Cold conductor material used for electronic switches consists of a finely dispersed titanate powder and a structure made up of a core of lead titanate and a shell of barium titanate, calcium titanate or strontium titanate

摘要

Cold conductor material consists of a finely dispersed titanate powder having an average grain size of not more than 0.7 mu m at a sintering temperature of less than 1050 deg C and a structure made up of a core of lead titanate and a shell of one or more of barium titanate, calcium titanate or strontium titanate. Before or during fine grinding in an aqueous medium, 0.5-20 wt.% boron nitride, barium borate or a glassy mixture of the oxide system PbO.B2O3.SiO2 is added. Preferred Features: The material has an electric strength above 150 V/mm at specific electrical cold resistances of below 500 OMICRON .cm and reference temperatures of 120-400, preferably 200-400 deg C.