掺铋钇铁石榴石磁光陶瓷的热压烧结及其性能研究  

Microstructure and Properties of Bi-doped Yttrium Iron Garnet Magneto-optical Ceramics Prepared by Hot-pressing Sintering Process

作　　者：邹顺 何夕云[1] 曾霞[1] 仇萍荪[1] 凌亮 孙大志 ZOU Shun;HE Xiyun;ZENG Xia;QIU Pingsun;LING Liang;SUN Dazhi(Shanghai Institute of Ceramics,Chinese Academy of Sciences,Shanghai 200050,China;College of Chemistry and Materials Science,Shanghai Normal University,Shanghai 200234,China)

机构地区：[1]中国科学院上海硅酸盐研究所,上海200050 [2]上海师范大学化学与材料科学学院,上海200234

出　　处：《无机材料学报》2022年第7期773-779,共7页Journal of Inorganic Materials

摘　　要：钇铁石榴石(Y_(3)Fe_(5)O_(12),YIG)材料因其优异的磁性能和磁光性能在微波通信、激光技术和光纤通讯等领域具有重要应用。离子掺杂是提高YIG材料磁光性能的有效途径之一,本研究选择离子半径适配的Bi^(3+)掺杂改性YIG陶瓷以提高材料的磁光性能。本工作采用固相法热压烧结制备Bi_(x)Y_(3–x)Fe_(5)O_(12)(x=0、0.3、0.6、0.9)陶瓷,并研究Bi^(3+)掺杂对YIG陶瓷材料相结构、微观形貌、红外透过性、磁性能以及磁光性能的影响。结果表明:陶瓷样品均呈石榴石立方相结构;显微结构致密,Bi^(3+)掺杂后晶粒尺寸不同程度增大;样品红外透过率良好,随Bi^(3+)掺杂量增大而降低;陶瓷样品的法拉第旋转角随Bi^(3+)掺杂量增加呈线性变化,Bi^(3+)掺杂量每增加1%(原子分数),在波长1064 nm和1550 nm处变化量分别约为–49.0(°)/cm和–30.2(°)/cm。Bi_(0.6)Y_(2.4)Fe_(5)O_(12)陶瓷样品在1064 nm和1550 nm波长下法拉第旋转角分别达到–703.3(°)/cm和–461.5(°)/cm,绝对值远高于未掺杂YIG陶瓷的277.6(°)/cm和172.0(°)/cm。由此可见,掺杂适量Bi^(3+)可以显著增强YIG陶瓷材料的磁光性能。Yttrium iron garnet(Y_(3)Fe_(5)O_(12),YIG)materials with excellent magnetic and magneto-optical performances have been widely used in various fields such as the microwave communication,laser technology and optical fiber communication.Ion doping is considered as an effective method to improve the magneto-optical performance of YIG materials.In this study,Bi^(3+)with appropriate ion radius were selected to modify YIG ceramics to improve the magneto-optical properties of the materials.A series of Bi_(x)Y_(3–x)Fe_(5)O_(12)(x=0,0.3,0.6,0.9)ceramics were prepared by the hot-pressing sintering process with the solid-state reaction.Phase structure,micro-morphology,infrared transmittance,magnetic and magneto-optical properties of the sintered Bi_(x)Y_(3–x)Fe_(5)O_(12)(x=0,0.3,0.6,0.9)ceramics were investigated.All sintered Bi^(3+)-doped YIG ceramic samples exhibit the pure garnet phase structure with dense microstructure,and the grain size increases with Bi^(3+)doping.The infrared transmittance of the sample is good,but it decreases with the increase of Bi^(3+)doping content.The Faraday rotation angle of the YIG ceramic sample changes linearly with the Bi^(3+)content increase.When the Bi^(3+)content increases about 1%(in atom),Faraday rotation angle changes about-49.0(°)/cm and-30.2(°)/cm at 1064 nm and 1550 nm wavelengths,respectively.Faraday rotation angles of Bi_(0.6)Y_(2.4)Fe_(5)O_(12) ceramic sample at wavelengths of 1064 nm and 1550 nm are-703.3(°)/cm and-461.5(°)/cm,respectively,which are much higher than that of the undoped YIG ceramics(277.6(°)/cm and 172.0(°)/cm,respectively).The magneto-optical performance of YIG ceramics is enhanced obviously by the Bi^(3+)doping.

关 键 词：钇铁石榴石 磁光陶瓷 铋掺杂 红外透光率 法拉第旋转 

分 类 号：TM284[一般工业技术—材料科学与工程]