由于随球磨时间增加样品介电常数下降，使得阻抗匹配变好，样品的微波吸收性能提升。
As dielectric constant of samples decreases with increasing the ball milling time, impedance matching becomes better and the performances of microwave absorption are promoted.
由于随球磨时间增加样品介电常数下降，使得阻抗匹配变好，样品的微波吸收性能提升。
As dielectric constant of samples decreases with increasing the ball milling time, impedance matching becomes better and the performances of microwave absorption are promoted.
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