Classification of aging level of solid dielectric using Fourier transform infrared spectroscopy — Method of discriminant analysis

摘要

The main objective of this paper is to investigate the possibility of application of Fourier transform infrared spectroscopy and method of discriminant analysis for classification of a solid dielectric. Classification method was determined by applying accelerated thermal aging on glass-mica-based insulating system material. Based on previous experience and on the thermal class of the insulating system, the aging temperature was set to 170 °C. Infrared spectra were measured after 192, 384, and 600 hours of aging using technique of Attenuated Total Reflectance in the middle area of the infrared electromagnetic spectrum (4000–600 cm−1). Regarding the results, it is possible to state that the method of discriminant analysis in connection with Fourier transform infrared spectroscopy can be regarded as a proper diagnostic indicator of aging for material of insulating systems.