Preparation and characterization of LaB_6 ultra fine powder by combustion synthesis  

燃烧合成法制备LaB_6超细粉末及表征(英文)

作　　者：豆志河[1] 张廷安[1] 张志琦[1] 张含博[1] 赫冀成[1] 

机构地区：[1]东北大学多金属共生矿生态化利用教育部重点实验室,沈阳110004

出　　处：《Transactions of Nonferrous Metals Society of China》2011年第8期1790-1794,共5页中国有色金属学报（英文版）

基　　金：Projects (51002025,50644016,5087402) supported by the National Natural Science Foundation of China

摘　　要：High-purity,homogeneous and ultra fine LaB6 powders were prepared by combustion synthesis.The effects of reactant ratio and molding pressure on the phase and morphology of the combustion products were studied.The combustion products and leached products were analyzed by XRD,SEM and EDS.The results indicate that the combustion product consists of LaB6,MgO and a little Mg3B2O6.The combustion product becomes denser and harder when the molding pressure increases.The purity of LaB6 is higher than 99.0%.The LaB6 particle size is in range of 1.92-3.00 μm and the lattice constant of LaB6 is a=0.414 8 nm.采用燃烧合成法制备高纯超细LaB6粉末。考察反应物配比和制样压力等条件对燃烧产物相组成和微观结构的影响,利用XRD、SEM和EDS等技术对燃烧产物和浸出产物进行表征。结果表明,燃烧产物由LaB6,MgO和少量Mg3B2O6组成。随着制样压力的增加,燃烧产物变得致密坚硬。LaB6的纯度高于99.0%,其粒度为1.92?3.0μm,晶格常数a=0.4148nm。

关 键 词：combustion synthesis lanthanum hexaboride Mg3B2O6 

分 类 号：TB44[一般工业技术]