%0 Journal Article
%T Properties of Fe/SiO2 Core-shell Composite Particles with Different Nanoshell Thickness<br>SiO2纳米壳的厚度对羰基铁/SiO2核壳复合粒子的性能影响
%A TONG Guo-Xiu
%A WANG Wei
%A GUAN Jian-Guo
%A ZHANG Qing-Jie
%A <br>童国秀
%A 王维
%A 官建国
%A 张清杰
%J 无机材料学报
%D 2006
%I Science Press
%X Using a sol-gel route with polyvinyl pyrrolidone as the surfactant,the carbonyl iron microparticles were uniformly and fleetly coated by SiO_2 nanoshell,whose thickness was conve- niently different by changing reaction time.The influences of shell thickness on the properties of the Fe/SiO_2 core-shell particles were studied.The results show that increasing the thickness of SiO_2 nanoshell(D_(shell)),the anti-oxidation property of the Fe/SiO_2 core-shell composite parti- cles is obviously improved while microwave permittivity decreased monotoneously.The saturation magnetization shows a maximum value while both the coercivity and remnant magnetization show minimum values at D_(shell)=15nm.Meanwhile,the radar absorbing coating based on the Fe/SiO_2 core-shell composite particles with D_(shell)=15nm shows a maximum bandwidth of more than 10GHz, in which the reflective loss is less than-8dB.
%K core-shell particles
%K carbonyl iron
%K silica
%K microwave absorbing<br>核壳结构
%K 羰基铁
%K 二氧化硅
%K 微波吸收
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=84529CA2B2E519AC&jid=ABC0063016AF57E1C73EF43C8D2212BD&aid=D073E4725EF804C0&yid=37904DC365DD7266&vid=659D3B06EBF534A7&iid=B31275AF3241DB2D&sid=7A62566A3C1FFBE1&eid=819029E276C005ED&journal_id=1000-324X&journal_name=无机材料学报&referenced_num=10&reference_num=15