W型六角晶系铁氧体和钛酸钡共混制备吸波材料  

Preparation of Absorbing Materials by Mixing W Type Hexagonal Ferrite and Barium Titanate Particles

作　　者：宫剑[1] 徐光亮[1] 余洪滔[1] 黄纯洁[1] 任小虎[1] 

机构地区：[1]西南科技大学四川省非金属复合与功能材料重点实验室-省部共建国家重点实验室培育基地,西南科技大学新材料研究所,绵阳621010

出　　处：《人工晶体学报》2012年第4期1119-1124,共6页Journal of Synthetic Crystals

基　　金：四川省教育厅重点项目(08ZA009);西南科技大学研究生创新基金资助(11ycjj02)

摘　　要：为拓宽材料在微波频段下的吸波频带,制备了W型六角晶系铁氧体和BaTiO3粉体,通过XRD、SEM对产物的晶体结构和微观形貌进行分析;采用矢量网络分析仪测试了W型六角晶系铁氧体、BaTiO3及其复合物在2～14GHz的电磁参数,在2.8 mm下计算分析材料的吸波性能并对吸波原理进行分析。结果表明:W型六角晶系铁氧体在8～11 GHz频段内有较好的吸波性能(最小反射率为-48 dB);BaTiO3比例为25%的W型六角晶系铁氧体/BaTiO3复合物在保持较好的吸收性能(最小反射率为-31 dB)的同时,具有较宽的吸波频宽(小于-10 dB),为7GHz(7～14 GHz)。In order to expand the absorbing bandwidth of the materials in the microwave band, W type hexagonal ferrite and barium titanate particles were prepared. The structure and morphology of products were characterized by XRD and SEM. The electromagnetic parameters of W type hexagonal ferrite, barium titanate particles and their composite were tested by using a vector network analyzer in the band （2-14 GHz）, then the absorbing properties were calculated with a thickness （2.8 mm）. The results showed that W type hexagonal ferrite had good absorbing properties at 8 GHz to 11 GHz （minimum reflectivity was -48 dB）; the 25% barium titanate ratio of composite kept better absorbing properties, having wider absorbing band（less than -10 dB）, which was 7 GHz（7-14 GHz）.

关 键 词：W型六角晶系铁氧体 钛酸钡 吸波材料 电磁参数 反射损耗 

分 类 号：TB383[一般工业技术—材料科学与工程]