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采用聚丙烯酰胺凝胶法合成了尖晶石型锌铁氧体(ZnFe2O4),采用差分扫描-热重同步分析仪(DSC-TG),红外光谱(FT-IR),X射线衍射(XRD),透射电镜(TEM)和波导法对干凝胶和产物进行了表征.红外光谱显示当煅烧温度从500,℃升高到700,℃时,铁-氧(Fe—O)键的特征吸收峰从541,cm-1移动到566,cm-1;XRD表明干凝胶为无定形态,在煅烧温度为500,℃、煅烧时间为2,h时,凝胶形成纯相的尖晶石型纳米晶ZnFe2O4;由透射电镜可知煅烧温度为500,℃、600,℃和700,℃时,粉体的平均粒径分别为15nm、35,nm和60,nm;纳米晶体ZnFe2O4在8.2～12.4,GHz的测试频率范围内具有介电损耗和磁损耗.随着热处理温度的升高,介电常数、介电损耗、磁导率和磁损耗明显增大.
Spinel zinc ferrite (ZnFe2O4) was synthesized by polyacrylamide gel method and characterized by DSC-TG, FT-IR, XRD, , Transmission electron microscopy (TEM) and waveguide method were used to characterize the xerogel and the product.The IR spectra showed that when the calcination temperature increased from 500 ℃ to 700 ℃, the characteristic absorption peak of Fe-O bond From 541, cm-1 to 566, cm-1; XRD showed that the xerogel was in amorphous state. When the calcination temperature was 500 ℃ and the calcination time was 2 h, the gel formed a pure phase spinel Nanocrystalline ZnFe2O4; the transmission electron microscopy shows that the calcination temperature of 500, ℃, 600, ℃ and 700, ℃, the average particle size of the powder were 15nm, 35, nm and 60nm; nanocrystalline ZnFe2O4 in 8.2 ~ 12.4, Dielectric loss and magnetic loss are measured in the test frequency range of GHz, and the dielectric constant, dielectric loss, magnetic permeability and magnetic loss increase significantly as the heat treatment temperature increases.