Characterization of nanometer tungsten powders
来源期刊：Rare Metals2008年第2期
论文作者：LI Huiqian LIN Tao SHAO Huiping WU Chengyi GUO Zhimeng LUO Ji School of Materials Science and Engineering,University of Science and Technology Beijing,Beijing ,China
文章页码：197 - 200
摘 要：<正>Three types of tungsten powders were prepared by hydrogen reduction of three precursor powders at low temperature,which were used as samples,and were then characterized by Brunauer-Emmer-Teller （BET） method,scanning electron microscopy （SEM）,transmission elec- tronic microscopy （TEM）,small angle X-ray scattering （SAXS）,and field-emission scanning electron microscopy （FESEM） respectively. The results showed that although BET and SEM could not characterize the particle size of nanometer powders,they were important means of assistance to exclude non-nanometer powders.TEM and FESEM could directly measure the particle size of nanometer powders,but this needs a lot of time,to count tlae average particle size and particle size distribution.SAXS could not describe the state of agglomeration.By the combination of FESEM and SAXS,the particle size,particle size distribution,and particle shape of nanometer powders could be pre- cisely characterized.
LI Huiqian LIN Tao SHAO Huiping WU Chengyi GUO Zhimeng LUO Ji School of Materials Science and Engineering,University of Science and Technology Beijing,Beijing 100083,China
摘 要：<正>Three types of tungsten powders were prepared by hydrogen reduction of three precursor powders at low temperature,which were used as samples,and were then characterized by Brunauer-Emmer-Teller （BET） method,scanning electron microscopy （SEM）,transmission elec- tronic microscopy （TEM）,small angle X-ray scattering （SAXS）,and field-emission scanning electron microscopy （FESEM） respectively. The results showed that although BET and SEM could not characterize the particle size of nanometer powders,they were important means of assistance to exclude non-nanometer powders.TEM and FESEM could directly measure the particle size of nanometer powders,but this needs a lot of time,to count tlae average particle size and particle size distribution.SAXS could not describe the state of agglomeration.By the combination of FESEM and SAXS,the particle size,particle size distribution,and particle shape of nanometer powders could be pre- cisely characterized.
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