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.
出处
《稀有金属》
EI
CAS
CSCD
北大核心
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
关键词
SmFeO3
固相法
电磁特性
反射损耗
SmFeO3
solid state reaction
electromagnetic properties
reflection loss
