タイトルまたは説明

Mica insulator is an entirely mineral material that basically consists of mica and glass-a binding agent that can be vitrified by fusion.these element are mixed and combined in powder form,and then heated under pressure:the particles of glass when they melt,cover the flakes of mica to form a compact and hard mass.
Mica insulators can be used for high speed train braking resistor,as ideal insulation material.