{"title":"Electrical characterization of lead-modified bismuth borovanadate glasses","authors":"","doi":"10.1016/j.cap.2024.09.008","DOIUrl":null,"url":null,"abstract":"<div><div>Specifically, the study looks into dielectric characteristics (<span><math><mrow><msup><mi>ε</mi><mo>′</mo></msup><mtext>and</mtext><mspace></mspace><msup><mi>ε</mi><mo>″</mo></msup></mrow></math></span>) and complex modulus formulation and AC conductivity of lead-modified bismuth borovanadate glasses (50-x) V<sub>2</sub>O<sub>5</sub>-40 B<sub>2</sub>O<sub>3</sub>-10 Bi<sub>2</sub>O<sub>3</sub>-xPbO, where x = 5,10, 15, 20 and 25 mol% with sample ID's VPb1, VPb2, VPb3, VPb4 & VPb5 according to different compositions of lead and vanadate. When the PbO content rises, there is a decreasing tendency in both the alternating current conductivity and dielectric constants. In order to fit AC conductivity data, Almond West equation is used to extract parameters, including crossover frequency (<span><math><mrow><msub><mi>ω</mi><mi>H</mi></msub></mrow></math></span>), frequency exponent (s), and direct current conductivity (<span><math><mrow><msub><mi>σ</mi><mrow><mi>d</mi><mi>c</mi></mrow></msub><mo>)</mo></mrow></math></span>. Direct current conduction mechanism in all glass samples except VPb5 [Correlated Barriers Hopping (CBH) conduction at all frequencies] at lower frequencies might potentially be attributed to large-polaron quantum mechanical tunneling (LQMT). Similar to this, at high frequencies, small polaron quantum mechanical tunnelling is followed by VPb2 & VPb3 while LQMT is followed by VPb1 & VPb4. Activation energy of dc conduction (<span><math><mrow><msub><mi>E</mi><mtext>dc</mtext></msub></mrow></math></span>) at higher frequencies (0.373–0.476 eV) for samples having sample ID VPb1 to VPb4 and sample VPb5 at all frequencies with <span><math><mrow><msub><mi>E</mi><mtext>dc</mtext></msub></mrow></math></span> 0.686 eV and modulus activation energy <span><math><mrow><mo>(</mo><msub><mi>E</mi><mi>R</mi></msub><mo>)</mo></mrow></math></span> (0.382–0.534 eV) are found in good agreement. Dielectric studies reveal non-Debye-type behaviour.</div></div>","PeriodicalId":11037,"journal":{"name":"Current Applied Physics","volume":null,"pages":null},"PeriodicalIF":2.4000,"publicationDate":"2024-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Current Applied Physics","FirstCategoryId":"101","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1567173924002086","RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
Specifically, the study looks into dielectric characteristics () and complex modulus formulation and AC conductivity of lead-modified bismuth borovanadate glasses (50-x) V2O5-40 B2O3-10 Bi2O3-xPbO, where x = 5,10, 15, 20 and 25 mol% with sample ID's VPb1, VPb2, VPb3, VPb4 & VPb5 according to different compositions of lead and vanadate. When the PbO content rises, there is a decreasing tendency in both the alternating current conductivity and dielectric constants. In order to fit AC conductivity data, Almond West equation is used to extract parameters, including crossover frequency (), frequency exponent (s), and direct current conductivity (. Direct current conduction mechanism in all glass samples except VPb5 [Correlated Barriers Hopping (CBH) conduction at all frequencies] at lower frequencies might potentially be attributed to large-polaron quantum mechanical tunneling (LQMT). Similar to this, at high frequencies, small polaron quantum mechanical tunnelling is followed by VPb2 & VPb3 while LQMT is followed by VPb1 & VPb4. Activation energy of dc conduction () at higher frequencies (0.373–0.476 eV) for samples having sample ID VPb1 to VPb4 and sample VPb5 at all frequencies with 0.686 eV and modulus activation energy (0.382–0.534 eV) are found in good agreement. Dielectric studies reveal non-Debye-type behaviour.
期刊介绍:
Current Applied Physics (Curr. Appl. Phys.) is a monthly published international journal covering all the fields of applied science investigating the physics of the advanced materials for future applications.
Other areas covered: Experimental and theoretical aspects of advanced materials and devices dealing with synthesis or structural chemistry, physical and electronic properties, photonics, engineering applications, and uniquely pertinent measurement or analytical techniques.
Current Applied Physics, published since 2001, covers physics, chemistry and materials science, including bio-materials, with their engineering aspects. It is a truly interdisciplinary journal opening a forum for scientists of all related fields, a unique point of the journal discriminating it from other worldwide and/or Pacific Rim applied physics journals.
Regular research papers, letters and review articles with contents meeting the scope of the journal will be considered for publication after peer review.
The Journal is owned by the Korean Physical Society.