主管：中华人民共和国司法部
主办：司法鉴定科学研究院
ISSN 1671-2072  CN 31-1863/N
中国司法鉴定

中国司法鉴定 ›› 2013 ›› Issue (4): 23-27.

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铜导线一次和二次短路熔痕的 显微共聚焦激光拉曼光谱特征研究

丁敏菊1，王 莹1，张成功1等   

  1. 1.上海市公安局物证鉴定中心 上海市现场物证重点实验室 省部共建国家重点实验室基地，上海200083； 2.公安部上海消防研究所，上海200438；3. 中科院硅酸盐研究所，上海 200050；4. 上海市消防局，上海 200050
  • 收稿日期:2013-05-29 出版日期:2013-07-15 发布日期:2022-07-11
  • 作者简介:丁敏菊(1960-)，女，高级工程师，主要从事理化微量物证鉴定。
  • 基金资助:
    上海市社会发展科技资助项目(231201300)

Study on the Primary and Secondary Copper Molten Marks by Laser Raman Micro-spectroscopy

DING Min-ju1, WANG Ying1, ZHANG Cheng-gong1, etc.   

  1. 1. Shanghai key Laboratory of Crime Scene Evidence, State Key Laboratory Breeding Base of Crime Scene Evidence, Institute of Forensic Science, Shanghai Municipal Public Security Bureau, Shanghai 200083, China; 2. Shanghai Fire Research Institute, Ministry of Public Security, Shanghai 200438, China; 3. Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China; 4. Shanghai City Fire Bureau, Shanghai 200050, China
  • Received:2013-05-29 Published:2013-07-15 Online:2022-07-11

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摘要：

目的 为了判定火灾发生的原因，依据激光拉曼光谱（RMS）能够反映出经过不同高温热处理炭材料的石墨化程度，以此来探索电气短路判定的技术依据。方法 利用显微共聚焦激光拉曼光谱仪对火灾中不同环境下生成的铜导线短路熔痕表面碳痕斑进行检测分析，利用碳痕斑两个拉曼特征位移峰的比值，计算不同短路熔痕表面碳化斑的石墨化度。结果 铜导线的一次短路、二次短路和火烧熔痕上残留碳斑石墨化度不同，一次短路熔珠碳痕的石墨化度R值最小，火烧熔痕的石墨化度R值最大。结论 该研究建立了显微激光拉曼光谱法无损检测分析铜导线短路熔痕的新方法。

关键词: 铜导线, 熔痕, 激光拉曼光谱, 碳残留物

Abstract:

Objective In order to determine the cause of fire, laser Raman spectroscopy (RMS) is applied to characterize the crystal structure of the carbon during graphitization to explore the technical basis of electrical short circuit. Method The carbonized residues on copper molten marks caused by fire were examined with RMS. With the ratio(R) of two Raman characteristics peaks of carbon marks, the graphitization degrees of carbonization spot on the melten trace surfaces in different short circuits were calculated. Results It was found that the amorphous carbon content is different between electric and fire molten marks. The primary molten mark shows the lowest R value, while the secondary molten mark and fire molten mark shows higher one. Conclusion Based on the result, a method for discriminating molten marks is established, which can provide pivotal evidence for fire investigation.

Key words: copper wire, molten mark, laser Raman micro-spectroscopy, carbon residue

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