BaTiO_3包覆羰基铁吸波剂的制备及其吸波性能研究  

Preparation and Wave Absorbing Properties of BaTiO_3 Coated Carbonyl Iron Absorbing Material

作　　者：李泽[1] 许宝才[1] 王建江[1] 赵芳[1] LI Ze XU Bao-cai WANG Jian-jiang ZHAO Fang(Institute for Advanced Materials, Ordnance Engineering College, Shijiazhuang 050003, Chin)

机构地区：[1]军械工程学院先进材料研究所,石家庄050003

出　　处：《人工晶体学报》2016年第9期2240-2245,2256,共7页Journal of Synthetic Crystals

基　　金：装备预研重点实验室基金(9140C870401140C87366);河北省自然科学基金(E2015506011)

摘　　要：为了进一步改善羰基铁低频吸波性能,本文采用溶胶凝胶法和高能球磨法制备了BaTiO_3表面改性羰基铁的复合吸波剂,并通过X射线衍射仪、SEM、EDS和矢量网络分析仪等手段对复合吸波剂的微观形貌,结构组成和吸波性能进行了分析和研究。结果表明:随球磨时间的增加,BaTiO_3与羰基铁的结合形式由混合变为表面吸附,介电常数显著增大,磁导率略微增加,低频段阻抗匹配性能及电磁波衰减能力得到提升。当球磨时间为2 h复合吸波剂在3.2 GHz处反射率达到-15.5 d B。通过BaTiO_3对羰基铁表面改性能够调节介电常数并显著提升材料的低频吸波性能。In order to improve wave absorbing properties in low frequency, in this study BaTiO3/carbonyl iron core-shell absorbing material were prepared by sol-gel method and high energy ball milling, and the phase, morphology and performance of materials were analyzed and studied by XRD, SEM, EDS and vector network analyzer. The results show that with the increase of milling time, the composite form of BaTiO3/carbonyl iron from physical blending to surface adsorption, the permittibity significantly increased and the permeability slightly increased,the impedance matching performance in low frequency and electromagnetic loss properties got promoted. After 2 h milling, the reflectivity of composite materials achieve - 15. 5 dB at 3. 2 GHz. The permittibity can be adjust and improve wave absorbing properties by BaTiO3 surface modification carbonyl iron.

关 键 词：表面改性 低频吸波 溶胶凝胶 高能球磨 

分 类 号：TB34[一般工业技术—材料科学与工程] TG333[金属学及工艺—金属压力加工]