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High temperature, corrosion resistant metal crucibles

Specialist applications often require specialist crucibles. At high temperatures corrosion can often become a factor which needs to be considered, along with thermal expansion of the material being melted. In some cases the material being melted will not be compatible with the more typical standard crucibles such as ceramic or quartz. This is where specialist metal crucibles can become invaluable.

Which metals are these specialist crucibles available in?

Goodfellow offer metal crucibles in the following materials:

  • Molybdenum
  • Nickel
  • Inconel® 601
  • Tantalum
  • Zirconium

What are the key properties of these materials?

Molybdenum

Excellent strength at high temperatures.

High melting point (2610°C).

Corrosion resistance to many acids, molten metals, alloys and glasses.

Begins to oxidise in air at 400°C.
Approximate maximum operating temperature 1500°C.

Nickel

Completely resistant to phosphoric acid.

Highly resistant to strong alkalis.

Not suitable for use with oxidising salt solutions.

Approximate maximum operating temperature 1200°C.

Inconel® 601

Excellent resistance to oxidation up to 1200°C.

Good thermal shock properties.

Good resistance to nitric acid & low concentrations of phosphoric acid.

Not resistant to sulphuric, hydrochloric and hydrofluoric acids.

Tantalum

One of the most corrosion resistant materials available.

Highly resistant to many acids and molten metals.

Begins to oxidise significantly in air above 300°C.

Approximate maximum operating temperature 1500°C.

Zirconium

Resistant to reducing acids and strong alkalis.

Particularly suitable for fusions using sodium carbonate or sodium peroxide.

Excellent low cost replacement for platinum.
Usable in air up to 450-500°C.

What sizes and shapes are these crucibles available in?

Molybdenum

Shapes: Straight wall
Capacities: 20ml to 100ml

Lids/covers and custom made sizes & shapes also available.

Nickel

Shapes: Straight wall, low form and high form

Capacities: 5ml to 1500ml
Lids/covers and custom made sizes & shapes also available.

Inconel® 601

Shapes: Straight wall

Capacities: 5ml to 1500ml
Lids/covers and custom made sizes & shapes also available.

Tantalum

Shapes: Straight wall & Low form

Capacities: 5ml to 1000ml
Lids/covers and custom made sizes & shapes also available.

Zirconium

Shapes: Straight wall & low form

Capacities: 5ml to 1500ml
Lids/covers and custom made sizes & shapes also available.

 

For more information and advice please discuss your application with our sales staff.