摘要
本文采用化学共沉淀法合成了5%(原子数分数,下同)Yb∶CaF_(2)纳米粉体。经过冷冻干燥后,粉体的团聚程度有所减轻,粉体呈立方片层状,平均颗粒尺寸约为40 nm。以冷冻干燥后的粉体为原料,通过热压烧结结合热等静压(HIP)烧结后处理制备了高光学质量的5%Yb∶CaF_(2)透明陶瓷。分析了热压烧结过程中样品的致密化行为,并对陶瓷的显微结构、直线透过率、吸收光谱及激光性能进行测试与表征。结果表明,陶瓷坯体在热压烧结时的保温阶段存在致密化驱动力的激活阈值,同时HIP后处理能够进一步压缩和排除热压陶瓷内残留气孔,有效提高陶瓷的光学质量。通过热压烧结(625℃×2 h,50 MPa)结合HIP后处理(600℃×3 h,100 MPa Ar)制备的5%Yb∶CaF_(2)透明陶瓷在400和1200 nm处的直线透过率分别为72.6%和92.2%(厚度2 mm),其在976 nm处的吸收截面为0.52×10^(-20)cm^(2)。使用波长为930 nm的光纤耦合二极管激光器(LD)端面泵浦Yb∶CaF_(2)透明陶瓷,获得了最大输出功率为0.81 W、斜率效率为9.7%的准连续激光输出。
The 5%(atomic fraction)Yb∶CaF_(2)nano-powders were synthesized by chemical co-precipitation method.Following freeze-drying,the agglomeration degree of the powders reduces,and the powders exhibit cubic lamellar structures with an average particle size of approximately 40 nm.High optical quality 5%Yb∶CaF_(2)transparent ceramics were subsequently fabricated through hot pressing,supplemented by hot isostatic pressing(HIP)sintering as a post-treatment,utilizing the freeze-dried powders.The densification behaviour of the samples during the hot pressing process was investigated.The microstructure,in-line transmittance,absorption spectra,and laser performance of the ceramics were assessed and analyzed.The findings indicate that activation threshold of densification driving force occurs during the holding stage of the hot pressing process,and the HIP post-treatment effectively compresses and removes residual pores within the hot pressed ceramics,thereby significantly enhancing their optical quality.The in-line transmittance of the 5%Yb∶CaF_(2)transparent ceramics,produced through hot pressing(625℃×2 h,50 MPa)followed by HIP post-treatment(600℃×3 h,100 MPa Ar),is 72.6%and 92.2%at 400 and 1200 nm,respectively,with a thickness of 2 mm.Additionally,the absorption cross-section at 976 nm is determined to be 0.52×10^(-20)cm^(2).A fiber-coupled diode laser(LD)with a wavelength of 930 nm served as the pumping source for end-face pumping of the Yb∶CaF_(2)transparent ceramics,obtaining a quasi-continuous laser output with a peak power of 0.81 W and a slope efficiency of 9.7%.
作者
刘强
李想
郭礼豪
TOCI Guido
PIRRI Angela
PATRIZI Barbara
VANNINI Matteo
吴俊林
李江
LIU Qiang;LI Xiang;GUO Lihao;TOCI Guido;PIRRI Angela;PATRIZI Barbara;VANNINI Matteo;WU Junlin;LI Jiang(College of Materials Science and Engineering,Jiangsu University,Zhenjiang 212013,China;Transparent Ceramics Research Center,Shanghai Institute of Ceramics,Chinese Academy of Sciences,Shanghai 201899,China;Center of Materials Science and Optoelectronics Engineering,University of Chinese Academy of Sciences,Beijing 100049,China;National Institute of Optics,Italian National Research Council,Florence 50019,Italy;Institute of Applied Physics“Nello Carrara”,Italian National Research Council,Florence 50019,Italy)
出处
《人工晶体学报》
CAS
北大核心
2024年第11期1918-1926,共9页
Journal of Synthetic Crystals
基金
国家重点研发计划(2023YFB3812000)
中国科学院国际伙伴计划(121631KYSB20200039)。
关键词
Yb∶CaF_(2)透明陶瓷
热压烧结
热等静压烧结
显微结构
激光性能
Yb∶CaF_(2)transparent ceramics
hot pressing sintering
hot isostatic pressing sintering
microstructure
laser performance
作者简介
刘强(1964-),男,江苏省人,工学博士,江苏大学材料科学与工程学院教授,硕士生导师。主要从事材料强韧化、透明陶瓷及生物医用材料等方面的研究。负责或参与完成了国家自然科学基金4项,江苏省自然科学基金1项,江苏省高校自然科学基金2项,承担完成了企业产学研合作项目10余项。发表学术论文40余篇,其中SCI收录论文20余篇。围绕材料强韧化、透明陶瓷、生物医用材料等方向,完成了江苏省教育厅教改课题1项,在江苏省精品教材立项建设项目及学校“十二五”国家级规划教材项目的支持下,主编了《材料物理性能》教材,获国家教学成果二等奖1项。E-mail:lq88611338@163.com;通信作者:李江,博士,中国科学院上海硅酸盐研究所研究员、博士生导师,国家重点研发计划项目首席科学家。《人工晶体学报》编委。主要从事光学与光功能透明陶瓷(包括:激光陶瓷、闪烁陶瓷、磁光陶瓷、荧光陶瓷等)的基础与应用研究。连续4年入选美国斯坦福大学发布的“终身科学影响力排行榜”(全球前2%顶尖科学家榜单)。受邀在国内外重要学术会议上作邀请报告60余次(担任分会主席20余次)。以项目负责人身份承担国家及省部级项目20余项。迄今在国内外重要学术期刊上发表论文453篇(其中第一及通信作者282篇),合著科学出版社专著《高温结构陶瓷研究浅论》和《先进光功能透明陶瓷》2部,合译高等教育出版社专著《发光材料》1部,参与2部英文专著部分章节的撰写,参与教材《无机非金属材料工学》第19章《透明陶瓷》的撰写,申请中国发明专利50余项(其中授权25项)。E-mail:lijiang@mail.sic.ac.cn。
