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首页> 外文期刊>Pramana >Effect of porosity and pore morphology on the low-frequency dielectric response in sintered ZrO2-8 mol% Y2O3 ceramic compact
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Effect of porosity and pore morphology on the low-frequency dielectric response in sintered ZrO2-8 mol% Y2O3 ceramic compact

机译：孔隙和孔隙形态对ZrO2-8 mol％Y2O3烧结陶瓷烧结体低频介电响应的影响

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摘要

Effect of porosity and pore size distribution on the low-frequency dielectric response, in the range 0.01-100 kHz, in sintered ZrO2-8 mol% Y2O3 ceramic compacts have been investigated. Small-angle neutron scattering (SANS) technique has been employed to obtain the pore characteristics like pore size distribution, specific surface area etc. It has been observed that the real and the imaginary parts of the complex dielectric permittivity, for the specimens, depend not only on the porosity but also on the pore size distribution and pore morphology significantly. Unlike normal Debye relaxation process, where the loss tangent vis-??-vis the imaginary part of the dielectric constant shows a pronounced peak, in the present case the same increases at lower frequency region and an anomalous non-Debye type relaxation process manifests.
机译：在烧结ZrO2-8 mol％Y2O3陶瓷压块中，研究了孔隙率和孔径分布对低频介电响应（在0.01-100 kHz之间）的影响。小角度中子散射（SANS）技术已被用于获得孔隙特征，如孔径分布，比表面积等。已观察到，样品的复介电常数的实部和虚部不依赖于不仅在孔隙率上，而且在孔径分布和孔隙形态上都显着。与正常的德拜弛豫过程不同，在介电常数的虚部上损耗正切相对于介电常数的虚部显示出明显的峰值，在当前情况下，低频处的损耗正切增加，并且出现了异常的非德拜弛豫过程。

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