Crogiolo senza cuciture di niobio

Detailed information

Niobium is a gray white metal, melting point 2468 ℃, boiling point 4742 ℃, density 8.57 g / cm3. Niobium is stable in air at room temperature, and it is not completely oxidized at red heat in oxygen. Niobium is directly combined with sulfur, nitrogen and carbon at high temperature and can form alloy with titanium, zirconium, hafnium and tungsten. It is insoluble in aqua regia, but soluble in hydrofluoric acid. Brand: ro4200-1, ro4210-2 Purity: ≥ 99.95% Types: Machining crucible, welding crucible, riveting crucible, stamping crucible

 

Usage: niobium is used as crucible container. Because of its high temperature resistance, strong deformation resistance and corrosion resistance, it is generally used in rare earth metal smelting, induction furnace heating body, special glass melting, material tray of electrolytic capacitor anode during high temperature sintering, chemical corrosion resistance container, splash and evaporation container, etc

Item name	Bright chemical clean 99.95 % High quality niobium crucible
pure tungsten	Nb Purity: 99.95%
Dimension &  Cubage	According to your needs or drawings
Delivery time	10-15 days
Application	1.smelting of rare earth metals                                                                         2.heating elements of induction furnace                                                         3. solar energy and sapphire.
Technique (Type)	Sintering,stamping, spinning.
Working temperature	1800 - 2000 DC
Delivery time	10-15days
Special sizes can be manufactured based on customers' requirements.

Supply Situation	Dimensions		Tolerance
	Diameter(mm)	Height(mm)	Diameter(mm)	Height(mm)
Sintering	10-500	10-750	±5	±5
Forging	10-100	10-120	±1	±2
Sintering and Machining	100-550	10-700	±0.5	±1

Grade                               Element	RO4210-2	RO4261-4
	Industrial grade non-alloy niobium	(Industrial grade niobium alloy with 1% zirconium)
Max,wt %(Unless otherwise specified)
Each ingot:
C	0.01	0.01
N	0.01	0.01
O	0.025	0.025
H	0.0015	0.0015
Zr	0.02	0.8~1.2
Ta	0.2	0.5
Fe	0.01	0.01
Si	0.005	0.005
W	0.05	0.05
Ni	0.005	0.005
Mo	0.01	0.05
Hf	0.02	0.02
When the rules:
B	/	/
Al	0.005	0.005
Be	/	/
Cr	/	/

Feature

1. Low thermal expansion; 

2. High density;

3. Good corrosion resistance

4. High strength;

5. Low resistivity;

6.The surface roughness of tooled crucibles does not exceed Rz 6.3;

7.The use temperature below 2450ºC in vacuum or deoxidize atmosphere.

8.Manufactured based on customers' requirements

 

Application

 1. Used for sapphire single crystal growth furnace;

 2. Applied for quartz glass melting furnace;

 3. Used for rare earth smelting furnace;

 4. Used for sintering metal mold of high melting point;

 5. Widely used in other following industries:

 Ceramics and metallurgical industries, machinery processing and light dustries.