Abstract

Electrical and dielectric properties of polycrystalline yttrium–iron garnet samples grown by the technology of radiation-thermal sintering in the fast electron beam are considered. In the frequency range from 25 Hz to 1 MHz, the normal complex permittivity, dielectric loss tangent, and ac conductivity spectra are measured. For comparison, in addition to frequency measurements, dc resistivity is measured. The temperature dependences of the above parameters are also measured at frequencies of 1 and 100 kHz in the temperature range of 25–300°C. The activation energies of the ac and dc conduction processes on the Arrhenius coordinates are determined by the temperature dependences of the conductivity. It is shown that as the sintering temperature increases from 1300 to 1450°C, the electrical parameters reach values characteristic of samples grown by conventional ceramic technology.

中文翻译：

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辐射热烧结技术生长的钇铁铁氧体石榴石多晶体的电和介电性能

摘要

考虑了通过快速电子束中的辐射热烧结技术生长的多晶钇铁石榴石样品的电学和介电性能。在25 Hz至1 MHz的频率范围内，测量了正常复介电常数，介电损耗角正切和交流电导率谱。为了进行比较，除了频率测量外，还测量了直流电阻率。在25–300°C的温度范围内，还在1 kHz和100 kHz的频率下测量了上述参数的温度依赖性。Arrhenius坐标上的交流和直流传导过程的激活能由传导率的温度依赖性决定。结果表明，随着烧结温度从1300升高到1450°C，