摘要
采用化学沉淀法合成了SrF_(2)粉末原料,真空热压烧结制备了不同YF_(3)掺杂量的Pr,Y:SrF_(2)透明陶瓷,研究了缓冲离子(Y^(3+))对Pr:SrF_(2)透明陶瓷透过率、显微结构及光谱特性的影响。结果表明,陶瓷样品具有较高的光学质量,YF_(3)掺杂量为5.0%(质量分数)的Pr,Y:SrF_(2)陶瓷具有最高的透过率,其400 nm和1 200 nm波长处的透过率分别为90.1%和89.4%。高掺杂量下,Y^(3+)能够显著的促进陶瓷晶粒的生长,当YF_(3)掺杂量为10.0%时,陶瓷的晶粒尺寸超过200μm。此外,Y^(3+)缓冲离子可以有效提高透明陶瓷的吸收能力,并通过改变陶瓷基体内Pr^(3+)的团簇及局域配位结构,调控Pr,Y:SrF_(2)透明陶瓷的光谱特性。
Introduction The lattice environment of low phonon energy of strontium fluoride can suppress the energy loss caused by non-radiation process of trivalent lanthanide ions,so it is an ideal matrix material for active-ions doping.The fabrication and spectroscopic properties of SrF_(2)transparent ceramics doped with trivalent lanthanide ions have attracted recent attention.Trivalent lanthanide ions tend to form clusters in SrF_(2)crystal lattice,and the distance between ions shortens,resulting in energy exchange process and concentration quenching within these clusters,especially for rare-earth ions with a rich energy level structure.The concentration quenching effect leads to a reduction in luminescence intensity,and their applications are limited to a certain extent.Co-doping buffer ions into Pr:SrF_(2)system is an effective solution to alleviate the concentration quenching of Pr^(3+)luminescence intensity.In this paper,Y^(3+)ions were selected as buffer ions.SrF_(2)raw powder was synthesized by a chemical precipitation method,and Pr^(3+)and Y^(3+)ions co-doped SrF_(2)transparent ceramic were fabricated in vacuum by a hot pressing(HP)sintering technology.The effect of Y^(3+)doping levels on the microstructure and luminescence spectroscopic characteristics of Pr,Y:SrF_(2)transparent ceramics was discussed to regulate the luminescence properties of Pr^(3+)in SrF_(2)transparent ceramics.Methods SrF_(2)particles were synthesized by a chemical precipitation method with commercial strontium nitrate and potassium fluoride reagents.Cationic(Sr^(2+))and anion(F^(-))solutions were prepared,and then separated via high-speed centrifugation after washing for three times.The as-synthesized SrF_(2)particles were mixed with commercial available PrF_(3)and YF_(3)particles,where the doping level of PrF_(3)was fixed at 3.0%and the level of YF_(3) was varied from 0 to 10.0%.Pr,Y:SrF_(2)transparent ceramics were fabricated in vacuum by a hot pressing sintering technology.The sintering temperature was 1000℃,the pressure was 30 MPa and
作者
刘作冬
李思雅
潘其悦
王嘉顺
曹悦
于永生
刘鹏
井强山
LIU Zuodong;LI Siya;PAN Qiyue;WANG Jiashun;CAO Yue;YU Yongsheng;LIU Peng;JIN Qiangshan(Henan Key Laboratory of Utilization of Non-metallic Mineral in the South of Henan,Xinyang Normal University,Xinyang 464000,Henan,China)
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
2024年第3期765-773,共9页
Journal of The Chinese Ceramic Society
基金
国家自然科学基金项目(62305281)
河南省科技攻关项目(212102210575)
河南省高等学校重点科研项目计划(23A430021)。
关键词
透明陶瓷
氟化锶
镨
钇
transparent ceramic
strontium fluorides
praseodymium
yttrium
