Ahlawat Jyoti, Pawaria Suman, Redhu Preeti, Dahiya Sajjan, Ohlan Anil, Punia Rajesh, Maan A S
Department of Physics, Maharshi Dayanand University, Rohtak 124001, India.
Department of Applied Sciences, Chaudhary Ranbir Singh State Institute of Engineering and Technology, Jhajjar 124103, India.
J Chem Phys. 2023 Sep 14;159(10). doi: 10.1063/5.0166317.
The electrical conductivity of Na2O substituted zinc borate glasses has been studied in the frequency range of 10 mHz to 1 MHz and in the temperature range from 313 to 573 K. The conduction mechanism has been ascertained using the values of the frequency exponent (s) extracted from the fitting of experimental data of the real part of electric conductivity in light of the Almond-West equation. Depending on the glass composition, the ac conduction in the glasses happened via correlated barrier hopping and non-overlapping small polaron tunneling conduction models. The electric modulus studies support the assertion of composition dependent conduction mechanisms. Furthermore, electronic conduction and ionic conduction have been studied from impedance investigations. Equivalent circuit models were used to fit the Nyquist and Bode plots of each sample at the temperatures under consideration. It has been found that the activation energy values calculated from conductivity, electric modulus, and impedance measurements are more or less the same.
研究了Na2O取代的硼酸锌玻璃在10 mHz至1 MHz频率范围以及313至573 K温度范围内的电导率。根据阿尔蒙德 - 韦斯特方程，通过对电导率实部实验数据拟合得到的频率指数(s)值，确定了传导机制。根据玻璃成分，玻璃中的交流传导通过相关势垒跳跃和非重叠小极化子隧穿传导模型发生。电模量研究支持了传导机制与成分相关的论断。此外，通过阻抗研究对电子传导和离子传导进行了研究。使用等效电路模型对每个样品在考虑温度下的奈奎斯特图和博德图进行拟合。结果发现，由电导率、电模量和阻抗测量计算得到的活化能值大致相同。
