【摘要】 采用顶部籽晶提拉法,以K2W2O7为助溶剂,生长了YbKY(WO4)2新型激光晶体.经热重-差热分析,确定晶体熔点为1045℃,相变温度为1010℃.X射线粉末衍射测试,验证所生长的晶体为β-YbKY(WO4)2.晶体结构分析确定YbKY(WO4)2晶体由WO6八面体连接而成,WO6八面体是由双氧桥(WOOW)及单氧桥(WOW)构成.晶体粉末样品室温下的红外及拉曼光谱测试,确定WO6原子基团、双氧桥及单氧桥的振动频率.晶体的吸收峰位于940nm,980nm,发射峰位于989nm—1030nm.更多还原

【Abstract】 The selection of the flux and the design of the proper process are the key factors for the growth of Yb:KY（WO₄）₂ laser crystal. Yb:KY（WO₄）₂ crystal is grown by top seeded solvent growth （TSSG） method using K₂W₂O₇ as a suitable flux. On the basis of TG-DTA,which has two obvious absorption peaks at 1045℃ and 1010℃,the Yb:KY（WO₄）₂ crystal’s melting point is 1045℃,phase transition point from tetragonal system to monoclinic system is at 1040℃. Analyzing the X-ray diffraction spectrum of Yb:KY（WO₄）₂ crystal powder sample,we can conclude that the β-Yb:KY（WO₄）₂ crystal is of monoclinic system,and C2/c space group. The Yb:KY（WO₄）₂ crystals structure forms from the WO₆ octahedra joined by WOOW double oxygen bridges and WOW single bridges. The IR and Raman spectra showed,the atom group WO₆ has flex vibrations at 931cm -1 ,925cm -1 ,891cm -1 and 840cm -1 ,and bend vibrations at 395cm -1 ,369cm -1 ,346cm -1 and 312cm -1 ,the WOOW double oxygen bridge has vibrations at 901cm -1 ,759cm -1 ,686cm -1 ,435cm -1 ,496cm -1 and 298cm -1 ,and the WOW single bridges has vibrations at 809cm -1 ,525cm -1 and 235cm -1 . At room temperature,the absorption peaks are at 940nm and 980nm the emission peaks are at 989nm—1030nm.更多还原