Abstract:

This paper takes the copper wire as the research object,and XRD detection and thermal analysis were used as experimental support to analyze the formation mechanism of copper oxide. The XRD test was performed on copper wire heated  to 800 ̊C and 1 100 ̊C respectively. It was found that when thecopper powder was heated to 800 ̊C, the content of copper oxide in the heating product was as high as 91.60%, while the content of cuprous oxide was only 0.90%; When the copper powder was heated to 1 100 ̊C , the cuprous oxide content reached 65.30%,the copper oxide content was 34.70%. Through the TG curve of copper wire heated to two temperatures, combined with the principle of thermodynamics, the conversion temperature between two copper oxides was obtained and the stability of the two oxides at different temperatures was compared, which provided a reference for fire investigation and accident identification.

Key words: fire investigation, copper wire, short circuit trace;copper oxide