Graphite crucible is an indispensable medium material in metallurgy and chemical industry. Graphite crucible is resistant to corrosion, acid and alkali, and does not react with production materials. It has always been popular in the market. So what is the difference between pure graphite crucible and clay graphite crucible?
1. There are essential differences between pure graphite crucible and clay graphite crucible. The production methods and formulas are different. Pure graphite crucibles are generally machined from graphitized graphite electrodes, and the graphite content reaches above; while clay graphite crucibles are only roasted by a certain proportion of graphite powder doped with clay, with a graphite content of around 10%, and have not been graphitized. Strictly speaking, they cannot be graphite crucibles and should be called clay crucibles.
2. There is a difference in color. The pure graphite crucible is black in color and has metallic luster. Because it is processed from graphite, the graphite crucible has all the characteristics of graphite; the clay crucible is gray-brown in color, has no metallic luster, and has a rough surface.
Note: Some friends say that clay graphite crucible is black. Here, I want to emphasize that it is moisture-proof paint.
3. The usage methods are different. Clay graphite crucibles are generally used exposed in the air at room temperature and heated by charcoal fire, while pure graphite crucibles are used in electric furnaces.
4. The costs are different. The production cost of pure graphite crucible is about - times that of clay graphite crucible. Price and value are directly proportional. Such a gap truly verifies the economics of the market.