PROCEDEU PENTRU OBTINEREA UNUI STRAT IZOLANT CARE DA RADIATII INVIZIBILE,PENTRU CATOZI INCALZITI INDIRECT DE CORPURI DE INCALZIRE

摘要

Heater for indirectly heated cathodes with a homogeneous dark colored insulating layer which is formed by introducing aluminum oxide, tungsten oxide and chromium oxide, all in powder form, into a coating bath and coating the heaters in a combined electrophoretic-electrolytic process by dipping them into the bath only once.