用于滤波器的圆柱形硫酸镍晶体的定向生长

Directional Growth of Cylindrical α-NiSO_4·6H_2O Crystal for Ultraviolet Filters

为了提高硫酸镍晶体的生长效率和晶体制做滤波器元件的效率 ,我们发现一种生长圆柱形硫酸镍晶体α -NSH(α -NiSO4 ·6H2 O)的新方法。用溶液降温法生长出直径 30～ 4 0mm ,长 4 0mm的圆柱形大单晶 ,晶体 (0 0 1)方向的生长速度控制在 1～ 1.5mm/d。该法生长的圆柱形晶体在紫外波段有优良的光学性能 ,定向生长与一般的传统方法相比较 ,除了提高晶体生长效率 6倍外 ,在制做滤光器元件的效率、时间和成本都有显著的优点。

In order to improve the efficiency of crystal growth and the element applied for filter.We discover a new method of directional growth for cylindrical α NSH( α NiSO 4·6H 2O)crystals.Large cylindrical crystals with the diameter of 30 40 mm and the length 40mm have been grown by the cooling aqueous solution.The growth rate in (001) direction is controlled at 1- 1.5 mm/d.It is shown that the crystals grown by directional method has excellent optical qualities at UV region.By comparison to the traditional growth method,this method can not only improve the efficiency of the crystal growth by 6 times,but also has more prominent advantages on the efficiency,time and cost for facture of the filter element than the traditional growth method.