矿化剂对水热法改性氢氧化镁晶体的影响  

Effect of Mineralizer on Mg(OH)_2 Crystal Prepared by Hydrothermal Method

作　　者：蔺力[1] 陈建铭[1] 宋云华[1] 

机构地区：[1]教育部超重力工程研究中心,北京化工大学,北京100029

出　　处：《无机化学学报》2008年第4期665-669,共5页Chinese Journal of Inorganic Chemistry

基　　金：国家863计划(No2002AA302605)资助项目

摘　　要：近几年来,氢氧化镁作为一种无机阻燃剂由于其具有制备条件相对温和,生产工艺简单且产品与自然环境友好等特点,在研究及生产活动方面备受关注且得到了长足的发展。目前采用氢氧化钠法进行反应-水热制备高分散阻燃级氢氧化镁的工艺路线已经比较成熟。然而，不利的是，氢氧化钠偏高的价格导致了产品的制造成本较高。而采用石灰法制备氢氧化镁阻燃剂具有价格低廉的特点，引起了人们的关注。Dispersive flame retardant type Mg（OH）2 were prepared via the addition of mineralizer into the precursor of Mg（OH）2-xClx obtained with solutions of Ca（OH）2 and MgCl2 in rotor-stator reactor （RSR）. Mg（OH）2 crystals were characterized by XRD, SEM, TG. The results show that different mineralizers have different levels of effects on the hydrothermal growth of Mg（OH）2 crystals. Comparing with others, when KOH is used as mineralizer, it is prone to strengthen the growth direction of Mg（OH）2 crystal face. When the concentration of KOH are increased, the microstrain could be decreased, the crystal structure becomes more stable, plate thickness of Mg （OH）2 crystals is increased, and highly dispersed flame retardant type Mg（OH）2could be prepared accordingly.

关 键 词：氢氧化镁 矿化剂 水热改性 晶体 

分 类 号：O614.22[理学—无机化学]