柠檬酸盐自蔓延法低温烧结MnZn铁氧体  

Low Sintering Temperature MnZn-ferrite by Citrate Auto-Combustion Method

作　　者：侯军刚[1] 马卫兵[1] 孙凤云[1] 王胜军[1] 孙清池[1] 

机构地区：[1]天津大学先进陶瓷与加工技术教育部重点实验室,天津300072

出　　处：《压电与声光》2007年第5期571-573,576,共4页Piezoelectrics & Acoustooptics

摘　　要：以硝酸铁、硝酸锌、硝酸锰和柠檬酸为原料,利用干凝胶自蔓延燃烧工艺合成纳米级MnZn铁氧体粉体,X-衍射（XRD）分析了粉体的晶体结构。通过纳米粉体及添加助烧剂,低温合成了一系列的Mn0.6Zn0.4Fe2O4＋xBi2O3/CuO/（CuO-Bi2O3）铁氧体（x=0-5%,质量分数）。利用扫描电子显微镜（SEM）、振动样品磁强计（VSM）研究了烧结MnZn铁氧体的成相、致密化和磁性能。实验结果表明,通过制备纳米级MnZn铁氧体粉体、离子代换及添加助溶剂的作用可明显降低烧结温度,有利于控制MnZn铁氧体化学成分和显微结构,改善铁氧体的磁性能,有望用作LTCC材料。Soft magnetic MnZn ferrite nanopartieles were prepared by a novel citrate auto-combustion method using Mn（NO3）2,Fe（NO3）3·9H2O, and Zn（NO3）2·6H2O dissolved in water and citric acid. The powder was charactered by X-ray diffraction（XRD）. At 850-950℃, the effects of Mn0.6Zn0.4Fe2O4＋xBi2O3/CuO/（CuO-Bi2O3） on phase formation, densification process, and magnetic properties were further studied by scanning electron microscope （SEM） and vibrating sample magnetomerter （VSM）. The experimental results showed that it was helpful to low the sintering temperature, control chemical ingredient and microstructure and improve magnetic properties of MnZn ferrite by preparing the nanopartical powers, substituting ions and doping additives. It was also proven that MnZn ferrite at the low sintering temperature is the most potential candidate LTCC material.

关 键 词：MNZN铁氧体 柠檬酸盐自蔓延 低温烧结 磁性能 

分 类 号：TM282[一般工业技术—材料科学与工程]