溶胶-凝胶法制备Ni_(0.7)Zn_(0.3)Fe_2O_4镍锌铁氧体及其电磁损耗性能研究  

Synthesis by Sol-gel Method and Electromagnetic Loss Property of Ni_(0.7)Zn_(0.3)Fe_2O_4 Ferrite

作　　者：吕淑珍[1] 刘树信[2] 王海滨[2] 姚晓霞[2] 罗娟[2] 

机构地区：[1]西南科技大学材料科学与工程学院,绵阳621010 [2]绵阳师范学院化学与化学工程学院,绵阳621000

出　　处：《硅酸盐通报》2010年第2期361-364,389,共5页Bulletin of the Chinese Ceramic Society

基　　金：四川省科技厅资助科研项目(2006J13-034);四川省教育厅资助科研项目(2006A139)

摘　　要：以Zn(NO3)2.6H2O、Ni(NO3)2.6H2O和Fe(NO3)3.9H2O及柠檬酸为原料,采用溶胶-凝胶法制备前驱体,在1200℃下煅烧3h合成了Ni0.7Zn0.3Fe2O4铁氧体。通过TG/SDTA对前驱体进行了分析,发现柠檬酸在240℃附近开始分解,450～550℃存在柠檬酸的二次分解。利用XRD、IR和TEM对产品进行了表征,结果表明:Ni0.7Zn0.3Fe2O4属于立方晶系尖晶石结构,结晶完整,在580cm-1附近具有铁氧体的红外吸收特征峰;由SEM观察表明,样品呈松散多孔状,由较小粒子组成;由TEM分析表明,晶粒大小在100nm左右。在0.2～1.8GHz的频率下对产品进行了电磁损耗性能测试,结果表明:在该频率范围内Ni0.7Zn0.3Fe2O4具有优良的电磁损耗特性,是一种良好的吸波材料。Ni0.7Zn0.3Fe2O4 ferrite were synthesized by Sol-gel method with Zn （NO3 ）2 · 6H2O and Ni （NO3）2 · 6H20 and Fe（NO3 ）3 · 9H20 and C6H807·H2O as raw material. The precursor were analyzed by TG/SDTA. The results showed that C6H807 · H2O decomposed at 240 ℃ and citrate secondary decomposed at 450-550 ℃. The product was characterized and analyzed by XRD, IR, SEM and TEM. The results indicated that the product was single phase cubic crystal system spinel structure and the crystals were crystallized with good integrality. The sample were unfirm and were composed of some small particles and grain colony was about 100 nm by SEM and TEM. Electromagnetic loss property of the sample were tested, The results indicated that Ni0.7Zno. 3 Fe204 had a better magnetic loss property than Zn2Fe204 at 0.2-1.8 GHz.

关 键 词：镍锌铁氧体 溶胶-凝胶法 电磁损耗 制备 

分 类 号：TM227[一般工业技术—材料科学与工程]