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  « Effect of powder compact density in alumina powder »
April 24th, 2024, 5:40pm
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   Author  Topic: Effect of powder compact density in alumina powder  
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Effect of powder compact density in alumina powder
« on: January 6th, 2021, 10:18am »

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Effect of powder compact density on the LIBS analysis of Ni impurities in alumina powdershslabrasive
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.
Highlightsfused alumina abrasive

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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