Electrical Relaxation in Na2O·3SiO2 Glass
Electrical Relaxation in Na2O·3SiO2 Glass
复制标题
Na2O·3SiO2 玻璃中的电弛豫
DOI：
10.1111/j.1151-2916.1972.tb13413.x
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发表时间：
1972
影响因子：
3.9
通讯作者：
P. B. Macedo
中科院分区：
文献类型：
--
作者：
V. Provenzano;L. Boesch;V. Volterra;C. T. Moynihan;P. B. Macedo
研究了 Na2O·3SiO2 玻璃中与碱扩散相关的电弛豫，频率为 0.2 Hz 至 700 kHz，温度为 –1° 至 163°C。开发了一种用于分析导电电介质中的电弛豫的形式主义，该形式主义将电场的非指数衰减为零以及介电常数和电导率的分散与电场的弛豫时间分布联系起来，并且被证明与碱金属硅酸盐玻璃中电弛豫的当前分子理论定性一致。导出了Na2O·3SiO2玻璃的直流电导率、极限高频介电常数和平均电场或电导弛豫时间之间的关系，并通过实验验证了这一关系。玻璃的电场弛豫时间分布很宽，在对数尺度上不对称，并且倾向于较短的弛豫时间；分布随温度升高而变窄。生成了简化的电弛豫曲线，可用于比较 Na2O·3SiO2 玻璃中的电弛豫和机械弛豫。
The electrical relaxation associated with alkali diffusion in Na2O·3SiO2 glass was studied from 0.2 Hz to 700 kHz at –1° to 163°C. A formalism for analysis of electrical relaxation in conducting dielectrics which associates the nonexponential decay of the electric field to zero and the dispersions in the dielectric constant and the conductivity with a distribution of relaxation times for the electric field was developed and is shown to be in qualitative accord with current molecular theories of electrical relaxation in alkali silicate glasses. A relation between the dc conductivity, the limiting high-frequency dielectric constant, and the average electric field or conductivity relaxation time was derived and is verified experimentally for the Na2O·3SiO2 glass. The distribution of electric-field relaxation times for the glass is broad, asymmetric on a logarithmic scale, and weighted in favor of the shorter relaxation times; the distribution narrows with increasing temperature. A reduced electrical relaxation curve which can be used to compare electrical and mechanical relaxations in Na2O·3SiO2 glass was generated.