
Sintered tungsten bar may be produced by indirect-heated way to sinter under uniform temperature conditions using medium-frequency induction sintering furnace as an important piece of producing equipment. Compared with vertical sintering method, the quality of tungsten bar prepared by indirect sintering method is improved with excellent energy-saving effect. And this type of tungsten bar can be used for the preparation of tungsten wire. Medium-frequency induction sintering furnace adopts tungsten tube as heating element, and zirconium oxide as insulation material. The…