BTM group can supply all kinds of tungsten crucibles and the whole set of tungsten rods, plates, heat insulation screens and other parts which are used in hot zone of sapphire grower according to customer’s drawing and specific requirements.
Due to the manufacturing advantages of tungsten rods, tungsten sheets, tungsten machining parts and tungsten processing equipment, BTM Group established a Division of hot zone of sapphire crystal growing since 2008. Until now BTM Group provided a large number of hot zone parts like crucibles, sheet and rods to Russia, Ukraine, USA, Japan, Korea, Thailand, Singapore Taiwan and Hong Kong. So now we have been gradually formed the capacity of 30 sets hot zone in 35Kg, 65Kg, 85Kg and 120Kg.
BTM Group has a sound quality management system of ISO9001 and ISO14001 and get the certification.
BTM Group has a excellent testing equipment of physical properties like density, hardness, surface roughness, grain size, tensile strength and other parameters, even ultrasonic NDT.
The distinguishing characteristic of BTM Group’s tungsten crucible is high density, high purity and high precision machining. As the whole set of hot zone parts is completed in BTM Group, so the quality between the components is to get a good guarantee. With its excellent quality and reasonable price has been widely recognized by the industry of sapphire crystal growing and hot zone furnace at home and abroad, BTM Group has been designated the sole supplier and leader in domestic and foreign industry.
Because of their excellent corrosion resistance again sapphire melt and their high temperature creep resistance, tungsten crucibles are used for sapphire crystal growing in all common processes.
The sizes of tungsten crucibles:
| Material | Density | Size |
| Tungsten (99.95%) | ≥18.3g/cc (sintered) |
Wall thickness: 0.02mm-50mm Diameter:70-800mm Height: 50-700mm |
| Molybdenum (99.95%) | ≥9.8g/cc (sintered) |
Wall thickness: 0.02mm-50mm Diameter:70-550mm Height: 50-700mm |
| NOTE: Under vacuum or reducing atmosphere, the maximum operating temperature of tungsten crucibles is 2450℃, but 1700℃ for molybdenum crucible. | ||
Speciation: External diameter: φ4---φ10mm
Wall thickness: 1.0---1.5mm
Length: ≤750mm
Applications: the thermocouple protecting tube to test the temperature. making guns, rocket nozzles
Wall thickness: 1.0---1.5mm
Length: ≤750mm
Applications: the thermocouple protecting tube to test the temperature. making guns, rocket nozzles
If you are interested in the tungsten tube please contact sales for inquiries.