中文摘要：

采用原位合成法制备聚吡咯包覆钛酸钡，考察其形貌和粒径及包覆不同比例钛酸钡对其吸波性能的影响。用溶胶凝胶法合成稀土掺杂的钡铁氧体，考察掺杂不同稀土元素对形貌、粒径、晶相和吸波性能的影响。研究表明，聚吡咯包覆钛酸钡为球形，分散均匀；钛酸钡复合材料的吸波性能随着钛酸钡质量比的增加而增强，当质量比为1：6时，最大吸收峰值为6．9dB。稀土掺杂的钡铁氧体均为M型铁氧体，物相单一；掺杂不同的稀土金属，吸波性能优于纯钡铁氧体，当掺杂镧时，吸波性能最好，最大吸收峰值为4．5dB。

英文摘要：

The ceramic particles of barium titanate composite materials surrounded by polypyrrole was synthesized by situ polymerization, effects of its morphology, particle size and different proportions of coated barium titanate on absorbing properties was studied in this paper; rare earth doped barium ferrite was synthesized by traditional sol-gel method, effects of different rare earth elements doping on barium fer-rite on its morphology, particle size, crystal phase and absorbing properties was studied. The results showed that polypyrrole-coated barium titanate was spherical, uniformly dispersed; the absorbing properties of barium titanate composite was enhanced with the increase of the mass ratio of barium titanate, when the mass ratio was 1：6, the maximum absorption peak was 6.9dB. Rare earth doped barium ferrite were M-type ferrite, single phase; absorbing properties doped with different rare earth metals was better than pure barium ferrite, when doped lan-thanum, it absorbed the best performance, the maximum absorption peak was 4.5 dB.