硼酸镁纳米晶须的水热-熔盐焙烧合成研究  

Synthesis of Magnesium Borate Nanowhiskers via Hydrothermal-Molten Salt Calcination Method

作　　者：方晓杰[1] 陈建铭[1] 宋云华[1] 

机构地区：[1]北京化工大学化学工程学院,北京100029

出　　处：《人工晶体学报》2012年第4期973-976,共4页Journal of Synthetic Crystals

摘　　要：以MgCl2·6H2O、H3BO3和NaOH为原料,采用定-转子反应器合成MgBO2(OH)前驱体,水热合成MgBO2(OH)纳米棒,进而熔盐焙烧合成了直径为50～105 nm、长度为6～13μm(平均长径比为120)、高度分散的纯单斜相单晶Mg2B2O5纳米晶须。采用XRD、SEM、EDX、TEM及SAED等手段进行表征。研究发现,MgBO2(OH)纳米棒的最佳合成条件是水热温度为210℃、水热时间为8 h,该条件下可获得分散良好、形貌规则,尺寸分布范围窄的MgBO2(OH)纳米棒。MgBO2（OH） nanorods have been synthesized using MgCl2 · 6H2O, H3BO3 and NaOH as materials. The process involved precursor slurry of MgBO2 （OH） preparation by rotor-stator reactor and subsequent hydrothermal method. Then pure single crystalline monoelinic Mg2B2O5 nanowhiskers with high dispersity were synthesized by sintering above MgBO2 （OH） nanorods. The size results of Mg2B2O5 nanowhiskers are as follows： diameters are in the range of 50-105 nm, lengths are in the range of 6-13μm and average aspect ratio is 120. The samples were characterized by XRD, SEM, EDX, TEM and SAED. Results show that the optimal hydrothermal temperature and hydrothermal time for MgBO2 （OH） nanorods are 210 ℃ and 8 h respectively, here MgBO2 （OH） nanorods with good dispersity, regular morphology and narrow size distribution could be synthesized.

关 键 词：硼酸镁 纳米晶须 水热-熔盐焙烧 定-转子反应器 

分 类 号：O784[理学—晶体学]