he graphite heater operation principle
Views£º £¬ Time£º2016/8/15 14:25:42
he graphite heater operation principle
Graphite has high temperature resistance properties of high strength, has excellent chemical structure safe sex, through special processing of graphite, has good conductive, corrosion resistance, low permeability features, is many used in heat exchanger, reaction tank, condensation, burning tower, absorption tower, cooler, heater, pump equipment, filter. Graphite through special processing in the future, also can create all kinds of special materials used in the industrial sector. As the heating furnace with graphite heater to secure thermal field, so the request of graphite with homogeneous structure, stable resistivity. Used for single crystal made of graphite graphite heater request very clean, in order to prevent the impurity elements affect the purity of single crystal. Graphite by means of mechanical processing, packaging, transport, storage process partly adhere to clean to prevent contamination. With the prosperity of science and technology, now we also have many new USES for the development of graphite, graphite parts processing skills are also in constant development, graphite is widely with a variety of forms of carbon in the air and the earth's crust, develop new graphite products in another form, the following brief introduce to us, what are the properties of graphite graphite smooth function depends on the graphite flake intrusive, scale is larger, the smaller the coefficient of friction, smooth function, the better. The conductivity of thermal conductivity, conductive: graphite nonmetalliferous ore is one hundred times higher than normal. Thermal conductivity beyond the iron, steel, lead and other metal materials. Coefficient of thermal conductivity with the increase of temperature drop, even at high temperatures, graphite can into insulator. Each carbon atoms in the graphite conductive because of graphite with other carbon atoms form only 3 covalent bonds, each carbon atom still preserve a free electrons to transfer charge.
Graphite has some properties of the metal and ceramic, heating element has excellent conductivity, thermal conductivity function, but also has more emptiness and small thermal expansion coefficient and thus become one of the most heat shock data graphite, graphite, the temperature coefficient of resistance of small, low thermal inertia, quick heating and cooling, no special request, in the process of workpiece processing contrast is suitable for the use of vacuum furnace heating element. Is comparative good vacuum furnace heating element, has a high temperature resistant, not deformation, impact resistance, radiation area is large, flexibility is good, the advantages of easy fabrication and installation. Made larger heating element, electrical aspect simple voltage reducing current can progress. Then save the heat loss.
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