Almath Crucibles Ltd.

Vitreous Carbon

Laboratory and Industrial applications

Applications

Vitreous carbon is used in laboratory applications such as:

• Fusion crucibles for setting into solution.
• Boats for evaporation.
• Used as electrodes for electrochemical analysis.

Technical Specifications

Vitreous Carbon products are suitable for use in an inert atmosphere or vacuum up to 2500°C. They are also suitable for use in air up to around 600°C, however some oxidation will occur before reaching this temperature.

• Attacks by humid process: Acids and bases.
• Fusion by dry process: Sodium carbonate, Pyrosulfate, Meta and Tetraborate of lithium.
• Fusion by sodium peroxide: By addition of 5% sodium carbonate (5 to 6 fusions).
• No memory effects: Cleaning is not neccessary.

Benefits of Vitreous Carbon

Vitreous Carbon has an exceptional resistance to corrosion and to general chemical agents. Only oxygen above 600°C and oxidants attack vitreous carbon. It also has an acceptable resistance to thermal shock.

Maximum wall thickness available is 2-3mm.

Available sizes

Below is a table of available sizes. Please note that vitreous carbon crucibles are only available in the specified sizes - we cannot make special shapes/sizes in this range. For prices, please contact us.

Crucibles

Graphite Sheath

Graphite Lids

Boats (half-pipe in shape)

Capsules

Discs

Square Plates

Rods

Rods

All of the lengths to the left are available in these different shapes