Gd^(3+)掺杂锰锌铁氧体的高分子吸附燃烧法制备及电磁性能

Gd^(3+) Doped Mn-Zn Ferrites: Preparation by Polymer Adsorbent Combustion and Electromagnetic Properties

采用固态高分子吸附燃烧法合成了Gd3+掺杂锰锌铁氧体Mn0.3Zn0.7Fe2-xGdxO4(x=0,0.01,0.02,0.03,0.04)。借助XRD、SEM和网络分析仪等研究了样品的物相结构和掺杂浓度与电磁特性的关系。结果表明:当x≤0.02时,制得的粉体为单一的锰锌铁氧体,样品的晶格常数随着Gd3+掺杂量的增加先增后减。少量Gd3+掺杂能有效调整锰锌铁氧体的电磁参数,当x=0.02时,微波电磁损耗(RL)最大值达到-18.7dB。

Mn-Zn ferrites doped with Gd3＋, Mn0.3Zn0.7Fe2-xGdxO4（x=0, 0.01, 0.02, 0.03, 0.04）, were synthesized by polymer adsorbent combustion method. Samples were characterized by XRD, SEM and network analyzer to investigate the dependence of electromagnetic properties on phase structure and Gd3＋ doping amount. The results show that pure Mn-Zn ferrites are formed when x≤0.02. The lattice parameters of ferrites first increase and then decrease with the substitution amount of Gd3＋ . A small amount of Gd3＋ substitution could adjust microwave electromagnetic parameters. The peak value of the microwave electromagnetic loss is about-18.7 dB when x=0.02.