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Graphite is one of six allotropes of carbon elements,it’s layered crystal structure.As the special crystal structure,graphite shows the unique physical and chemical properties,such like:silver gray,lubricity,electrical conductivity,corrosion resistance,oxidative stability etc.Graphite divided into two categories,natural graphite and synthetic/artificial graphite. The natural graphite come from the graphite mineral,and there are two types of it, Amorphous graphite and crystal graphite(flake graphite).too much impurities in the graphite ore after mining,so it need to be beneficiation before using.the mainly use of natural graphite is produce refractory material,carbon brush,flexible graphite,lubricant,etc.it also be used for carburetant. Among the carbon industry,the largest production of the graphite products is variety of synthetic/artificial graphite.it’s usually manufactured by petroleum coke or pitch coke,and finished after charge mixture, kneading,molding,baking, graphitization and machining,the production…
Graphite electrode is usually used as extruded graphite materials, because of low resistivity of extruded graphite, conductive performance is good, the price is competitive. Mold geometry increasing complexity and diversification of product applications has led to the discharge of sparks getting high accuracy requirements. Graphite electrodes are the advantages of easier machining, electrical discharge machining removal rate is high, small graphite loss, therefore, part of the group of sparks machine customers gave up and switched to the copper electrode graphite electrodes. In addition, some special shape of the electrodes can not be made of copper, but are more easily molded graphite and copper electrodes heavy, not suitable for processing large electrode, these factors have caused some group of sparks machine…
A lot of people know the important role of Braking system, also a lot of people are willing to spend more money to change this relationship to the life safety of the system. This material is called Carbon ceramic composite materials (Carbon Ceramics: C-SIC), which is a new type of composite material, it is not young, because the material as early as the 1991 Frankfurt international motor trade fair has been published. Only this material due to its production up to more complex, and the production cost is too high, so know in 2001, was formally applied to 911 (996) achieved. And with the continuous development of science and technology, in recent years, the carbon ceramic technology mature gradually, and…
