硅酸盐学报

KTP晶体在磷酸盐助熔剂中的生长机制和结晶习性

作者：刘向阳蒋民华

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出版年,卷(期):页码：1988,16(4):345-350

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摘要：

本文描述在K_5,K_6和K_8磷酸盐助熔剂中对KTP晶体进行的一系列生长动力学实验并讨论了晶体生长速度随过饱和度的变化规律,导出了两者间的函数关系。结果倾向于小核二维成核的生长机制。这与晶体表面形貌观察结果一致。实验还表明,在固定过饱和度情况下,KTP晶体生长速度将随溶液中正磷酸盐相对含量增加而减少。KTP晶体结晶习性的变化主要受KTP在磷酸盐溶液中的中间产物状态变化的影响。

Some kinetic experiments of KTP in K_5, K_6 and K_8 phosphate fluxes were performed, and the variations of the crystal growth rate with the supersaturation are discussed in this paper. From the experimental data,a functional relationship between the growth rate and the supersaturation is derived. The growth mechanism of two dimensional nucleation of small nuclei is suggested. The mechanism is in agreement with the observation of surface morphology of KTP crystal. In addition, the experimental results indicate that the steady state growth rate of the interfaces decreases with the increase in relative quantities of orthophosphate in the solutions at the same supersaturation.The cause of the change in KTP crystalline habits is due to the variation of the state of the intermediate products in phosphate fluxes.

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参考文献：

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