Welcome JiangSu BTMMF Advanced Materials Science & Technology CO.,LTD!
JiangSu BTMMF Advanced Materials Science & Technology CO.,LTD JiangSu BTMMF Advanced Materials Science & Technology CO.,LTD
Main Products:Tungsten electrode | Sapphire crystal growth furnace thermal field | Molybdenum wire | Molybdenum and tungsten products | Welding material

Add:Yuduo Industrial Zone, Jiangyan District, Taizhou
P.C.:225509
Tel:+86-523-88644058
Fax:+86-523-88645668
E-mail:sale@
Website:www.

 

PRODUCTS
Tungsten crucibles
Tungsten crucibles

Sapphire Dan Changjing furnace crucible of tungsten: Because of the high melting point of 3410 deg.] C of tungsten, tungsten crucible is so widely used in sapphire growth furnace, quartz glass melting furnace core container, rare earth smelting furnace and other industrial furnace, the temperature of its use the environment in general in 2000 ℃ above. Especially for sapphire growth furnace, it has a high purity, high density, crack-free, precise size, smooth inner and outer walls, and other characteristics of the tungsten crucibles for sapphire crystal growth seed crystal success rate, pulling quality control, de-crystal stick pan and life has played a key role.
First, the product of physical and chemical properties:
1, purity: W≥99.95%;
2, density: ≥18.2g / cm3;
3, the maximum application temperatures: 2500 ℃.
4, the coefficient of thermal expansion (0-1600 ℃): 4.98 × 10-6
5, vapor pressure: W at 2100 ℃ about 10-6Pa.
Second, product dimensions and tolerances:

Availability
Specification
Tolerance
Wall thickness(mm)
Roughness  (μm)
Diameter(mm)
Height(mm)
Diameter(mm)
Height(mm)
Sinter
10~650
10~900
±5.0
±5.0
5~20
<3.2
Sintering finishing
10~600
10~800
±0.5
±1.0
3~18
<1.6

Third, the production process and equipment:

No.
Production Process
Production equipment
Quality check point
1
Tungsten powder (raw material)
 
1, purity tungsten powder;
2, after closing the batch of tungsten powder Fsss;
3, after closing the batch of tungsten powder compacts strength;
2
Sieved
High-frequency vibration sieve
3
Combined Batch
V-blender
4
Isostatic pressing
Isostatic press
1, roughing blank Dimensions;
2, rough billet surface quality;
5
Rough blanks vehicle processing
CNC vertical lathe
6
IF sintering
IF induction sintering furnace
1, finished dimensions, bulk density;
2, finished surface roughness and quality, testing;
3, to produce quality certificates;


Fourth, storage and recommendations
1, tungsten crucible single major and brittle, use high-intensity lifting flexible tape when lifting, slowly but surely.
2, tungsten crucible storage, in which the relative humidity shall not exceed 60%, or vulnerable to oxidation.
3, since the tungsten crucible at high temperatures sustained by force, should seek to increase the force area, and seeks to force the center line through the center of gravity of the crucible. It must be avoided between the crucible and the shim tray plus a small area, thus avoiding local small area crucible force.

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