Yasir Abbas, M. Kamran, Haroon Mazhar, M. Anis-ur-Rehman
{"title":"Correlation of Structure and Transport Properties of Bi2Ca2−xLaxCoO6 Nanoparticles Synthesized by Coprecipitation Method","authors":"Yasir Abbas, M. Kamran, Haroon Mazhar, M. Anis-ur-Rehman","doi":"10.1007/s11664-025-12366-9","DOIUrl":null,"url":null,"abstract":"<div><p>In this work, the frequency-dependent conduction mechanism and dielectric relaxation processes in Bi<sub>2</sub>Ca<sub>2−<i>x</i></sub>La<sub><i>x</i></sub>CoO<sub>6,</sub> <i>x</i> = 0.00−0.15 (BCLCO), were investigated at temperatures between 100°C and 500°C. In this study, the novel BCLCO was successfully prepared by the coprecipitation process. We revealed the samples under study have a monoclinic structure by the investigation of x-ray diffraction (XRD) data. The XRD data was used to compute the crystallite size, lattice parameters, and unit cell volume. It is evident from all of the characterizations that the BCLCO was successfully prepared. Electrical and dielectric properties were examined with frequency at different temperatures. According to the analysis of electrical conductivity, the prepared samples exhibit semiconducting behavior. The dielectric constant is enhanced with temperature and decreases with frequency due to space charge polarization, which has been described by the Maxwell–Wagner relaxation model. In this investigation, the dielectric constant was examined up to a maximum value of 2.17 × 10<sup>6</sup>. In the studied samples, the Havriliak–Negami model was employed to calculate the spreading factor values. Jonscher’s universal power law was used to study the conduction mechanism of the synthesized samples. tan <i>δ</i> and dielectric constant studies confirmed the thermal hopping of charge transport in BCLCO. According to modulus spectroscopy, the examined samples indicated the existence of a temperature-dependent relaxation mechanism. The thermal conductivity (<i>k</i> = 0.540 W/m-K) was greatly reduced by La-doped bismuth cobaltite, which could make it appropriate for thermal barrier coating.</p><h3>Graphical Abstract</h3>\n<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":626,"journal":{"name":"Journal of Electronic Materials","volume":"54 11","pages":"9700 - 9713"},"PeriodicalIF":2.5000,"publicationDate":"2025-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Electronic Materials","FirstCategoryId":"5","ListUrlMain":"https://link.springer.com/article/10.1007/s11664-025-12366-9","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ENGINEERING, ELECTRICAL & ELECTRONIC","Score":null,"Total":0}
引用次数: 0
Abstract
In this work, the frequency-dependent conduction mechanism and dielectric relaxation processes in Bi2Ca2−xLaxCoO6,x = 0.00−0.15 (BCLCO), were investigated at temperatures between 100°C and 500°C. In this study, the novel BCLCO was successfully prepared by the coprecipitation process. We revealed the samples under study have a monoclinic structure by the investigation of x-ray diffraction (XRD) data. The XRD data was used to compute the crystallite size, lattice parameters, and unit cell volume. It is evident from all of the characterizations that the BCLCO was successfully prepared. Electrical and dielectric properties were examined with frequency at different temperatures. According to the analysis of electrical conductivity, the prepared samples exhibit semiconducting behavior. The dielectric constant is enhanced with temperature and decreases with frequency due to space charge polarization, which has been described by the Maxwell–Wagner relaxation model. In this investigation, the dielectric constant was examined up to a maximum value of 2.17 × 106. In the studied samples, the Havriliak–Negami model was employed to calculate the spreading factor values. Jonscher’s universal power law was used to study the conduction mechanism of the synthesized samples. tan δ and dielectric constant studies confirmed the thermal hopping of charge transport in BCLCO. According to modulus spectroscopy, the examined samples indicated the existence of a temperature-dependent relaxation mechanism. The thermal conductivity (k = 0.540 W/m-K) was greatly reduced by La-doped bismuth cobaltite, which could make it appropriate for thermal barrier coating.
期刊介绍：
The Journal of Electronic Materials (JEM) reports monthly on the science and technology of electronic materials, while examining new applications for semiconductors, magnetic alloys, dielectrics, nanoscale materials, and photonic materials. The journal welcomes articles on methods for preparing and evaluating the chemical, physical, electronic, and optical properties of these materials. Specific areas of interest are materials for state-of-the-art transistors, nanotechnology, electronic packaging, detectors, emitters, metallization, superconductivity, and energy applications.
Review papers on current topics enable individuals in the field of electronics to keep abreast of activities in areas peripheral to their own. JEM also selects papers from conferences such as the Electronic Materials Conference, the U.S. Workshop on the Physics and Chemistry of II-VI Materials, and the International Conference on Thermoelectrics. It benefits both specialists and non-specialists in the electronic materials field.
A journal of The Minerals, Metals & Materials Society.
求助内容：
应助结果提醒方式：
京公网安备 11010802042870号
