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Effect of powder compact density on the LIBS analysis of Ni impurities in alumina powders
The quantification of elemental impurities in aluminum oxide powder is important due to its large demand for various industrial applications. One of the techniques to perform such analysis is Laser-Induced Breakdown Spectroscopy (LIBS) and to that end, powders are usually pressed into pellets. Howev...
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Published in: | Spectrochimica acta. Part B: Atomic spectroscopy 2018-10, Vol.148, p.99-104 |
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Main Authors: | , , , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
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Summary: | The quantification of elemental impurities in aluminum oxide powder is important due to its large demand for various industrial applications. One of the techniques to perform such analysis is Laser-Induced Breakdown Spectroscopy (LIBS) and to that end, powders are usually pressed into pellets. However, the density of the powder-compact is often not reported and its effect on the analytical figure-of-merit is unknown. In this work, we study the influence of aluminum oxide powder-compacts density of these pellets on the calibration curve of nickel contaminant. Our results show that the sensitivity increases whenthe grain size increases for a given density and that its relative standard deviation decreases with the density of the powder compacts without any grain size effect. These results imply that both the powder-compact density and the ultimate particle size of the powders must be specified in the protocol for building the calibration curve.
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•Effect of compaction on LIBS sensitivity for alumina powder pellets•Effect of grain size on LIBS sensitivity for alumina powder pellets•Correlation between size, compaction and laser sampling of the pressed powder |
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ISSN: | 0584-8547 1873-3565 |
DOI: | 10.1016/j.sab.2018.06.005 |