人工可控氢氧化镁晶须生长  

Artificial Controlled Crystal Growth of Magnesium Hydroxide Whisker

作　　者：吴健松[1] 梁海群 

机构地区：[1]湛江师范学院化学科学与技术学院,湛江524048 [2]广东省高州市第一中学,高州525200

出　　处：《人工晶体学报》2013年第2期299-304,共6页Journal of Synthetic Crystals

基　　金：国家自然科学基金(40976074)

摘　　要：从负离子配位多面体生长基元模型出发,根据大维度生长基元的结构特性,讨论了人工可控氢氧化镁晶须生长,主要介绍了多元醇法及镁盐过饱和度法。多元醇法的实质是醇中的羟基在一定条件下与大维度生长基元中的羟基发生假联结(即吸附),使得与多元醇发生了假联结的晶面生长速率大大减小或甚至停止生长,而其他晶面仍然保持原有的速率生长以致形成晶须。镁盐过饱和度法就是使得生长基元[Mg-Ax](x-2)-(A≠OH-)的浓度很大,且要远比[Mg-(OH)x](x-2)-组分浓度大4倍以上,以先形成碱式镁盐晶须,碱式镁盐晶须再与适当的碱液反应,即可制备得氢氧化镁晶须。In this paper,from the model of anion coordination polyhedron growth units, a according to the polarity surface structural features of the large dimensions of growth units, magnesium hydroxide whiskers were grown in an artificially controlled environment, and the methods of glycerol and magnesium supersaturation are introduced. The essence of method of polyols that is false incorporate （ ie： adsorption ） under certain conditions, it make a false incorporate of crystal face with polyols growth rate significantly reduce or even stop growing, while the other crystal faces remain the original rate of growth, it can be achieved manually controlled growth of magnesium hydroxide whisker. Method of supersaturation of magnesium solution is what makes the concentration of growth units [ Mg-Ax] （x-2）-（ A ≠OH- ） great, and to be more than 4 times larger than the concentration of component [ Mg-（ OH）x ] （x-2）- ,So to formation of basic magnesium whisker firstly, and then let it react with the appropriate alkali solution to prepare magnesium hydroxide whiskers.

关 键 词：负离子配位多面体生长基元模型 人工可控生长 生长形态 氢氧化镁晶须 

分 类 号：P575[天文地球—矿物学]