INSULATION OF A COIL FOR ELECTRIC APPARATUS

摘要

An improved insulation of a coil for electric apparatus is disclosed, in which an insulated wire is wound to form a coil which is then impregnated with an impregnant comprising a suspension of an organosilicon compound and a synthetic fluoro-mica in an organic solvent, followed by curing. A fluoro-compound vaporized from the synthetic fluoro-mica in the high temperature is combined with a siloxane decomposed from the organosilicon compound thereby to provide a ceramic formation.