Coils & Filaments
The AL2O3 coated evaporation basket was first introduced by CM in 1957. Since that time these evaporator baskets have proven to be vital to the vacuum metallizing industry. The parts consist of either tungsten or molybdenum wire formed into baskets and set at 1550° C in hydrogen atmosphere. These are then coated with pure AL2O3 which is sintered in H2 to form the crucible configuration with an internal heater. Because of the intimate internal contact between the heater wire and the crucible structure and the resulting outstanding heat transfer characteristics, vaporization of the material to be deposited may be achieved at lower heater temperatures, resulting in longer evaporator life.