放电等离子烧结Bi、Ce掺杂钇铁石榴石陶瓷的微观结构与磁性能  

Microstructure and Magnetic Properties of Bi,Ce-YIG Ceramic Sintered by Spark Plasma Sintering

作　　者：叶登建 代波[1] YE Dengjian;DAI Bo(State Key Laboratory of Environment-Friendly Energy Materials,School of Materials Science and Engineering,Southwest University of Science and Technology,Mianyang 621010,Sichuan,China)

机构地区：[1]西南科技大学材料科学与工程学院,环境友好能源材料国家重点实验室,四川绵阳621010

出　　处：《材料导报》2024年第4期33-37,共5页Materials Reports

基　　金：中国电子科技集团公司第九研究所揭榜挂帅项目(2022SK-007);西南科技大学环境友好能源材料国家重点实验室(21fksy27)。

摘　　要：钇铁石榴石(Y_(3)Fe_(5)O_(12),YIG)是一种立方晶体结构的软磁铁氧体材料。YIG具有法拉第效应、低的铁磁共振线宽,在微波磁光领域具有广阔的应用前景。采用球磨法,通过预烧成功制备Y_(2.6-x)Bi_(0.4)Ce_(x)Fe_(5)O_(12)(x=0.1,0.2)粉末,再利用放电等离子烧结(SPS)将其在较低温度下制备成陶瓷。采用X射线衍射仪对陶瓷表面和内层进行了物相分析,采用扫描电子显微镜对粉体和陶瓷形貌进行观察,采用振动样品磁强计对样品进行了静态磁性能测试。实验结果表明,由于Bi元素的掺入,预烧温度降低到1050℃。利用放电等离子烧结方法,在1050℃、60 MPa、保温4 min条件下制备出孔洞少、表观密度为5.3585 g/cm^(3)和5.4469 g/cm^(3)的Bi,Ce-YIG陶瓷,实现了Bi,Ce-YIG陶瓷的低温快速烧结。Ce的掺入提高了Y_(2.6-x)Bi_(0.4)Ce_(x)Fe_(5)O_(12)(x=0.1,0.2)粉末陶瓷的饱和磁化强度(分别为23.01 emu/g、25.96 emu/g),有利于磁光器件的小型化。Bi,Ce-YIG陶瓷的铁磁共振线宽最低为140.5 Oe,有利于器件在微波应用中的低损耗。Yttrium iron garnet(Y_(3)Fe_(5)O_(12),YIG)is a soft ferrite material with a cubic crystal structure.YIG has the Faraday effect and low ferromagnetic resonance linewidth,so it has broad application prospects in microwave magneto-optics.In this paper,Y_(2.6-x)Bi_(0.4)Ce_(x)Fe_(5)O_(12)(x=0.1,0.2)powder was successfully prepared by ball milling and pre-sintering,and then prepared into ceramics at lower temperature by spark plasma sintering(SPS).The phase analysis of the ceramic surface and inner layer was carried out by X-ray diffractometer,the morphology of powder and ceramic was observed by scanning electron microscope,and the static magnetic properties of the samples were tested by vibrating sample magnetometer.The experimental results show that the pre-sintering temperature is reduced to 1050℃due to the incorporation of Bi element.Using spark plasma sintering method,Bi,Ce-YIG ceramics with less pores and apparent densities of 5.3585 g/cm^(3)and 5.4469 g/cm^(3)were prepared at 1050℃,60 MPa,and holding time for 4 min.This paper realizes low temperature rapid sintering of YIG ceramics.The incorporation of Ce increases the saturation magnetization of Y_(2.6-x)Bi_(0.4)Ce_(x)Fe_(5)O_(12)(x=0.1,0.2)powder ceramics.The saturation magnetization of the powder is 23.01 emu/g and 25.96 emu/g,respectively,which is beneficial to the miniaturization of magneto-optical devices.The minimum ferromagnetic resonance linewidth of Bi,Ce-YIG ceramics is 140.5 Oe,which is beneficial to the low loss of the device in microwave applications.

关 键 词：钇铁石榴石 陶瓷 放电等离子烧结 低温快速烧结 静态磁性能 

分 类 号：O737[理学—晶体学]