Eduardo V. Araújo, Raphael V. B. Campos, Marcelo A. S. Silva, Antônio S. B. Sombra, Luciana M. R. Alencar, Alan S. de Menezes, Ralph Santos-Oliveira, Danielo G. Gomes, Juliano C. Denardin, Rafael M. Freire, Pierre B. A. Fechine
{"title":"硫酸咖啡和硫酸镁尖晶石铁素体环氧复合材料的介电和微波性能","authors":"Eduardo V. Araújo, Raphael V. B. Campos, Marcelo A. S. Silva, Antônio S. B. Sombra, Luciana M. R. Alencar, Alan S. de Menezes, Ralph Santos-Oliveira, Danielo G. Gomes, Juliano C. Denardin, Rafael M. Freire, Pierre B. A. Fechine","doi":"10.1007/s00339-025-08857-5","DOIUrl":null,"url":null,"abstract":"<div><p>In this study, we developed polymer-ceramic composites based on diglycidyl ether bisphenol A (DGEBA) epoxy resin reinforced with spinel ferrites, CoFe₂O₄ (CFO) and MgFe₂O₄ (MFO), aiming for advanced dielectric applications. The curing process was optimized using branched polyethyleneimine (BPEI) as a hardener, achieving an optimal 4:1 DGEBA: BPEI ratio at 100 °C for 1 h. Structural and morphological characterizations were performed using XRD, vibrating sample magnetometry (VSM), FTIR and SEM. Dielectric properties were investigated through impedance spectroscopy in the radiofrequency range (1–10 MHz) at temperatures from 100 to 200 °C, while microwave properties were analyzed in the X-band (8.2–12.4 GHz). All analyzed samples exhibited behavior that could be described by two R-CPE circuits. The composites were also evaluated in the microwave region, specifically in the X-band, where two absorption peaks were observed at around 11 and 11.9 GHz for the MFO10, MFO20, and CFO10 samples.</p></div>","PeriodicalId":473,"journal":{"name":"Applied Physics A","volume":"131 9","pages":""},"PeriodicalIF":2.8000,"publicationDate":"2025-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Tunable dielectric and microwave properties of epoxy composites with cofe₂o₄ and mgfe₂o₄ spinel ferrites\",\"authors\":\"Eduardo V. Araújo, Raphael V. B. Campos, Marcelo A. S. Silva, Antônio S. B. Sombra, Luciana M. R. Alencar, Alan S. de Menezes, Ralph Santos-Oliveira, Danielo G. Gomes, Juliano C. Denardin, Rafael M. Freire, Pierre B. A. Fechine\",\"doi\":\"10.1007/s00339-025-08857-5\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>In this study, we developed polymer-ceramic composites based on diglycidyl ether bisphenol A (DGEBA) epoxy resin reinforced with spinel ferrites, CoFe₂O₄ (CFO) and MgFe₂O₄ (MFO), aiming for advanced dielectric applications. The curing process was optimized using branched polyethyleneimine (BPEI) as a hardener, achieving an optimal 4:1 DGEBA: BPEI ratio at 100 °C for 1 h. Structural and morphological characterizations were performed using XRD, vibrating sample magnetometry (VSM), FTIR and SEM. Dielectric properties were investigated through impedance spectroscopy in the radiofrequency range (1–10 MHz) at temperatures from 100 to 200 °C, while microwave properties were analyzed in the X-band (8.2–12.4 GHz). All analyzed samples exhibited behavior that could be described by two R-CPE circuits. The composites were also evaluated in the microwave region, specifically in the X-band, where two absorption peaks were observed at around 11 and 11.9 GHz for the MFO10, MFO20, and CFO10 samples.</p></div>\",\"PeriodicalId\":473,\"journal\":{\"name\":\"Applied Physics A\",\"volume\":\"131 9\",\"pages\":\"\"},\"PeriodicalIF\":2.8000,\"publicationDate\":\"2025-08-20\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Applied Physics A\",\"FirstCategoryId\":\"4\",\"ListUrlMain\":\"https://link.springer.com/article/10.1007/s00339-025-08857-5\",\"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":"Applied Physics A","FirstCategoryId":"4","ListUrlMain":"https://link.springer.com/article/10.1007/s00339-025-08857-5","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}
Tunable dielectric and microwave properties of epoxy composites with cofe₂o₄ and mgfe₂o₄ spinel ferrites
In this study, we developed polymer-ceramic composites based on diglycidyl ether bisphenol A (DGEBA) epoxy resin reinforced with spinel ferrites, CoFe₂O₄ (CFO) and MgFe₂O₄ (MFO), aiming for advanced dielectric applications. The curing process was optimized using branched polyethyleneimine (BPEI) as a hardener, achieving an optimal 4:1 DGEBA: BPEI ratio at 100 °C for 1 h. Structural and morphological characterizations were performed using XRD, vibrating sample magnetometry (VSM), FTIR and SEM. Dielectric properties were investigated through impedance spectroscopy in the radiofrequency range (1–10 MHz) at temperatures from 100 to 200 °C, while microwave properties were analyzed in the X-band (8.2–12.4 GHz). All analyzed samples exhibited behavior that could be described by two R-CPE circuits. The composites were also evaluated in the microwave region, specifically in the X-band, where two absorption peaks were observed at around 11 and 11.9 GHz for the MFO10, MFO20, and CFO10 samples.
期刊介绍：
Applied Physics A publishes experimental and theoretical investigations in applied physics as regular articles, rapid communications, and invited papers. The distinguished 30-member Board of Editors reflects the interdisciplinary approach of the journal and ensures the highest quality of peer review.
求助内容：
应助结果提醒方式：
京公网安备 11010802042870号
