Potassium–yttrium tungstate single crystals KYb_xY_1–x(WO₄)₂ of high structural quality are grown by the modified Czochralski method. The crystals were grown using so-called dynamic growth regime, and optimal temperature gradients at the crystallization front were determined. The thermal expansion coefficients of KYb_xY_1–x(WO₄)₂ in the directions of the optical indicatrix axes N_p, N_m and N_g are determined using the dilatometric technique. The dependence of thermal expansion coefficients on the temperature in the range of 330–573 K and ytterbium content x from 0 to 1.0 is discussed.

中文翻译：

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单斜晶 KYbxY1–x(WO4)2 激光晶体的热膨胀

采用改良直拉法生长出高结构质量的钨酸钾钇单晶 KYb _x Y _1–x (WO ₄ ) ₂ 。使用所谓的动态生长机制来生长晶体，并确定结晶前沿的最佳温度梯度。 KYb _x Y _1–x (WO ₄ ) ₂ 在光指标体轴方向 N _p 、N _m 和N _g 使用膨胀技术测定。讨论了热膨胀系数对 330-573 K 范围内的温度和 0 至 1.0 范围内的镱含量 x 的依赖性。