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Carbon fiber, alternatively graphite fiber, carbon graphite or CF, is a material consisting of fibers about 5–10 μm in diameter and composed mostly of carbon atoms. The carbon atoms are bonded together in crystals that are more or less aligned parallel to the long axis of the fiber. The crystal alignment gives the fiber high strength-to-volume ratio (making it strong for its size). Several thousand carbon fibers are bundled together to form a tow, which may be used by itself or woven into a fabric. Carbon fibers are usually combined with other materials to form a composite. When combined with a plastic resin and wound or molded it forms carbon-fiber-reinforced polymer (often referred to as carbon fiber) which has a…
Silicified graphite is a kind of composite material which is coated with silicon carbide layer on the surface of graphite material. The hardness of silicified graphite is actually the hardness of SiC, which is only inferior to that of diamond, boron nitride and boron carbide, which is higher than that of tungsten carbide and three aluminium oxide two. The production methods of silicified graphite are 3 methods, such as chemical vapor deposition (CVD), chemical vapor reaction (CVR) and liquid silicon infiltration reaction. Chemical vapor deposition (CVI) method The gas containing silicon and carbon is decomposed by high temperature graphite matrix, and SiC is deposited on the surface of graphite matrix. The raw material is three methyl silane (CH3SiC 3), four…
Quartz crucible, with high purity, strong heat resistance, large size high precision, good heat insulation, energy saving, stable quality and other advantages, more and more widely used. The inspection of the quartz crucible is a very important step, and the detection of the quartz crucible is developing towards the field! 1. quartz crucible can be used below 1450 degrees, divided into two kinds of transparent and opaque. The translucent quartz crucible fabricated by arc method is the basic material for drawing large diameter monocrystalline silicon and developing large-scale integrated circuits. Today, the world's semiconductor industry developed countries have replaced the small transparent quartz crucible with this crucible. He has high purity and strong heat resistance, large size high precision, good…
