The real part and the imaginary part of solution( NMP-ethanol) permittivity was measured at different volume ratio at mi-crowave frequency in this paper. The result showed the real part and the imaginary part of the mixture solution permittivity at certain concentration was smaller than those of each of the components. The result showed the cluster structure of mixture solution at certain concentration had a significant effect on the permittivity of mixture solution. This result offered experimental evidence on the study of microwave chemistry.%本文通过测量微波频率下N-甲基吡咯烷酮和乙醇溶液在不同配比下的介电常数,发现N-甲基吡咯烷酮与乙醇溶液的介电常数的实部和虚部在特定浓度下小于任意单独一种物质介电常数.分析表明电介质溶液特定浓度下分子间团簇结构会影响溶液的介电常数.此结果为研究微波促进化学反应理论机理提供了实验依据.
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