【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ZnFe₂O₄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ZnFe₂O₄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20⁵0 nm;ZnFe₂O₄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ZnFe₂O₄对2¹8 GHz范围内的电磁波表现为同时具备介电损耗和磁损耗。更多还原

【Abstract】 Spinel ZnFe₂O₄ particles were synthesized by solid phase synthesis after ultrasonic activating mixture of Mg（OH）₂/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 Mmax= 3. 022 emu/g and the dielectric loss materials in the range of 2 18 GHz frequency.更多还原