Non-linear voltage-dependent resistor used in switching circuits contains silicon carbide particles doped with aluminum or boron

摘要

Non-linear voltage-dependent resistor contains silicon carbide particles doped with aluminum or boron. Independent claims are also included for: (a) a process for the production of the resistor comprising mixing the silicon carbide particles with aluminum or boron, and heat treating in an oxidizing atmosphere to form a metal oxide crystal phase and a silicon dioxide crystal phase; and (b) a varistor (1) comprising the above resistor (2) and varistor connections (3, 4). Preferred Features: The surfaces of the doped silicon carbide particles are oxidized.