Abstract

Aluminum borate whisker with different ratios (20wt%, 30wt%, 40wt%, 50wt%, 70wt%) was added to the aluminum phosphate matrix. The composite was sintered at 750 ℃ -1400 ℃ temperature, then the dielectric constant ( e ) and the dielectric loss tangent (tan δ ) of the composite was measured. The results show that when the whisker content is the same, the dielectric constant of the sample increases with increasing of relative density, but the dielectric loss decreases with increasing of relative density. The dielectric loss of the composite is mainly caused by the relaxation polarization.

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