标题：Growth, morphology and anisotropic thermal properties of Nd-doped Sr3Y2(BO3)4crystal
作者：Pan, Zhongben ;Cong, Hengjiang ;Yu, Haohai ;Zhang, Huaijin ;Wang, Jiyang ;Boughton, Robert I.
作者机构：[Pan, Zhongben ;Cong, Hengjiang ;Yu, Haohai ;Zhang, Huaijin ;Wang, Jiyang ] State Key Laboratory of Crystal Materials, Institute of Crystal Materials, 更多
来源：Journal of Crystal Growth
摘要：A high-quality Nd3+:Sr3Y2(BO3)4laser crystal has been grown by the Czochralski method. The phase purity and accurate unit cell parameters were determined using X-ray powder diffraction; the unit cell parameters are calculated to be a=7.3933 (1) A˚, b=15.9461 (2) A˚, c=8.6967 (1) A˚, and V=1025.29 (5) A˚3. Effective segregation coefficients were measured and the optical homogeneity was further characterized by interferometry. A series of possible growth faces (hkl) were also deduced and compared with the asgrown crystal boules using the Bravais-Friedel-Donnay-Harker (BFDH) theory. A full set of thermal properties, including the thermal expansion, thermal diffusivity, specific heat, and thermal conductivity, were measured as a function of temperature. The average linear thermal expansion coefficients along different crystallographic directions were measured to be α11=7. 04×10-6K-1, α22=15. 32×10-6K-1and α33=14. 35×10-6K-1over the temperature range 303.15-770.15 K. The specific heat was measured to be 0.573 J g-1K-1(92.64 calmol-1K-1) at 330 K. The thermal conductivity at room temperature was calculated to be 0.74Wm-1K-1, 1.00 Wm-1K-1, and 0.67 Wm-1K-1along the a-, b- and c-axis, respectively. It was found that thermal conductivity increases with increasing temperature, which indicates a glass-like behavior. © 2012 Elsevier B.V. All rights reserved.