In the realm of induction melting, the differences between quartz crucibles and graphite crucibles primarily involve the heating methods and melting capacities.

Main Differences

• Appearance:

Quartz crucibles appear as white cups, whereas graphite crucibles come in black.

• Heating Method:

The quartz crucible does not conduct electricity and thus does not self-heat when exposed to intermediate frequency currents. Only the metal being melted is heated.

Conversely, the graphite crucible is conductive and heats itself when high-frequency currents pass through. Metals are heated through induction heating.

This makes graphite crucibles suitable for heating non-metallic materials as well.

• Heating Capacity:

Quartz crucibles can withstand higher temperatures compared to graphite crucibles. Intermediate frequency melting furnaces with quartz crucibles can reach up to 2600°C, while high-frequency melting furnaces with graphite crucibles peak at 1600°C.

• Melting Range:

Quartz crucibles are ideal for melting iron, aluminum, stainless steel, platinum, gold, palladium, and similar metals.

Graphite crucibles are suitable for melting copper, brass, gold, silver, zinc, lead, and other non-ferrous metals as well as their alloys.

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For additional information, visit: Graphite Electrode Market Size, Outlook, Trends and...

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