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用顶部籽晶提拉法(top seeded solution growth,TSSG)生长出Ybx:KY1-x(WO4)2(x=5%,摩尔分数,下同)和KYb(WO4)2晶体,比较了两者的结构和光谱性能。工艺参数:转速为10—15r/min,提拉速率为1—2mm/d,生长周期为10—15d,降温生长速率为0.05—0.1℃/h,降温速率为20℃/h。X射线衍射分析表明:两者均为低温相的β-KYW结构,计算了2种晶体的晶格常数。测试了红外及Raman光谱,Ybx:KY1-xW(x=5%)样品在925,891,840,777,749 cm-1具有较强的红外吸收峰,是由WO4原子基团伸缩振动引起的;KYbW样品在484,437 cm-1处具有较强的红外吸收峰,反映了WO4原子基团的弯曲振动。分析了晶体的振动模式,认为2种晶体有较强的Raman活性,钨氧双桥键WOOW和单桥键WOW基团的振动在200～1 000 cm-1范围内,对峰值与相应的振动进行了指认。
Ybx: KY1-x (WO4) 2 (x = 5%, mole fraction, the same below) and KYb (WO4) 2 crystals were grown with top seeded solution growth (TSSG) The structure and spectral properties. Process parameters: speed of 10-15r / min, pulling rate of 1-2mm / d, the growth period of 10-15d, cooling growth rate of 0.05-0.1 ℃ / h, cooling rate of 20 ℃ / h. X-ray diffraction analysis shows that both of them are β-KYW structures in the low temperature phase, and the lattice constants of the two kinds of crystals are calculated. The infrared and Raman spectra of Ybx: KY1-xW (x = 5%) samples were observed at 925,891,840,777,749 cm-1, which were caused by the stretching vibration of WO4 groups. The KYbW samples were observed at 484,437 cm-1 Department has a strong infrared absorption peak, reflecting the flexural vibration WO4 atomic groups. The vibrational modes of the crystals were analyzed. The Raman activity of the two kinds of crystals was considered. The vibration of WOOW and WOW groups in the range of 200-1 000 cm-1 for the WOOW bridge and the corresponding vibration Have been identified.