Scholarlink

<p>A comprehensive conductivity spectroscopic study was conducted on the 60V<sub>2</sub>O<sub>5</sub>-20B<sub>2</sub>O<sub>3</sub>-(20-x)Bi<sub>2</sub>O<sub>3</sub>-xSrO, where x varied from 0 to 20, over an extensive frequency range (10<sup>−1</sup>&#xa0;−Hz–1&#xa0;MHz) and temperature range (373–473&#xa0;K), to elucidate the electrical conductivity behavior. The AC conductivity showed an increasing trend with addition of SrO up to 10&#xa0;mol.%; however, when SrO content reaches 15&#xa0;mol.% and 20&#xa0;mol.%, a decrease in conductivity is observed. By fitting the experimental AC conductivity data to the Almond-West model, key parameters such as direct current conductivity (<i>σ</i><sub>dc</sub>), crossover frequency (<i>ω</i><sub>H</sub>), and frequency exponent (s) has been obtained. Small polaron tunnelling and Correlated barrier hopping mechanisms were used to describe the AC conduction processes, depending on the glass composition. A good correlation is observed in the activation energy values obtained from conductivity (<i>E</i><sub>dc</sub>: 0.448–0.581 eV), modulus (<i>E</i><sub>R</sub>: 0.428–0.585 eV), and impedance(<i>E</i><sub>z</sub>: 0.436–0.594 eV) The dielectric studies exhibit non-Debye relaxation behaviour.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Examination of bismuth Borovanadate Glasses Modified by Alkaline Earth Oxide (SrO) in Terms of AC Conductivity and Dielectric Relaxation

  • 期刊论文

  • 发表日期：

    2025年5月21日

查看全文
  • Asha Rani,
  • Rajesh Parmar,
  • R. S. Kundu

摘要

A comprehensive conductivity spectroscopic study was conducted on the 60V2O5-20B2O3-(20-x)Bi2O3-xSrO, where x varied from 0 to 20, over an extensive frequency range (10−1 −Hz–1 MHz) and temperature range (373–473 K), to elucidate the electrical conductivity behavior. The AC conductivity showed an increasing trend with addition of SrO up to 10 mol.%; however, when SrO content reaches 15 mol.% and 20 mol.%, a decrease in conductivity is observed. By fitting the experimental AC conductivity data to the Almond-West model, key parameters such as direct current conductivity (σdc), crossover frequency (ωH), and frequency exponent (s) has been obtained. Small polaron tunnelling and Correlated barrier hopping mechanisms were used to describe the AC conduction processes, depending on the glass composition. A good correlation is observed in the activation energy values obtained from conductivity (Edc: 0.448–0.581 eV), modulus (ER: 0.428–0.585 eV), and impedance(Ez: 0.436–0.594 eV) The dielectric studies exhibit non-Debye relaxation behaviour.