SmCo_xFe_(1-x)O_3的制备及其电磁特性的研究  

Preparation and Electromagnetic Properties of SmCo_xFe_(1-x)O_3

作　　者：张静[1] 黄啸谷[1] 张其土[1,2] 

机构地区：[1]南京工业大学材料科学与工程学院,江苏南京210009 [2]南京工业大学江苏省无机及其复合新材料重点实验室,江苏南京210009

出　　处：《稀有金属》2011年第6期950-954,共5页Chinese Journal of Rare Metals

基　　金：2010年江苏省大学生实践创新训练计划项目;总装预研基金资助项目(9140A××××6401);江苏省高校自然科学基金(10KJB430008);江苏高校优势学科建设工程资助项目

摘　　要：采用固相法制得了SmCoxFe1-xO3(x=0,0.2,0.4,0.6)粉体。借助XRD,SEM对不同Co掺杂量的SmCoxFe1-xO3粉体的物相组成和形貌进行了表征。此外,利用网络分析仪测试了不同Co掺杂量下SmCoxFe1-xO3的电磁特性及微波反射损耗性能。测试结果表明:采用固相法在1250℃、保温3 h、当Co掺杂量x≤0.4时,可以制得单一相的SmFeO3粉体;颗粒呈现不规则形貌,颗粒尺寸随着掺杂量的增加有所减小,当掺杂量x=0.4时,平均颗粒尺寸约为1μm;适量掺杂Co元素后,材料的介电损耗有所增强,样品的复介电常数同时也有所改善;当单层SmCo0.4Fe0.6O3材料的厚度为2.1 mm时,反射损耗在15.8 GHz左右出现约为-21 dB的峰值。SmCoxFe1-xO3（x=0,0.2,0.4,0.6） powders were prepared by solid state reaction.The phase composition and surface appearance of the obtained SmCoxFe1-xO3 ferrites were characterized by XRD,and SEM,respectively.Moreover,the electromagnetic properties and microwave reflection loss（RL） were measured using network analyzer（Agilent 8722ET）.The results showed that the pure SmFeO3 formed when x≤0.4 at 1250 ℃ for 3 h.In addition,the particles exhibited irregular shape.The particle size decreased with the increasing substitution amounts of Co and the average size was about 1 μm when x=0.4.A small amount of Co substitution could adjust dielectric loss and complex permittivity.For the single SmCo0.4Fe0.6O3 microwave absorber,the maximum reflection loss（RL） was about-21 dB at 15.8 GHz when the thickness was 2.1 mm.

关 键 词：SmFeO3 固相法 电磁特性 反射损耗 

分 类 号：TQ637[化学工程—精细化工]