白云石锻粉制备碱式氯化镁纳米线的研究(英文)  

Preparation of Magnesium Hydroxide Chloride Hydrate Nanowires Using Calcined Dolomite

作　　者：陈雪刚[1] 吕双双 李秀悌[1] 张路[1] 张平萍[3] 叶瑛[1] 

机构地区：[1]浙江大学海洋科学与工程学系,杭州310028 [2]浙江省地质矿产研究所非金属研究室,杭州310007 [3]国家海洋局第二研究所,杭州310012

出　　处：《无机材料学报》2011年第2期214-218,共5页Journal of Inorganic Materials

基　　金：Natural Science Fund of Ningbo,Zhejiang Province(2008B10036);Fundamental Research Funds for the Central Universities

摘　　要：碱式氯化镁（MHCH）纳米线是一种重要的高分子填充剂及一维纳米结构的前驱体.本文以白云岩锻粉为原料,利用水热反应制备了MHCH纳米线.通过XRD、SEM和FT-IR表征表明所制备的MHCH是完好结晶的Mg10（OH）18Cl2.5H2O纳米线,其直径和长度分别为50~120 nm和数十微米.TG-DTA测试表明,MHCH的热分解分为两步,在加热过程中MHCH始终处于吸热状态.白云石锻粉中的MgO和CaO与氯化镁的摩尔比R对MHCH的结构和形貌具有重要的影响：MHCH的长径比随R的增大而减小,而当R大于0.5时,体系中将出现Mg（OH）2;制备MHCH的最佳摩尔比R在0.025和0.075之间.由于MHCH用途广泛,本研究将拓宽白云石的潜在应用价值.Magnesium hydroxide chloride hydrate（MHCH） nanowires are important polymer fillers and precursors for one-dimensional nanostructures.Here a novel method was presented to prepare MHCH nanowires using calcined dolomite as raw materials via a hydrothermal approach.XRD,SEM,and FT-IR analyses indicate that the as-prepared MHCH is well crystallized Mg10（OH）18Cl2.5H2O nanowires with diameters of 50-120 nm and length of several tens micrometers.The TG-DTA patterns of MHCH consisted of two steps and MHCH is at endothermic status during the whole heating process.The molar ratio of（MgO＋CaO） in calcined dolomite to MgCl2（R） plays a key role to the structure and morphology of MHCH.The aspect ratio of MHCH nanowires decreases with the increasing of R and Mg（OH）2 will be formed when R was greater than 0.5.The optimum R to prepare MHCH is between 0.025 and 0.075.This study will extend the potential applications of dolomite due to the extensive applications of MHCH.

关 键 词：白云石锻粉 碱式氯化镁(MHCH) 纳米线 氯化镁 水热 

分 类 号：TB321[一般工业技术—材料科学与工程]