect of grain size on the radiation property of thermochromic material

The effects of the mean particle size of raw material and sintering temperature on the grain size of the block perovskite manganese oxide were studied. The effects of the grain size of the samples on the radiation properties of the thermochromic materials were discussed. The measured results show that the grain size of the perovskite manganese oxide is almost not changed with the different particle size of raw material under the same sintering temperature. The grain size of the perovskite manganese oxide increases with the sintering temperature for the same particle size of raw material. It is also found that the changing range of the emittance of thermochromic material increases with the grain size of the samples. But the transition temperature of thermochromic material is not changed with grain size.