关键词:

正交试验法, 流动溶液, 单晶生长动力学, 维生素C

Abstract: The growth of vitamin C single crystals was studied by direct observation. In flowing solution, the linear growth rates of three orientations (［010］, ［001］, ［100］) were measured for vitamin C-water system. The experiments were designed as orthogonal test to investigate the effect of various factors. Comparing with temperature and velocity, supersaturation is the most important factor. And the relations between growth and supersaturation were different with crystal directions, which obviously show anisotropy. The order of magnitude of G_［010］, G_［001］, G_［100］ and their dependency on supersaturation (g_［010］,g_［001］, g_［100］) were in good agreement with analysis of maximum difference. The effect of solution diffusion could be neglected and crystal growth was controlled by surface reaction. According to the growth models, the growth mechanism was discussed.

Key words:

正交试验法, 流动溶液, 单晶生长动力学, 维生素C