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TEM Specimen Preparation Method of Gibbsite Powder for Quantitative Structure Analysis  

Kim, Young-Min (Division of Analysis & Measurement, Korea Basic Science Institute)
Jeung, Jong-Man (Division of Analysis & Measurement, Korea Basic Science Institute)
Lee, Su-Jeong (Dept. of Earth System Sciences, Yonsei University)
Kim, Youn-Joong (Division of Analysis & Measurement, Korea Basic Science Institute)
Publication Information
Applied Microscopy / v.32, no.4, 2002 , pp. 311-317 More about this Journal
Abstract
There is great requirement on the TEM specimen preparation method with particle size selectivity as a prerequisite for the quantitative structure analysis on the materials such as gibbsite powder, which generally forms a large agglomerate and shows a variation of transition process depending on their sizes. In this experiment, we made an attempt to give a methodology for the TEM specimen preparation of powder with the size selectivity. After mixing 1 wt% gibbsite powder with ethanol solvent, gibbsite suspension was prepared by application of ball-milling and ultrasonification with addition of 0.25 vol% dispersion agent, Darvan C, which was diluted into distilled water by the ratio 1:19. Appling the static sedimentation method to gibbsite suspension after estimation of the sedimentation time by the measurement of accumulative concentration variation, we acquired TEM specimens with well-dispersed and size selected gibbsite particles in nm scale. Overall picture of each sample was taken by SEM and morphology of each dispersed particle was imaged by TEM. Raw and processed gibbsite powders were also examined by XRD to investigate whether they were suffered from phase change during the process or not.
Keywords
Gibbsite powder; Particle size selectivity; Sedimentation method; TEM specimen preparation method;
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Times Cited By KSCI : 2  (Citation Analysis)
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