Mn、Fe掺杂V_(2)SnC陶瓷的制备与磁性研究  

Preparation and Magnetic Properties of Mn and Fe Doped V_(2)SnC Ceramics

作　　者：卢子怡 王进军 杨天爱 黄江涛 严明 LU Ziyi;WANG Jinjun;YANG Tianai;HUANG Jiangtao;YAN Ming(College of Materials and Chemical Engineering,Hubei University of Technology,Wuhan 430068,Hubei,China;Hubei Provincial Key Laboratory of Green Materials for Light Industry,Wuhan 430068,Hubei,China;Collaborative Innovation Center of Green Light-weight Materials and Processing,Hubei University of Technology,Wuhan 430068,Hubei,China)

机构地区：[1]湖北工业大学材料与化学工程学院,湖北武汉430068 [2]湖北省绿色轻工材料重点实验室,湖北武汉430068 [3]湖北工业大学绿色轻质材料与加工协同创新中心,湖北武汉430068

出　　处：《陶瓷学报》2024年第5期1022-1030,共9页Journal of Ceramics

基　　金：国家级大学生创新创业训练计划项目(202310500041);绿色轻工材料湖北省重点实验室开放基金(202307B07)。

摘　　要：MAX相是一种具有独特性能的层状三元碳化物和氮化物。通过在MAX相中掺杂过渡金属,并与之形成合金,可赋予其新特性的同时保持其本征结构。研究采用无压烧结,在V_(2)SnC中掺杂Mn、Fe原子,1000℃下无压烧结3 h,合成了磁性固溶体MAX相V_(2)(Mn_(x)Sn_(1-x))C、V_(2)(Fe_(x)Sn_(1-x))C及V_(2)(Mn_(x)Fe_(x)Sn_(1-2x))C。当总掺杂量为0.4时达到最大饱和度,继续添加固溶元素,产物纯度下降。SEM-EDS结果表明掺杂并未改变其原有层状形貌。磁性测试结果表明,V_(2)(A_(x)Sn_(1-x))C(A=Mn/Fe)是一种典型低温铁磁材料。V_(2)(Mn_(x)Sn_(1-x))C的磁滞回线宽,为典型硬磁材料,矫顽力达1428 Oe;V_(2)(Fe_(x)Sn_(1-x))C则表现出较低矫顽特性,为软磁材料,且当x=0.2或x=0.4时均未表现出铁磁性,当x=0.6时,居里温度仅为42 K;V_(2)(Mn_(x)Fe_(x)Sn_(1-2x))C磁化曲线表现在居里温度为61 K时由铁磁转变为顺磁,磁滞回线表现出其具有软磁材料的特性,且磁饱和强度达到3.80 emu·g^(-1)。The MAX phase is a layered ternary carbide and nitride with unique properties,in which doping with transition metals can be utilized to give it new properties using alloying while ensuring its intrinsic structure.In this study,the magnetic solid solution MAX phases V_(2)(Mn_(x)Sn_(1−x))C,V_(2)(Fe_(x)Sn_(1−x))C and V_(2)(Mn_(x)Fe_(x)Sn_(1−2x))C were synthesized by pressureless sintering in V_(2)SnC doped with Mn and Fe atoms and pressureless sintering for 3 h at 1000℃.The maximum saturation was reached when the total doping amount was 0.4,while purity of the product decreased with the addition of solid solution elements.SEM-EDS results showed that the doping did not change the original lamellar morphology.The magnetic test results show that V_(2)(Mn_(x)Sn_(1−x))C(A=Mn/Fe)is a typical low-temperature ferromagnetic material.V_(2)(Mn_(x)Sn_(1−x))C has a wide hysteresis loop and is a typical hard magnetic material with a coercivity of 1428 Oe,while V_(2)(Fe_(x)Sn_(1−x))C shows lower coercive properties and is a soft magnetic material,and does not show ferromagnetism at x=0.2 and x=0.4,and the Curie temperature at x=0.6 is only 42 K.The magnetization curve of V_(2)(Mn_(x)Fe_(x)Sn_(1−2x))C shows a transition from ferromagnetism to paramagnetism at a Curie temperature of 61 K,and the hysteresis loop shows that it has a ferromagnetic property.The magnetization curve of V_(2)(Mn_(x)Fe_(x)Sn_(1−2x))C shows a transition from ferromagnetism to paramagnetism at a Curie temperature of 61 K.The hysteresis line shows that it has the properties of a soft magnetic material and the magnetic saturation strength reaches 3.80 emu·g^(−1).

关 键 词：MAX相 V_(2)SnC 掺杂 固溶体 磁性 

分 类 号：TQ174.75[化学工程—陶瓷工业]