{"title":"溶胶凝胶法制备Ba0.95Bi0.05TiO3和Ba0.85Bi0.15TiO3陶瓷的介电弛豫","authors":"Nabiya Iqbal, Anju Dixit, Pramod S. Dobal","doi":"10.1007/s10832-025-00397-x","DOIUrl":null,"url":null,"abstract":"<div><p>In this work, bismuth doped barium titanate was synthesized by the sol– gel method. The samples were prepared using the chemical formula, Ba<sub>1 − x</sub>Bi<sub>x</sub>TiO<sub>3</sub> in which compositions corresponding to x = 0.05 and 0.15 i.e., Ba<sub>0.95</sub>Bi<sub>0.05</sub>TiO<sub>3</sub> (BBT5) and Ba<sub>0.85</sub>Bi<sub>0.15</sub>TiO<sub>3</sub> (BBT15), showed a relaxor - type behavior. The temperature and frequency dependent dielectric measurements, were made which clearly showed that the peak corresponding to the dielectric maxima shifted towards higher temperature as frequency is increased in both the cases. The calculated values of the index of relaxation and the broadening parameter from the linear fit of the experimental data which was plotted according to the modified Curie– Weiss law also supported this behavior. At 500 kHz, the index of relaxation was calculated as 1.61 and 1.43 for BBT5 and BBT15 respectively and the broadening parameter as 121.5 K and 96.9 K for BBT5 and BBT15 respectively. It was also concluded that lower concentration of bismuth (x = 0.05) showed a better performance as compared to that of the higher one.</p></div>","PeriodicalId":625,"journal":{"name":"Journal of Electroceramics","volume":"53 3","pages":"312 - 320"},"PeriodicalIF":2.6000,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Dielectric relaxation in Ba0.95Bi0.05TiO3 and Ba0.85Bi0.15TiO3 ceramics synthesized by sol - gel method\",\"authors\":\"Nabiya Iqbal, Anju Dixit, Pramod S. Dobal\",\"doi\":\"10.1007/s10832-025-00397-x\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>In this work, bismuth doped barium titanate was synthesized by the sol– gel method. The samples were prepared using the chemical formula, Ba<sub>1 − x</sub>Bi<sub>x</sub>TiO<sub>3</sub> in which compositions corresponding to x = 0.05 and 0.15 i.e., Ba<sub>0.95</sub>Bi<sub>0.05</sub>TiO<sub>3</sub> (BBT5) and Ba<sub>0.85</sub>Bi<sub>0.15</sub>TiO<sub>3</sub> (BBT15), showed a relaxor - type behavior. The temperature and frequency dependent dielectric measurements, were made which clearly showed that the peak corresponding to the dielectric maxima shifted towards higher temperature as frequency is increased in both the cases. The calculated values of the index of relaxation and the broadening parameter from the linear fit of the experimental data which was plotted according to the modified Curie– Weiss law also supported this behavior. At 500 kHz, the index of relaxation was calculated as 1.61 and 1.43 for BBT5 and BBT15 respectively and the broadening parameter as 121.5 K and 96.9 K for BBT5 and BBT15 respectively. It was also concluded that lower concentration of bismuth (x = 0.05) showed a better performance as compared to that of the higher one.</p></div>\",\"PeriodicalId\":625,\"journal\":{\"name\":\"Journal of Electroceramics\",\"volume\":\"53 3\",\"pages\":\"312 - 320\"},\"PeriodicalIF\":2.6000,\"publicationDate\":\"2025-04-09\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Electroceramics\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://link.springer.com/article/10.1007/s10832-025-00397-x\",\"RegionNum\":4,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"MATERIALS SCIENCE, CERAMICS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Electroceramics","FirstCategoryId":"88","ListUrlMain":"https://link.springer.com/article/10.1007/s10832-025-00397-x","RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MATERIALS SCIENCE, CERAMICS","Score":null,"Total":0}
Dielectric relaxation in Ba0.95Bi0.05TiO3 and Ba0.85Bi0.15TiO3 ceramics synthesized by sol - gel method
In this work, bismuth doped barium titanate was synthesized by the sol– gel method. The samples were prepared using the chemical formula, Ba1 − xBixTiO3 in which compositions corresponding to x = 0.05 and 0.15 i.e., Ba0.95Bi0.05TiO3 (BBT5) and Ba0.85Bi0.15TiO3 (BBT15), showed a relaxor - type behavior. The temperature and frequency dependent dielectric measurements, were made which clearly showed that the peak corresponding to the dielectric maxima shifted towards higher temperature as frequency is increased in both the cases. The calculated values of the index of relaxation and the broadening parameter from the linear fit of the experimental data which was plotted according to the modified Curie– Weiss law also supported this behavior. At 500 kHz, the index of relaxation was calculated as 1.61 and 1.43 for BBT5 and BBT15 respectively and the broadening parameter as 121.5 K and 96.9 K for BBT5 and BBT15 respectively. It was also concluded that lower concentration of bismuth (x = 0.05) showed a better performance as compared to that of the higher one.
期刊介绍：
While ceramics have traditionally been admired for their mechanical, chemical and thermal stability, their unique electrical, optical and magnetic properties have become of increasing importance in many key technologies including communications, energy conversion and storage, electronics and automation. Electroceramics benefit greatly from their versatility in properties including:
-insulating to metallic and fast ion conductivity
-piezo-, ferro-, and pyro-electricity
-electro- and nonlinear optical properties
-feromagnetism.
When combined with thermal, mechanical, and chemical stability, these properties often render them the materials of choice.
The Journal of Electroceramics is dedicated to providing a forum of discussion cutting across issues in electrical, optical, and magnetic ceramics. Driven by the need for miniaturization, cost, and enhanced functionality, the field of electroceramics is growing rapidly in many new directions. The Journal encourages discussions of resultant trends concerning silicon-electroceramic integration, nanotechnology, ceramic-polymer composites, grain boundary and defect engineering, etc.
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