The study of the microwave properties of Co-Ni ferrite/nano carbon tube/β-SiC/rubber composits
碩士 === 國防大學中正理工學院 === 應用化學碩士班 === 99 === Based on the strong magnetic properties of cobalt ferrites and nickel ferrites, both were used in this study to combine with organic substrate to form composite materials of the advanced electromagnetic absorbers at GHz range.The spinel ferrites of CoxNi1-xFe...
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ndltd-TW-099CCIT05000072015-10-13T19:35:33Z http://ndltd.ncl.edu.tw/handle/23832324605042264411 The study of the microwave properties of Co-Ni ferrite/nano carbon tube/β-SiC/rubber composits 鈷鎳鐵氧體/奈米碳管/SiC複合材料的吸收電磁波研究 Chang,Juifang 張瑞芳 碩士 國防大學中正理工學院 應用化學碩士班 99 Based on the strong magnetic properties of cobalt ferrites and nickel ferrites, both were used in this study to combine with organic substrate to form composite materials of the advanced electromagnetic absorbers at GHz range.The spinel ferrites of CoxNi1-xFe2O4 ,( x=0,0.2,0.4,0.6,0.8,1.0 ),were synthesized by using aqueous combustion synthesis. The sol-gels, as-burnt powers and the final powers of the cobalt-nickel ferrite were characterized by XRD, FT-IR,SEM and VSM. The microwave absorption properties of β-SiC/ spinel ferrite/ nano carbon tube or nano carbon black/rubber composites were measured by the Vector Net-work Analyzer. Our results indicated that the highest saturated magnetization (Ms), the highest remanent magnetization (Mr), and the coercivity (Hc) of the spinel Co0.6Ni0.4Fe2O4 after heating at 900℃ were 109.35(emu/g), 46.291(emu/g), and 747.470(Oe), respectively.In addition , the composite materials,with the thickness of 2.0 mm , prepared by mixing 50g of β-SiC , 7.5g of Co0.6Ni0.4Fe2O4 , 2.5g carbon black, and 40g rubber,exhibited a reflection loss of -32.8 dB within the freguency range of 10.24 GHz to 11.19 GHz. Hong,Yawshun 洪耀勳 2011 學位論文 ; thesis 74 zh-TW |
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碩士 === 國防大學中正理工學院 === 應用化學碩士班 === 99 === Based on the strong magnetic properties of cobalt ferrites and nickel ferrites, both were used in this study to combine with organic substrate to form composite materials of the advanced electromagnetic absorbers at GHz range.The spinel ferrites of CoxNi1-xFe2O4 ,( x=0,0.2,0.4,0.6,0.8,1.0 ),were synthesized by using aqueous combustion synthesis. The sol-gels, as-burnt powers and the final powers of the cobalt-nickel ferrite were characterized by XRD, FT-IR,SEM and VSM. The microwave absorption properties of β-SiC/ spinel ferrite/ nano carbon tube or nano carbon black/rubber composites were measured by the Vector Net-work Analyzer. Our results indicated that the highest saturated magnetization (Ms), the highest remanent magnetization (Mr), and the coercivity (Hc) of the spinel Co0.6Ni0.4Fe2O4 after heating at 900℃ were 109.35(emu/g), 46.291(emu/g), and 747.470(Oe), respectively.In addition , the composite materials,with the thickness of 2.0 mm , prepared by mixing 50g of β-SiC , 7.5g of Co0.6Ni0.4Fe2O4 , 2.5g carbon black, and 40g rubber,exhibited a reflection loss of -32.8 dB within the freguency range of 10.24 GHz to 11.19 GHz.
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Hong,Yawshun |
author_facet |
Hong,Yawshun Chang,Juifang 張瑞芳 |
author |
Chang,Juifang 張瑞芳 |
spellingShingle |
Chang,Juifang 張瑞芳 The study of the microwave properties of Co-Ni ferrite/nano carbon tube/β-SiC/rubber composits |
author_sort |
Chang,Juifang |
title |
The study of the microwave properties of Co-Ni ferrite/nano carbon tube/β-SiC/rubber composits |
title_short |
The study of the microwave properties of Co-Ni ferrite/nano carbon tube/β-SiC/rubber composits |
title_full |
The study of the microwave properties of Co-Ni ferrite/nano carbon tube/β-SiC/rubber composits |
title_fullStr |
The study of the microwave properties of Co-Ni ferrite/nano carbon tube/β-SiC/rubber composits |
title_full_unstemmed |
The study of the microwave properties of Co-Ni ferrite/nano carbon tube/β-SiC/rubber composits |
title_sort |
study of the microwave properties of co-ni ferrite/nano carbon tube/β-sic/rubber composits |
publishDate |
2011 |
url |
http://ndltd.ncl.edu.tw/handle/23832324605042264411 |
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