中南大学学报（自然科学版）2011，Vol.42Issue(11)：3315-3319,5.
Bi1-xLaxFeO3多铁体系的微波吸收性能
Microwave absorption properties of multiferroic Bi1-xLaxFeO3
摘要
Abstract
The crystalline powders of Bi^LsLxFeOj (*=0, 0.05, 0.10, 0.15) were prepared by Sol-Gel process .The crystal structure was characterized by XRD, and the surface morphology and size of the particles were observed by SEM .The complex dielectric constant and complex permeability of the samples were measured by microwave vector network analyzer, and the loss tangent and microwave reflectivity were calculated in the frequency range from 2 to 18 GHz according to measurements. The results show that the crystal structure of Bii-jLajFeOs is perovskite, the morphology of the particles looks like irregular short rods, and La doped at A-site is helpful to improve its microwave absorption. The absorption peak is 27.7 dB and the bandwidth less than -10 dB is 3.4 GHz when the sample thickness is 2.6 mm and x=0.10. The analysis shows that the material has both dielectric loss and magnetic loss, but the former is the major loss.关键词
微波吸收/BiFeO3/电磁损耗/多铁体Key words
microwave absorption/ BiFeO3/ electromagnetic loss/ multiferroics分类
数理科学引用本文复制引用
赵新闻,韩建华,周克省,秦宪明,邓联文,陈颖,夏辉..Bi1-xLaxFeO3多铁体系的微波吸收性能[J].中南大学学报（自然科学版）,2011,42(11):3315-3319,5.基金项目
国家自然科学基金资助项目(60771028) （60771028）
湖南省自然科学基金资助项目(10JJ5049) （10JJ5049）
