Crucible can be divided into graphite crucible, clay crucible and metal crucible three categories.In the graphite crucible, there are three kinds of ordinary graphite crucible, irregular graphite crucible and high purity graphite crucible. Due to the different of performance, usage and working conditions, so the raw materials, production methods, technology and product models and specifications are also different.
The silicon carbide crucible is a ceramic bowl with a deep bottom.en a solid is to be heated over a great fire, a crucible must be used. Because it can withstand higher temperatures than glassware.The main raw material of the ink crucible is crystalline natural graphite.Therefore, it maintains the original physical and chemical properties of natural graphite.It has good thermal conductivity and high temperature resistance. In the process of high temperature application, the thermal expansion coefficient is small, and it has certain strain resistance to heat and cold. Strong corrosion resistance to acid and alkaline solution, excellent chemical stability.
1. Different materials
Graphite crucible: graphite crucible is made of natural flake graphite as the main material.
Silicon carbide crucible: natural flake graphite, silicon carbide as the main addition of high temperature resin as binder.
2. Different process
Graphite crucible: manual customization, small crucible can be made by mechanical pressing, after molding furnace sintering 1000 degrees after adding anti-corrosion glaze or moisture-proof paint, become a complete crucible.
Silicon carbide crucible: is the use of advanced isostatic pressure equipment with a scientific formula pressed
3. Different performance
Graphite crucible density 1.3kgcm2, silicon carbide crucible 1.7-2.6kgmm2. The service life of graphite crucible is 3-5 times less than that of silicon carbide crucible. Temperature difference between inside and outside crucible graphite crucible 35 degrees, silicon carbide crucible 2-5 degrees. Acid and alkali resistance corrosion resistance is very big, energy saving about 50%.
4. Different prices
Graphite crucible and silicon carbide crucible price difference of about 3 times.
Due to the above excellent performance,Graphite crucible is widely used in metallurgy, casting, machinery, chemical and other industrial sectors, alloy tool steel smelting and non-ferrous metal and alloy smelting. And has the better technical economic effect
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