Measuring the Changes in Copper Nanopowder Conductivity during Heating as a Method for Diagnosing its Thermal Stability

Abstract:

This work researches the impact of the temperature of compacted copper nanopowder on the amperage of the current flowing through the nanopowder sample. It was determined that upon reaching its oxidation temperature (~ 1900C), the copper nanopowder started conducting electricity, and at 280-320°C electric breakdown of sample was occurring. This is caused to irreversible processes taking place in nanomaterials during heating, such as sintering and mass-transfer, those processes leading to the formation of conductivity channels. This speaks in favor of an evident dependency between copper nanopowder conductivity and the chemical transformations taking place in it; this allows for recommending this research method for instant diagnostics of copper nanopowders.

• Periodical: Key Engineering Materials (Volume 769)
• Pages: 146-151
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.769.146
• Online since: April 2018
• Authors: Andrei V. Mostovshchikov*, Alexander P. Ilyin, Irina K. Zabrodina, Liudmila O. Root, Daniar V. Ismailov
• Keywords: Copper Nanopowder, Diagnostic Methods, Electric Conductivity, Oxidation, Thermal Stability

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