{"title":"CaCu3Ti4O12/CoFe2O4 硅橡胶复合材料的介电和电磁屏蔽行为","authors":"Neelam Kumari, Shivali Meena, Amena Salim, Rahul Singhal, Vishant Gahlaut, Jigar Limbachiya, Bhuwaneshwar Semwal, Ravi Hegde, Umesh Kumar Dwivedi","doi":"10.1557/s43578-024-01416-3","DOIUrl":null,"url":null,"abstract":"<p>With mushrooming of wireless wearable devices, demand of efficient electromagnetic interference (EMI) shielding material gained much interest to obstruct the unwanted radiations. This paper reports the fabrication of CaCu<sub>3</sub>Ti<sub>4</sub>O<sub>12</sub>(CCTO)/CoFe<sub>2</sub>O<sub>4</sub>(CFO)/silicone composites and investigation of their dielectric and EMI shielding characteristics. The EMI shielding effectiveness and dielectric properties of prepared composites are evaluated for different compositions of CaCu<sub>3</sub>Ti<sub>4</sub>O<sub>12</sub> (50, 35, 25, 15 wt%) and CoFe<sub>2</sub>O<sub>4</sub> (0, 15, 25, 35 wt%) in silicone matrix. The dielectric constant found maximum (~ 50) for CCS-3 composite. The CaCu<sub>3</sub>Ti<sub>4</sub>O<sub>12</sub>/CoFe<sub>2</sub>O<sub>4</sub>/silicone composites (0 and 35% CoFe<sub>2</sub>O<sub>4</sub>) exhibited total shielding effectiveness (SE<sub>T</sub> ~ 6 dB) corresponds to 75% shielding efficiency in X-band. By introducing magnetic filler with CaCu<sub>3</sub>Ti<sub>4</sub>O<sub>12</sub> in silicone matrix, better EMI attenuation is remarkably achieved. The shielding mechanism displays synergistic contribution of magnetic particles, colossal dielectric particles, and insulating elastomeric matrix. This work provides an avenue for developing better electromagnetic radiation shielding material for wearable electronics, and dielectric resonators.</p><h3 data-test=\"abstract-sub-heading\">Graphical abstract</h3>\n","PeriodicalId":16306,"journal":{"name":"Journal of Materials Research","volume":null,"pages":null},"PeriodicalIF":2.7000,"publicationDate":"2024-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Dielectric and electromagnetic shielding behavior of CaCu3Ti4O12/CoFe2O4/silicone rubber composites\",\"authors\":\"Neelam Kumari, Shivali Meena, Amena Salim, Rahul Singhal, Vishant Gahlaut, Jigar Limbachiya, Bhuwaneshwar Semwal, Ravi Hegde, Umesh Kumar Dwivedi\",\"doi\":\"10.1557/s43578-024-01416-3\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>With mushrooming of wireless wearable devices, demand of efficient electromagnetic interference (EMI) shielding material gained much interest to obstruct the unwanted radiations. This paper reports the fabrication of CaCu<sub>3</sub>Ti<sub>4</sub>O<sub>12</sub>(CCTO)/CoFe<sub>2</sub>O<sub>4</sub>(CFO)/silicone composites and investigation of their dielectric and EMI shielding characteristics. The EMI shielding effectiveness and dielectric properties of prepared composites are evaluated for different compositions of CaCu<sub>3</sub>Ti<sub>4</sub>O<sub>12</sub> (50, 35, 25, 15 wt%) and CoFe<sub>2</sub>O<sub>4</sub> (0, 15, 25, 35 wt%) in silicone matrix. The dielectric constant found maximum (~ 50) for CCS-3 composite. The CaCu<sub>3</sub>Ti<sub>4</sub>O<sub>12</sub>/CoFe<sub>2</sub>O<sub>4</sub>/silicone composites (0 and 35% CoFe<sub>2</sub>O<sub>4</sub>) exhibited total shielding effectiveness (SE<sub>T</sub> ~ 6 dB) corresponds to 75% shielding efficiency in X-band. By introducing magnetic filler with CaCu<sub>3</sub>Ti<sub>4</sub>O<sub>12</sub> in silicone matrix, better EMI attenuation is remarkably achieved. The shielding mechanism displays synergistic contribution of magnetic particles, colossal dielectric particles, and insulating elastomeric matrix. This work provides an avenue for developing better electromagnetic radiation shielding material for wearable electronics, and dielectric resonators.</p><h3 data-test=\\\"abstract-sub-heading\\\">Graphical abstract</h3>\\n\",\"PeriodicalId\":16306,\"journal\":{\"name\":\"Journal of Materials Research\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":2.7000,\"publicationDate\":\"2024-08-16\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Materials Research\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://doi.org/10.1557/s43578-024-01416-3\",\"RegionNum\":4,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"MATERIALS SCIENCE, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Materials Research","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1557/s43578-024-01416-3","RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
Dielectric and electromagnetic shielding behavior of CaCu3Ti4O12/CoFe2O4/silicone rubber composites
With mushrooming of wireless wearable devices, demand of efficient electromagnetic interference (EMI) shielding material gained much interest to obstruct the unwanted radiations. This paper reports the fabrication of CaCu3Ti4O12(CCTO)/CoFe2O4(CFO)/silicone composites and investigation of their dielectric and EMI shielding characteristics. The EMI shielding effectiveness and dielectric properties of prepared composites are evaluated for different compositions of CaCu3Ti4O12 (50, 35, 25, 15 wt%) and CoFe2O4 (0, 15, 25, 35 wt%) in silicone matrix. The dielectric constant found maximum (~ 50) for CCS-3 composite. The CaCu3Ti4O12/CoFe2O4/silicone composites (0 and 35% CoFe2O4) exhibited total shielding effectiveness (SET ~ 6 dB) corresponds to 75% shielding efficiency in X-band. By introducing magnetic filler with CaCu3Ti4O12 in silicone matrix, better EMI attenuation is remarkably achieved. The shielding mechanism displays synergistic contribution of magnetic particles, colossal dielectric particles, and insulating elastomeric matrix. This work provides an avenue for developing better electromagnetic radiation shielding material for wearable electronics, and dielectric resonators.
期刊介绍：
Journal of Materials Research (JMR) publishes the latest advances about the creation of new materials and materials with novel functionalities, fundamental understanding of processes that control the response of materials, and development of materials with significant performance improvements relative to state of the art materials. JMR welcomes papers that highlight novel processing techniques, the application and development of new analytical tools, and interpretation of fundamental materials science to achieve enhanced materials properties and uses. Materials research papers in the following topical areas are welcome.
• Novel materials discovery
• Electronic, photonic and magnetic materials
• Energy Conversion and storage materials
• New thermal and structural materials
• Soft materials
• Biomaterials and related topics
• Nanoscale science and technology
• Advances in materials characterization methods and techniques
• Computational materials science, modeling and theory
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