When it comes to choosing the right crucible for your laboratory needs, understanding the differences between graphite and clay crucibles is crucial.
5 Key Points to Consider
1. Composition
Graphite crucibles are made of 99% pure carbon. Clay crucibles are a mixture of 30-50% clay and 50-70% carbon powder.
2. Appearance
Graphite crucibles have a glossy black color. Clay crucibles have a matte grey color due to their higher porosity levels.
3. Heat Resistance
Graphite crucibles are more heat resistant than clay crucibles due to their higher carbon content. This makes them ideal for applications where extreme temperatures need to be reached or maintained.
4. Precision
Graphite crucibles can be machined down to finer tolerances with greater detail compared to clay crucibles. This is because graphite has superior properties related to thermal conductivity and electrical resistivity.
5. Pricing
Pricing for both types of crucibles can vary depending on specification requirements and country of origin. Chinese manufactured high purity graphite crucibles tend to be less expensive compared to domestically sourced or European options.
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