Title :
Thermal aging effects on electrical and physicochemical properties of mineral base insulating liquids
Author :
Abe, K. ; Umemura, T. ; Shimahara, M.
Author_Institution :
Toshiba Corp., Mie, Japan
Abstract :
The variation of electric and physicochemical properties of a mineral base insulating liquid due to thermal aging has been studied. The liquid consisted of various kinds of C16 to C20 hydrocarbons. The C18 constituents seem to selectively decompose during aging. Thermal aging was found to give a shift of the molecular-weight-distribution curve, resulting in an increased average molecular weight. A conductivity increase due to the increase in ionic concentration in the liquid was observed. The decrease of carrier mobility is attributed to an increase of carrier size
Keywords :
ageing; dissociation; electrical conductivity of liquids; insulating oils; ion mobility; molecular weight; organic compounds; carrier mobility; conductivity increase; decomposition; electrical properties; hydrocarbons; ionic concentration; mineral base insulating liquids; molecular-weight-distribution curve; oils; physicochemical properties; thermal aging; Aging; Chemicals; Dielectric liquids; Dielectric loss measurement; Dielectrics and electrical insulation; Minerals; Oil insulation; Petroleum; Thermal conductivity; Viscosity;
Conference_Titel :
Electrical Insulation, 1988., Conference Record of the 1988 IEEE International Symposium on
Conference_Location :
Cambridge, MA
DOI :
10.1109/ELINSL.1988.13905
