%0 Journal Article
%T Dielectric Properties of Si/C/N Nano Powders<br>Si/C/N纳米粉体的吸波特性研究
%A JIAO Huan
%A LUO Fa
%A ZHOU Wan-Cheng
%A <br>焦桓
%A 罗发
%A 周万城
%J 无机材料学报
%D 2002
%I Science Press
%X Si/C/N nano powders with 11.61% nitrogen were prepared by CVD. XRD pattern and permittivity of the powders were investigated. On the basis of permittivity of the powders, radar absorber structures of single- and double-layer were designed. A single-layer absorber coating with a reflection coefficient less than -5dB in the frequency range of 8-15GHz was designed with a thickness of 2.7mm. A double-layer radar absorber coating with a reflection coefficient less than -5dB in the frequency range of 8-18GHz was also designed with a thickness of 2.8mm. The range of the reflection coefficient being less than -8dB was 6GHz for the designed double-layer radar absorber. The radar absorbing mechanism of Si/C/N nano powders was also interpreted. The SiC microcrystalline in the nano composite powder dissolves a great deal of nitrogen. The charged defects are caused by N atoms occupying the sites of C in SiC moved in response to the electric field. The dielectric relaxation caused by the charged defects moved in response to the electric field is the main way of the Si/C/N nano powders with absorbing properties.
%K Si/C/N nano powder
%K permittivity
%K structure design
%K absorbing mechanism<br>Si／C／N纳米粉体
%K 吸波特性
%K 介电性能
%K 吸波结构
%K 优化设计
%K 吸波机理
%K 碳化硅
%K 隐身材料
%K 氮化硅
%K 复合材料
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=84529CA2B2E519AC&jid=ABC0063016AF57E1C73EF43C8D2212BD&aid=436827CDA3AD67E0&yid=C3ACC247184A22C1&vid=BCA2697F357F2001&iid=38B194292C032A66&sid=240CB58995465C01&eid=4158386E7B9422C8&journal_id=1000-324X&journal_name=无机材料学报&referenced_num=14&reference_num=11