Study on molecular behavior in oxidation of insulating oil using terahertz spectroscopy

Nobuaki Nishimura, Ryuichi Ogura, Satoshi Matsumoto, Maya Mizuno, Kaori Fukunaga

Research output: Contribution to journalArticle

1 Citation (Scopus)


The number of aged power equipment increases and it is important to clarify the characteristics of deteriorated insulating oil. This paper describes the basic study on molecular behavior in oxidation process of insulating oil by terahertz spectroscopy. The oxidation process of insulating oil was modeled by using various compositions of dodecane and 2-octanol. From the terahertz measurements, the absorption related to hydroxyl groups (-OH) was significantly observed between 6 and 7 THz. The absorption band was also observed in accelerated aging alkylbenzene used in power equipments as insulating oil, and sensitive to hydrogen bonds.

Original languageEnglish
Pages (from-to)943-948
Number of pages6
JournalIEEJ Transactions on Fundamentals and Materials
Issue number11
Publication statusPublished - 2011



  • Absorption characteristics
  • Hydrogen bond
  • Insulating oil
  • Molecular behavior
  • Oxidation
  • Terahertz

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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