硼酸镁晶须的水热合成及表征  

Hydrothermal synthesis and characterization of magnesium borate whiskers

作　　者：路绍琰[1] 李先国[1] 冯丽娟[1] 高传慧[1] 刘金燕[1] 

机构地区：[1]中国海洋大学海洋化学理论与工程技术教育部重点实验室,山东青岛266100

出　　处：《无机盐工业》2010年第6期18-20,共3页Inorganic Chemicals Industry

基　　金：青岛市科技发展计划项目(06-2-2-14-jch)

摘　　要：以六水氯化镁和硼砂为原料,利用水热前躯体法在190℃水热10 h制备出长径比为30~90的碱式硼酸镁晶须,再将碱式硼酸镁晶须通过700℃高温焙烧3 h实现结构重整和物相转化,得到长径比为50-80、尺寸均一的硼酸镁晶须。利用X射线衍射（XRD）、扫描电镜（SEM）、热重分析（TG）等手段对碱式硼酸镁和硼酸镁的组成和形貌进行了表征。同时考察了反应物浓度、水热温度、水热时间及表面活性剂对前驱体形貌的影响。Precursor, magnesium borate hydroxide whiskers [ MgBO2 （ OH） ] with aspect ratio of 30 -90 were prepared at 190 ℃for 10 h by using hydrothermal method with magnesium chloride hexahydrate and boric acid as raw materials. Magnesium borate （ Mg2B2O5 ） whiskers with aspect ratio of 50 - 80 and homogeneous dimension were then obtained by calcining of the precursor at 700 ℃ for 3 h followed by structure rearrangement and phase inversion. XRD, SEM and TG etc. were used to characterize the composition and morphology of MgBO2 （ OH ） and Mg2 B2O5 . In addition, effects of reaction conditions, including reactant concentration, reaction temperature, hydrothermal time, and surfactants on morphology of precursor were investigated.

关 键 词：水热法 前躯体 碱式硼酸镁 硼酸镁 晶须 

分 类 号：TQ128.54[化学工程—无机化工]