摘要
将Zn(OH)_2/Fe(OH)_3混合体超声活化5 h,固相合成制备了尖晶石型ZnFe_2O_4粉末。通过TG、XRD和TEM测试,分析固相反应的机理、材料的化学成分和微观结构。用振动样品磁强计(VSM)、矢量网络分析仪研究材料的电磁性能。结果表明,700℃下制备的ZnFe_2O_4颗粒为纳米级单晶颗粒状结构,纯度高,结晶性好,粒径分布为20~50 nm;ZnFe_2O_4磁纳米颗粒在室温条件表现为顺磁性,磁化强度最大值Mmax为3.022 emu/g;机械力活化协同固相合成制备的ZnFe_2O_4对2~18 GHz范围内的电磁波表现为同时具备介电损耗和磁损耗。
Spinel ZnFe2Q particles were synthesized by solid phase synthesis after ultrasonic activating mixture of Mg（OH）z/Fe（OH）3 for 5 h. The asprepared materials were characterized by TG-DTA, XRD, TEM, vibration sample magnetic field meter （VSM） and vector network analyzer. The results showed that ZnFe2O4 particles calcined at 700℃ were about 20 - 50 nm in size withe high purity and well crystallization. The analysis on magnetic properties indicated that ZnFe2O4 particles were paramagnetic at room temperature with M = 3.022 emu/g and the dielectric loss materials in the range of 2 - 18 GHz frequency.
作者
李应涛
李生娟
徐波
索路路
任光鹏
LI Ying-tao LI Sheng-juan XU Bo SUO Lu-lu REN Guang-peng(School of Materials Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200093 College of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China)
出处
《广州化工》
CAS
2017年第19期22-24,36,共4页
GuangZhou Chemical Industry
基金
国家自然科学基金资助项目(51402192)
沪江基金资助项目(B14006)
关键词
超声活化
固相合成
锌铁氧体
电磁性能
ultrasound activation
solid phase synthesis
Zinc ferrite
electromagnetic properties
