科研之友
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摘要
SrLaAlO4 ceramic samples were prepared via solid state reaction method. The low-frequency (20-10(7) Hz) dielectric properties were investigated in the temperature range from room temperature to 700 C-omicron. It was found that SrLaAlO4 shows intrinsic dielectric behavior with a dielectric constant of 13 in the temperature range below similar to 300 C-omicron. In the temperature range from 300 C-omicron to 560 C-omicron, the bulk dielectric contribution due to oxygen vacancy-related polarons dominates the dielectric properties of the samples. However, the dielectric properties are controlled by sample/electrode contacts when the temperature is risen to above 560 C-omicron. Our results indicate that the bulk effect instead of interfacial effect is the main contribution to dielectric loss in the lower temperature range.
