What Are the Advantages of Graphite Rods Compared to Impregnated Graphite?

Let’s see what the editor from Yixing Yongxu Graphite, a graphite rod manufacturer, has to say about this.

Graphite rods have the following advantages over impregnated graphite:

Increased Volume Shrinkage to Boost Bulk Density During the graphitization process, calcined products lose about 2.6% of their weight. To enhance the bulk density of products in the graphitization process, it is essential to increase the volume shrinkage.

Bulk Density of Calcined and Impregnated Products The degree of impregnation is a standard measure of the impregnation level, which primarily depends on the extent of surface impregnation. The coking value after calcination is related to the adsorption of fillers. Without changing permeability, improving the dispersibility and surface area of fillers can effectively reduce the coking value.

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Route of One-Time Calcination Process To control and achieve the desired bulk density of the final product, it is necessary to measure and control the bulk density of raw products. It can be seen that an excessive amount of binder is detrimental to the bulk density of the product, as about 40% (by weight) of the binder will overflow during the calcination process.

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Practice also shows that too little binder will result in various pores in the raw products, reducing the bulk density and affecting other system performance indicators. To obtain a paste suitable for molding with the minimum amount of binder, adding some graphite to the mixture can reduce extrusion resistance. The shrinkage of raw product blanks during calcination is related to many factors, and these factors often interact with each other.

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In summary, graphite rods offer better control over bulk density and volume shrinkage during the production process, making them more suitable for certain high-performance applications compared to impregnated graphite.