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《Journal of Northeastern University(Natural Science)》 2005-01
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Preparation of LaB_6 Micropowder by Self-Propagating High-Temperature Synthesis and Characterization

ZHANG Ting-an, DOU Zhi-he, YANG Huan(School of Materials & Metallurgy, Northeastern University, Shenyang 110004, China. )  
LaB_6 micropowder was prepared by self-propagating high-temperature synthesis(SHS). SHS process in which the thermally explosible and leachable products were checked by XRD, then a two-step leaching procedure was therefore confirmed. The LaB_6 prepared was analyzed and characterized by TEM, spectral analysis, SEM and granularity analyzer. The results indicated that the thermally explosible products consist of LaB_6, MgO and bits of Mg_3B_2O_6 and LaOCl, and that the single pure phase LaB_6 can be obtained using HCl then H_2SO_4 in an interlacing way in leaching process. The crystal lattice constant of LaB_6 was calculated as a=0.4148nm, with its purity lower than 99% and the mean grain size is 1.92μm.
【Fund】: 国家自然科学基金资助项目(50374026);; 辽宁省重点学科带头人培养计划项目(辽教办200117124206)
【CateGory Index】: TB383
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