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掺钕钨酸钆钠晶体生长、结构及光谱特性
作者:林海 张莹 李春 曾繁明 秦杰明 MAUROTonelli 刘景和  
单位:长春理工大学材料科学与工程学院 意大利比萨大学物理系  
关键词:掺钕钨酸钆钠晶体  提拉法  红外光谱  Raman光谱  吸收光谱 
分类号:O782
出版年,卷(期):页码:2010,38(2):177-182
DOI:
摘要:

采用提拉法生长了尺寸为φ(30~35)mm×80mm的掺钕钨酸钆钠[Nd:NaGd(WO4)2,Nd:NGW]晶体。生长Nd:NGW晶体的最佳工艺参数为:晶体的提拉速率为1~2mm/h,晶体转速为15~18r/min,冷却速率为10℃/h,液面上轴向温度梯度为0.7~1℃/mm。通过热重-差热分析(thermogravimetry-differential thermal analysis,TG-DTA),X射线衍射(X-ray diffraction,XRD)对晶体进行表征。测试了晶体的红外及Raman光谱,分析了晶体的振动模式,并将晶体振动光谱进行归属。由TG-DTA曲线得到晶体熔点为1251.7℃。XRD分析表明:晶体属于四方晶系、白钨矿结构、I41/a空间群,晶胞参数a=0.53213nm,c=1.13070nm。吸收光谱表明:Nd:NGW晶体在805nm附近有较强、较宽的吸收峰,吸收截面积为3.581×10-20cm2,适合于激光二极管泵浦。

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Nd:NaGd(WO4)2 (Nd:NGW) single crystals with 30-35 mm in diameter and 80 mm long were grown by Czochralski method.The optimal growth parameters of the Nd:NGW crystal are:a pulling rates of 1-2 mm/h,a rotation rate of 15-18 r/min,a cooling speed of 10 ℃ /h and an axial temperature gradient on the solid-liquid interface of 0.7-1 ℃ /mm.The crystal was characterized by thermogravimetry-differential thermal analysis (TG-DTA) and X-ray diffraction (XRD).The infrared (IR) spectra and Raman spectra of the crystal were measured,and vibration frequencies of IR and Raman active modes for the crystal were assigned.TG-DTA curves indicate that the melting point of the Nd:NGW crystal is 1 251.7 ℃.The XRD analysis shows that the Nd:NGW crystal belongs to a tetragonal system with a scheelite-type structure and a space group I41/a,and the lattice parameters of the crystal are a=0.532 13 nm and c=1.130 70 nm.Absorption optical spectra of the Nd:NGW crystal show that there is better and wider absorb peak at about 805 nm,and the absorption cross-section of crystal sample is calculated to be 3.581 × 10-20cm2,which is suitable for laser diode pumping.

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[1]臧竞存,郑锴,邹玉林,等.掺铥钨酸盐晶体的光谱研究[J].光散射学报,2008,20(2):178-181.ZANG Jingcun,ZHENG Kai,ZOU Yulin,et al.J Light Scattering(in Chinese),2008,20(2):178-181 [2]葛文伟,张怀金,王继扬,等.BaWO4多晶料的合成与优质单晶的生长[J].人工晶体学报,2005,34(1):38-42.GE Wenwei,ZHANG Huaijin,WANG Jiyang,et al.J Synth Cryst(in Chinese),2005,34(1):38-42. [3]刘景和,李建利,洪元佳,等.Nd:KGd(WO4)2激光晶体生长[J].硅酸盐学报,2001,29(2):254-257.LIU Jinghe,LI Jianli,HONG Yuanjia,et al.J Chin Ceram Soc(in Chinese),2001,29(2):254-257. [4]FAURE N B,COUGHAUD C,BASSET M,et al.Optical properties and laser performance of neodymium doped scheelites CaWO4and NaGd(WO4)2[J].Appl Phys Lasers Opt,1996,B63(6):593-598. [5]程振祥,路庆明,孔勇发,等.功能晶体材料NaEr(WO4)2单晶的生长与性能研究[J].光电子·激光,2001,12(1):98-100.CHENG Zhengxiang,LU Qingming,KONG Yongfa,et al.J Opto-celectron Laser(in Chinese),2001,12(1):98-100. [6]刘景和,李建利,徐斌,等.NaBi(WO4)2晶体生长与开裂研究[J].硅酸盐学报,2001,29(3):370-373.LIU Jinghe,LI Jianli,XU Bin,et al.J Chin Ceram Soc(in Chinese),2001,29(3):370-373. [7]朱忠丽.掺稀土复合钨酸钠盐晶体生长与性能研究[D].长春:长春理工大学,2005.ZHU Zhongli.Study on crystal growth and properties of rare earth doped compound tungstate including sodium(in Chinese,dissertation).Changchun:Changchun University of Science and Technology,2005. [8]王步国,施尔畏,仲维卓,等.钨酸盐晶体中负离子配位多面体的结晶方位与晶体的形貌[J].无机材料学报,1998,13(5):648-654.WANG Buguo,SHI Erwei,ZHONG Weizhuo,et al.J Inorg Mater(in Chinese),1998,13(5):648-654. [9]HANUZA J,MACZKA M,VANDERMASS J H.Vibrational proper-ties of double tungstates of the MⅠMⅡ(WO4)2family(MⅠ=Li,Na,K;MⅢ=Bi,Cr)[J].J Solid State Chem,1995,117:177-188. [10]朱忠丽,林海,孙彧,等.Nd:NaR(WO4)2晶体光谱性能研究(R=Bi,Y)[J].稀有金属材料与工程,2006,35(3):399-402.ZHU Zhongli,LIN Hai,SUN Yu,et al.Rare Met Mater Eng(in Chi-nese),2006,35(3):399-402. [11]KAMINSKII A A,EICHLER H J,UEDA K,et al.Properties of Nd3+-doped and undoped tetragonal PbWO4,NaY(WO4)2,CaWO4,and un-doped monoclinic ZnWO4and CdWO4as laser-active and stimulated Raman scattering-active crystals[J].Appl Opt,1999,38(21):4533-4547. [12]兰建明,陈建中,郭飞云,等.Yb:YVO4晶体的生长及光谱性能研究[J].人工晶体学报,2003,32(1):44-49.LAN Jianming,CHEN Jianzhong,GUO Yunfei,et al.J Synth Cryst(in Chinese),2003,32(1):44-49.

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