{"title":"La掺杂NBCCTO陶瓷的制备及其介电性能","authors":"Qi Hu, Jiayuan Tang, Yuancheng Teng, Xiaofeng Zhao, Temirlan Arslanov, Rajeev Ahuja","doi":"10.1007/s10832-022-00280-z","DOIUrl":null,"url":null,"abstract":"<div><p>CaCu<sub>3</sub>Ti<sub>4</sub>O<sub>12</sub> ceramics have great dielectric constant, excellent temperature stability and good frequency stability. However, due to high dielectric loss, its practical application in engineering is hindered. In this paper, Na<sub>0.25</sub>Bi<sub>0.25</sub>La<sub><i>x</i></sub>Ca<sub>0.5-3<i>x</i>/2</sub>Cu<sub>3</sub>Ti<sub>4</sub>O<sub>12</sub> (NBLCCTO) ceramics were prepared by solid phase synthesis. The effects of sintering temperature and La content on dielectric properties of NBLCCTO ceramics were studied. The results show when the sintering temperature is 1030℃ and La content is 0.05, NBLCCTO ceramics show better dielectric properties. Its dielectric constant has ε<sub>r</sub> = 22,231 at 1 kHz and its dielectric loss is 0.0546 at 10 kHz. Appropriate doping of La can lead to grain refinement and enlarge specific surface area of grain boundary, thus increasing resistivity and reducing dielectric loss. Therefore, NBLCCTO ceramics have lower dielectric loss than Na<sub>0.25</sub>Bi<sub>0.25</sub>Ca<sub>0.5</sub>Cu<sub>3</sub>Ti<sub>4</sub>O<sub>12</sub> (NBCCTO).</p></div>","PeriodicalId":625,"journal":{"name":"Journal of Electroceramics","volume":"48 3","pages":"117 - 126"},"PeriodicalIF":1.7000,"publicationDate":"2022-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":"{\"title\":\"Preparation and dielectric properties of La doped NBCCTO ceramics\",\"authors\":\"Qi Hu, Jiayuan Tang, Yuancheng Teng, Xiaofeng Zhao, Temirlan Arslanov, Rajeev Ahuja\",\"doi\":\"10.1007/s10832-022-00280-z\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>CaCu<sub>3</sub>Ti<sub>4</sub>O<sub>12</sub> ceramics have great dielectric constant, excellent temperature stability and good frequency stability. However, due to high dielectric loss, its practical application in engineering is hindered. In this paper, Na<sub>0.25</sub>Bi<sub>0.25</sub>La<sub><i>x</i></sub>Ca<sub>0.5-3<i>x</i>/2</sub>Cu<sub>3</sub>Ti<sub>4</sub>O<sub>12</sub> (NBLCCTO) ceramics were prepared by solid phase synthesis. The effects of sintering temperature and La content on dielectric properties of NBLCCTO ceramics were studied. The results show when the sintering temperature is 1030℃ and La content is 0.05, NBLCCTO ceramics show better dielectric properties. Its dielectric constant has ε<sub>r</sub> = 22,231 at 1 kHz and its dielectric loss is 0.0546 at 10 kHz. Appropriate doping of La can lead to grain refinement and enlarge specific surface area of grain boundary, thus increasing resistivity and reducing dielectric loss. Therefore, NBLCCTO ceramics have lower dielectric loss than Na<sub>0.25</sub>Bi<sub>0.25</sub>Ca<sub>0.5</sub>Cu<sub>3</sub>Ti<sub>4</sub>O<sub>12</sub> (NBCCTO).</p></div>\",\"PeriodicalId\":625,\"journal\":{\"name\":\"Journal of Electroceramics\",\"volume\":\"48 3\",\"pages\":\"117 - 126\"},\"PeriodicalIF\":1.7000,\"publicationDate\":\"2022-03-25\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"1\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Electroceramics\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://link.springer.com/article/10.1007/s10832-022-00280-z\",\"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/s10832-022-00280-z","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}
Preparation and dielectric properties of La doped NBCCTO ceramics
CaCu3Ti4O12 ceramics have great dielectric constant, excellent temperature stability and good frequency stability. However, due to high dielectric loss, its practical application in engineering is hindered. In this paper, Na0.25Bi0.25LaxCa0.5-3x/2Cu3Ti4O12 (NBLCCTO) ceramics were prepared by solid phase synthesis. The effects of sintering temperature and La content on dielectric properties of NBLCCTO ceramics were studied. The results show when the sintering temperature is 1030℃ and La content is 0.05, NBLCCTO ceramics show better dielectric properties. Its dielectric constant has εr = 22,231 at 1 kHz and its dielectric loss is 0.0546 at 10 kHz. Appropriate doping of La can lead to grain refinement and enlarge specific surface area of grain boundary, thus increasing resistivity and reducing dielectric loss. Therefore, NBLCCTO ceramics have lower dielectric loss than Na0.25Bi0.25Ca0.5Cu3Ti4O12 (NBCCTO).
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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