酒石酸-硝酸盐低热固相反应制备Ni_(0.18)Cu_(0.2)Zn_(0.62)O(Fe_2O_3)_(0.98)铁氧体  

Preparation of Ni_(0.18)Cu_(0.2)Zn_(0.62)O(Fe_2O_3)_(0.98) by Low-Heating Solid-State Reaction Method

作　　者：杨项军[1] 韦群燕[1] 管洪涛[2] 王世雄[1] 高洪林[2] 

机构地区：[1]云南大学化学科学与工程学院,云南昆明650091 [2]云南大学物理科学技术学院,云南昆明650091

出　　处：《稀有金属》2010年第2期243-249,共7页Chinese Journal of Rare Metals

基　　金：国家“973”(2007CB613607);云南省自然科学基金(2006E0009Q)项目资助

摘　　要：以酒石酸和金属硝酸盐为原料,采用低热固相反应方法合成了Ni0.18Cu0.2Zn0.62O(Fe2O3)0.98尖晶石型铁氧体,并应用FT-IR,DSC-TG,XRD,TEM以及SEM等技术对低热固相反应过程和样品进行了研究和表征。FT-IR研究表明,酒石酸和金属硝酸盐在研磨30min后发生了低热固相反应,生成金属酒石酸盐前驱体。FT-IR和XRD分析表明,前驱体经不同温度焙烧后得到单一尖晶石相的NiCuZn铁氧体粉。依据谢乐公式计算和TEM表征,证明干凝胶在350℃分解1h后的粒径约为20～30nm,将此粉体在750℃下焙烧2h后,粒径增大到100～150nm。铁氧体于900℃烧结为陶瓷体后,晶粒约为2～4μm,烧结致密。随着烧结温度由850℃提高到900℃,NiCuZn铁氧体的矫顽力Hc有所下降,但饱和磁化强度Ms有所升高。磁谱测量表明,900℃烧结样品的磁导率为170,截止频率为32MHz,样品的磁性主要来源于畴壁位移的贡献。Ni0.18Cu0.2Zn0.62O(Fe2O3)0.98 ferrite powders with spinel structure were synthesized by low-heating solid-state reaction method.FT-IR spectra,DSC-TG and XRD techniques were employed to investigate the solid-state reaction and the thermal decomposition of the gel precursors.The results showed that the metal nitrates could react with the tartaric acid by grinding for 30 min.The results of X-ray diffraction technique revealed that NiCuZn ferrite powders were of the single spinel phase and the spinel crystal st...

关 键 词：低热固相反应 酒石酸 NICUZN铁氧体 

分 类 号：O611.4[理学—无机化学]