鈮坩堝 細節

Tungsten Crucible

1). Sintering tungsten crucible
Density: 18.0 - 18.7 g/cm3
Working temperature: 1800 - 2, 600 DC
Diameter: 100 - 600mm (max. )
Cubage: 0.5 - 100 litres
2). Forging tungsten crucible
Density: 18.5 - 19.0 g/cm3
Working temperature: 1800 - 2, 600 DC
Diameter: 18 - 120mm (max. )
Cubage: 20 - 500 ml
                                  

Product name	Wholesale high-quality high-strength high-density corrosion-resistant niobium crucibles
Density	8.53g/cm3
Purity	99.95% min niobium
Melting point	2468℃
Technique	Sintering, Stamping, Spinning
Shape	Crucible, cup,  pot, container
Dimension	According to customer's needs or drawings
Feature	High temperature resistance, high corrosion resistance
Application	Vacuum coating industry, medical industry, electronic industry

Technical specifications           

Diameter(mm)	Thickness(mm)	Height(mm)	Surface finish	inner surface finish	inner bottom finish
30-50	2-10	≤200	≤Ra2.0	≤Ra2.4	≤Ra2.8
50-100	3-15	≤300	≤Ra2.0	≤Ra2.4	≤Ra2.8
100-150	3-15	≤350	≤Ra2.0	≤Ra2.4	≤Ra2.8
150-200	5-20	≤400	≤Ra2.0	≤Ra2.4	≤Ra2.8
200-300	8-25	≤500	≤Ra2.0	≤Ra2.4	≤Ra2.8
300-400	8-30	≤600	≤Ra2.0	≤Ra2.4	≤Ra2.8
400-450	8-30	≤650	≤Ra2.0	≤Ra2.4	≤Ra2.8
450-600	8-35	≤800	≤Ra2.0	≤Ra2.4	≤Ra2.8

Specifications
1.According to different processing methods, tungsten crucibles for vacuum coating can be mainly divided into sintered molding, press molding, spinning molding, turning forming and welding forming.
2.Turning forming is mainly applied. We recommend the working temperature of the tungsten crucible for vacuum coating should be controlled below 2600℃.
3.We can produce tungsten crucible for vacuum coating according to the customer drawing.               

Features:
1. High Temperature Resistance
2. Low Pollution
3. Long Service Life
4. Easy to machine
5. Good bio compatibility
6.Good corrosion resistance

Applications: 
1. Sapphire crystal growing furnace industry
2. Vacuum coating industry
3. Sintering metal mold of high melting point
4. Rare earth smelting furnace
5. Quartz glass melting furnace
6.Widely used in other industries: machinery processing and medicine field.