(Zn_(0.3_Co_(0.7))_2-W型钡铁氧体分析及制备工艺  

Analysis and preparation technique of (Zn_(0.3)Co_(0.7))_2-W type barium ferrite

作　　者：熊征[1] 朱锡[1] 张立军[1] 

机构地区：[1]海军工程大学船舶与动力学院,湖北武汉430033

出　　处：《兵器材料科学与工程》2011年第4期1-4,共4页Ordnance Material Science and Engineering

基　　金：国家自然科学基金资助项目(50979110)

摘　　要：研究W型钡铁氧体BaZn0.6Co1.4Fe16O27的相形成过程及其最佳制备工艺。利用化学共沉与高温助熔法,采用不同热处理工艺制备多种铁氧体产物。借助FEI Quanta 400型扫描电子显微镜、EDAX型能量色散谱仪、DX-1000型X射线衍射仪和AV3618型微波网络矢量仪对各产物微观形貌、元素组成、晶体结构、物相以及电磁参数进行分析和测试。结果表明:烧结过程中,1000℃以前主要是尖晶石型铁氧体和M型铁氧体形成的过程;1000～1100℃时尖晶石型铁氧体和M型铁氧体开始反应生成W型铁氧体;1100～1250℃为W铁氧体大量形成的过程;1250～1300℃为W型铁氧体晶粒畸形发育的过程。由此确定了化学共沉与高温助熔法制备该铁氧体的最佳热处理工艺:1250℃下保温1h。The phase formation and the optimum preparation technique of W-type barium hexaferrite BaZn0.6Co1.4Fe16O27 were studied. Various products were prepared by the copreeipitation method combined with high temperature melting under different heat treatments. The mierostructure, element composition, crystal structure, phases and electromagnetic properties of each product were analyzed by FEI Quanta 400 SEM, EDAX EDS, DX-1000 XRD and AV3618 microwave vector network analyzer. The results show that in the procedure of sintering, spinel ferrite and M-type ferrite are formed at the temperature below 1 000 ℃; W-type ferrite begins to emerge at 1 000-1 100 ℃ and generates massively at 1 100-1 250 ℃ grains of W-type ferrite develop deformedly at 1 250-1 300 ℃. The optimum heat treatment condition of holding at 1 250℃ for 1 hour is confirmed.

关 键 词：W型铁氧体 BaZn0.6Co1.4Fe16O27 化学共沉 热处理 

分 类 号：TQ153.3[化学工程—电化学工业]