... ℃, so the tungsten crucible is widely used in sapphire crystal growth furnace, quartz glass melting furnace, rare earth smelting ... environment in general more than 2000 ℃. Especially for sapphire crystal growth furnace, high purity, high density, no inner crack ... rate of sapphire crystal growth process of crystal, crystal pulling quality control, to take off the crystal glue pot life and played ...