Synthesis of Mg_2B_2O_5 whiskers via coprecipitation and sintering process

作     者：Dong-hai Zhu Xue-ying Nai Cheng-cai Zhu Feng-qin Guo Shao-ju Bian Wu Li 

作者机构：Qinghai Institute of Salt Lakes Chinese Academy of Sciences Xining 810008 China Graduate University of Chinese Academy of Sciences Beijing 100049 China Department o f Basin Education Qinghai University Xining 810016 China 

出 版 物：《International Journal of Minerals,Metallurgy and Materials》 (矿物冶金与材料学报（英文版）)

年 卷 期：2012年第19卷第10期

页      面：969-972页

核心收录：

学科分类：080503[工学-材料加工工程] 08[工学] 080401[工学-精密仪器及机械] 0804[工学-仪器科学与技术] 0805[工学-材料科学与工程（可授工学、理学学位）] 0803[工学-光学工程] 

基　　金：financially supported by the Department of Science and Technology of Qinghai Province of China(Grant No.2010-G-208) 

主　　题：magnesium borate coprecipitation sintering crystal whiskers crystal growth microstructure 

摘      要：Mg2B2O5 whiskers with high aspect ratio were synthesized by coprecipitation and sintering process using MgCl2-6H2O, H3BO3, and NaOH as raw materials and KCl as a flux. Their formation process was investigated by thermogravimetry and differential scanning calo- rimetry （TG-DSC）, X-ray diffraction （XRD）, and scanning electron microcopy （SEM）. It is found that the products synthesized at 832℃ are monoclinic Mg2B205 whiskers with a diameter of 200-400 nm and a length of 50-80 μm. Transmission electron microscopy （TEM） and selected area electron diffraction （SAED） analyses show that the whiskers obtained at 832℃ are single crystalline and grow along with the [010] direction. The growth mechanism of Mg2B2O5 whiskers was also presented.