Tungsten crucible is made of metal tungsten. Tungsten has the characteristics of high melting point, high strength and hardness, good performance at high temperature, low resistivity, small expansion coefficient, and small electronic work function; therefore it is an important part of sapphire crystal growth furnace. Tungsten crucible products of our company have been used by more than 100 sapphire crystal growth factories and quartz glass factories for many years, and won excellent reputation and feedbacks.
Areas of Application
As containers used in high temperature , tungsten crucibles are widely used in sapphire crystal growth, rare-earth smelting, and coating industries.
CISRI-AT&M has 30 years of experience in producing tungsten crucibles and can meet all your requirements.
1. General density: 17. 8 g/cm3~18. 3 g/cm3;
2. Density after special process: higher than 18. 5 g/cm3;
3. Maximum outer diameter is up to 700mm;
4. We can customize products as your per need and meet all your requirements.
Note: For all specifications, we are able to adopt machining method to meet customers' high precision requirements.
According to different dimensions and conditions of use, tungsten crucibles have different production processes. Crucibles generally have shapes such as round, square, rectangular and V-shape. Producing processes include sintering, welding, stamping, and spinning; in which sintering is used most widely.For micro or small tungsten crucibles,forged tungsten rods lathing or stamping process can be used. Tungsten welding process needs rolled tungsten plates to be hot bended and then weld it to fix. Spinning process is mainly used for producing thin-walled tungsten cr ucibles which have high technical requirements.
Began in 1958, we are the first enterprise in China engaged in research and production of tungsten materials;
We have rich experiences in production of large-size tungsten crucible products, the maximum diameter reaching up to 700mm;
We've become the main crucible supplier for the world's top five largest sapphire crystal growth enterprises;
We have sufficient and stable production capacity to support your development and needs.
CISRI-AT&M Refractory Metal Materials is established based on all personnel and assets of the Refractory Metal Alloy Research Office of the Research Institute of Iron and Steel under the Ministry of Metallurgical Industry. It's one of the earliest companies which are engaged in the research of refractory metal materials. As a business unit of CISRI-AT&M Technology which is specialized in refractory materials, sputtering, and hot isostatic pressing technology, the company is committed to becoming an internationally renowned supplier of refractory materials and material solution provider for target markets by the inheritance of the experiences and technologies accumulated by the Research Institute of Iron and Steel during the past 50 years.
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