Graphite bearing lubricants are generally solid lubricants. They are synthesized from a variety of materials with good lubricity. They are embedded in bearings and sliders and play a self lubrication role in solid materials. Under certain conditions, the traditional lubricant can be replaced to obtain good self lubrication effect. Bearing is a kind of sliding component commonly used in the mechanical industry, and the material is made of metal, nonmetal and composite material. Graphite bearing is a kind of carbon bearing developed and developed on the basis of metal bearing, with graphite material as the main material. Graphite bearings have different characteristics from metal bearings, mainly in self lubrication, high temperature resistance, corrosion resistance, light weight, etc.. Bearings are made of rolling bearings and plain bearings, and graphite bearings are mostly used in plain bearings. Applied in the industrial departments of food and beverage, textile, chemical etc. in transport, drying machine, textile machine, submersible pump motor bearing, these parts such as grease lubricant will inevitably cause pollution, while the graphite self-lubricating bearing strong corrosion resistance, do not make use of lubricating oil for long-term operation.

　　Bearing is a kind of sliding parts commonly used in machinery industry. Graphite bearing is a kind of carbon bearing developed and developed on the basis of metal bearing as the requirement of mechanical equipment. Carbon bearing has different characteristics from metal bearings, such as self lubrication, high temperature resistance, corrosion resistance, light weight and so on. With the development of science and technology, graphite bearings have been further expanded. Bronze graphite oil impregnated bearings and embedded graphite bearings have been manufactured. It provides more space for bearing selection under different working conditions, and meets the requirements of different technical conditions. In addition, carbon composite bearings will be the future direction of bearing materials because of its design and unique material functions.

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　　Flexible graphite gasket is from pure graphite plate drilling or cutting and it has good corrosion resistance, high / low temperature, compression elasticity and high strength good, complex geometric gasket circular is widely used in all kinds of pipes, valves, pumps, pressure vessels, heat exchanger, and condenser generator, air compressor, exhaust pipe, refrigerator etc..

　　Flexible graphite gasket is from pure graphite plate drilling or cutting and it has good corrosion resistance, high / low temperature, compression elasticity and high strength good, complex geometric gasket circular is widely used in all kinds of pipes, valves, pumps, pressure vessels, heat exchanger, and condenser generator, air compressor, exhaust pipe, refrigerator etc..

　　Feature editor

　　Flexible graphite, also called expanded graphite, is made from scale graphite and treated by chemical treatment to produce interlayer compounds. At 800-1000 degrees of high temperature, the interlayer compound turns into gas, expands the scale graphite about two hundred times, becomes the advantages of heat conduction of cotton, overcomes the shortcomings of brittleness, and thus shows good tightness. Loose and porous and elastic. In the high temperature, high pressure or radiation conditions, no decomposition, deformation or aging, chemical stability. The birth of flexible graphite, declared in the field of chemical seals, "old-fashioned" era is coming to an end. Compared with asbestos gasket, flexible graphite has the following obvious advantages:

　　- no radiation, no pollution. Flexible graphite does not contain harmful ingredients to the human body, while asbestos products are harmful to the human body and pollute the environment.

　　Two, high temperature resistance. Flexible graphite reinforced composite gaskets can withstand 1650 degrees of high temperature, even if the chemical equipment melting, it is still safe. The asbestos products at 500 degrees of temperature, the internal crystallization of water will be broken down, so that the powder itself, and lose efficacy.

　　Three, a wide range of applications. Flexible graphite in addition to strong oxidizing acid, the ability and most of the chemical medium, including for radioactive chemical medium, and asbestos products adaptability is poor, can not be used in radioactive media. Some chemical tower, heat exchanger and so on, require the connection parts are not insulated, flexible graphite can do, slate products can not.

　　Four, the use of simple and convenient. Flexible graphite gasket coefficient is only half of asbestos products, that is to say, to achieve the same sealing effect, tighten the screws can be much smaller. Flexible graphite in addition to the above obvious characteristics, but also has excellent sealing performance, compression, and characteristics of good elasticity, oxidation resistance, self lubrication and strong plasticity, and has good electrical conductivity, density ratio, etc., can produce all kinds of adjustment of diesel engine and compressor etc. all kinds of pipeline the flange gasket, etc..

　　The pan based Graphite felt was treated by a special process high temperature graphitization, with light weight,high carbon content,ablation resistance,corrosion resistance,high purity,high temperature without volatile,small coefficient ofthermal conductivity,without any deformation.

　　The graphite felt is normally classified into asphaltic based graphite felt, PAN based graphite felt &rayon-based graphite felt.

　　The mainly application of the graphite felt is electric conduction in the photovoltaic industry, as the heat retaining material, thermal insulation material for the smelting furnace and vacuum furnace, and in chemical industry it could be the filtration material. it is used to vacuum furnace(especially suitable for the single crystal furnace) as insulation heat preservation material,also can be used as infrared heating wire and electrode materials.

　　The graphite felt is formed after above 2000℃ high temperature treatment under inert gas or vacuum. The polypropylene cyano is the major raw material. The polypropylene cyano carbon felt or rayon-based carbon feltis cuttd into the specific dimension, and loaded into the graphite vessel after rolled. The graphite vessel will be setted in the high temperature furnace, protected in vacuum or by high pure inert gas. It's heated up to 2200-2500℃with the heating rate 100-300℃/h, then get the final product after naturally cooled to 100℃ .

　　Our products involved in the field of aerospace, vacuum metallurgy, solar new energy, new chemical materials, we are the manufacturer which is specializing in the production of rigid composite graphite felt and high temperature and high purity graphite felt materials for domestic in China. The main products are carbon felt, graphite felt,rigid composite graphite felt and the auxiliary products such as carbon cloth, carbon rope and so on ,our products are widely used in all kinds of high temperature vacuum furnace equipments such as single crystal growth furnace, polycrystalline casting furnace, polycrystalline furnace, vacuum sintering furnace, hot pressing furnace, heat balance furnace and electric magnetic induction furnace ,non-oxidizing atmosphere high temperature equipment and high purity silicon hydrogenation furnace etc..

　　The Graphite crucible, which is divided into general type of graphite crucible, special type of graphite crucible, high purity graphite crucible.Graphite crucible, which is divided into general type of graphite crucible, special type of graphite crucible, high purity graphite crucible.The main raw materials of Graphite crucible is natural crystalline graphite. Therefore, it maintains the original natural graphite various physical and chemical properties.

　　Graphite crucible has good thermal conductivity and high temperature resistance;Uder the high temperature, the thermal expansion coefficient is small, rapid heating, quench with certain anti-strain properties. The strong corrosion resistance of acid, alkaline solution has excellent chemical stability. Graphite crucible, with their more excellent performance, in metallurgy, casting,mechanical, chemical and other industrial sectors, is widely used in smelting and alloy tool steel smelting of non-ferrous metals and their alloys . Besides,it has achieved a good technical and economic results.

　　Graphite crucible machined from high pure graphite and widely used in the gold,silver,platinum and other noble metal's melting.If it's used in oxygen atmosphere,it wil start to be oxygenized when the temperature is higher than 700-800°c. If it's used in the protective atmosphere, it can stand more than 2000°c.

　　Graphite crucible used for smelting gold is specialized in melting gold in headgear and jewelryindustry. That requests graphite material has high density and purity, ablation-resistance, and it can be used many times. We can machine various crucibles accordingto customer's requirement.Graphite crucible can be used for non-ferrous metal smelting and casting, dissolving gold or silver ornaments, analysis of special type steel, sintering hard metal.

　　The graphite crucibles are widely used in such fields as industrial furnaces, mono-crystalline silicon machinery, mono-crystalline silicon machinery, electron, semi-conductor, metallurgy, oil, chemistry, textile, electrical machinery, electrical equipment, electrical furnace, traffic, communication industry, medicine, etc.

　　There are many kinds of graphite products, such as ordinary graphite, impregnated graphite, fine graphite, high purity graphite, isostatic graphite, and a very special kind of graphite, that is, electric spark, graphite, or EDM graphite!

　　EDM graphite is mainly used in the production of dies. It has excellent properties that copper metal can not match. The electric spark graphite itself has the characteristics of non-metallic material, and it also has some characteristics of metal. Electric spark graphite density is smaller than copper, light quality, can bring many benefits to production; easy processing; from hardness, electric spark graphite is 1/3 of copper metal; and conductivity is less than metal copper;

　　The high temperature resistance of electric spark graphite is better than that of copper metal. The melting point of copper is more than 1300 degrees, while the melting point of electric spark graphite is about 3800 degrees. High melting point can be greatly reduced, after the electronic pulse produced by a large number of high temperature, so that melting itself, causing sublimation phenomenon. In addition, the electric spark graphite processing is simple, and the production speed is fast, and the production capacity is not to be worried!

　　EDM is a new processing technology in machinery manufacturing industry, EDM of many high hardness metal processing, and processing of complex shape, high precision parts, can be used as a tool for the anode copper material, also can use graphite materials. As a tool for EDM, the graphite material of electrode must have the following conditions:

　　(1) the structure is compact and the tissue is homogeneous; there should be no coarse particles and large pores;

　　(2) with high mechanical strength and good processability, it can work out complex shapes or sharp angles and flakes;

　　(3) the graphite tool electrode has a certain loss in the process of EDM, and this loss should be as low as possible;

　　(4) the discharge characteristics are stable and the processing speed is faster. Therefore, graphite with fine grain structure or graphite with fine particle structure is generally used in EDM, and the physical properties of graphite are best isotropic. Therefore, the graphite material with fine grain structure is the most popular graphite material used in China's electrical discharge machining.

　　In 2005, the domestic needs of EDM graphite is estimated to be 4000T, of which about 25% of high-grade graphite is used, and about 75% of middle and low-grade graphite is used. It is likely to rise by an annual increase of 10%. The use of imported high-grade graphite (mainly isostatic molding of isotropic graphite), accounting for about 10% of the total amount. There are many kinds of isotropic graphite for EDM abroad. They can be used in rough, semi finish, finish machining, fine machining, super fine machining and precision machining (line cutting, etc.).

　　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 very high strength-to-weight ratio, and is extremely rigid although somewhat brittle. However, carbon fibers are also composited with other materials, such as with graphite to form carbon-carbon composites, which have a very high heat tolerance.

　　Carbon fibre plates can be used to replace or substitute aluminium or steel plates in a wide range of projects. Their superior mechanical properties mean that plates of the same weight as an aluminium or steel tube can be much stronger, or that tubes of the same strength can be much lighter.

　　Carbon Fiber Sheet is high strength and extremely light weight. It is the most commonly used composite fabric with applications in all areas of industry, such as household applications, machines ,aerospace,spaceflight and other high-tech applications. Carbon Fiber sheet has super knitting technology and exact molding technics and equipments, so we can produce full Carbon series products to meet all kinds of process requirement on composite materials.

　　Our company can provide 3K carbon fiber laminated plate ,veneer, sheet ,panel , board with different thickness (provide CNC cutting service); 100% Pure carbon fiber plate UD carbon fiber core with 3K carbon fiber exterior ;carbon glass plate: Black glass fiber core with 3K carbon fiber exterior.

　　Our company specializes in high quality carbon fiber products in great variety, like carbon fiber rods, tubes, plates, profiles etc.

　　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 silicon chloride, hydrogen, silicon vapor and so on. The deposition temperature range is wide, from 1175 to 1775. The SiC layer produced by this method is very dense, uniform in thickness and approximately 0.1 to 0.3mm in thickness. But the combination of SiC and graphite as pure mechanical bonding and weak binding force in the blast temperature when SiC layer is prone to cracking and spalling.

　　Chemical vapor reaction (CVR)

　　The raw material is coke powder and excess quartz sand or amorphous silica powder. When heated to 2000 DEG C, a chemical reaction is generated to produce SiO vapor. SiO vapor reacts with the carbon matrix to form SiC. The SiC layer and the carbon substrate two has no obvious interface, are firmly combined, can not drop in temperature change and high load, but CVR method is SiO gas penetrated into the carbon based body reaction, therefore, still retain a porous carbon matrix, are used as sealing material, filling with resin impregnated or CVD method the pore.

　　Liquid silicon infiltration method

　　This method is also a kind of CVR. Under the vacuum condition, the carbon matrix is directly immersed in molten silicon liquid when heated to 800 DEG C. The liquid silicon gradually enters the carbon matrix and reacts to form SiC. Raw material is 99.9999% pure silicon. The thickness of SiC layer is up to 3.5mm. After reaction, the carbon matrix contains about 17% of the free silicon, filling the pores of the matrix, so that the matrix becomes dense and impermeable. However, the presence of free silicon reduces the corrosion resistance and high temperature oxidation resistance of silicified graphite.

　　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 heat insulation, energy saving, stable quality etc..

　　2, can not touch the HF and, at high temperature, and carbonate was easily caustic and alkali metal.

　　3. quartz crucibles are suitable for melting samples with K2S2O7, KHSO4 as flux, and using Na2S207 (first drying at 212 degrees) to treat samples with flux.

　　4. quartz brittle, easy to break, use should pay attention to.

　　5. except HF,

　　Quartz glass crucible

　　Common dilute inorganic acids can be used as cleaning solutions. Quartz crucibles used for drawing monocrystalline silicon in China are 18 inches and 20 inches 22 inches. There are also 22 or more crucibles used by manufacturers. At present, the crucible technology produced by large crucible manufacturers in China is quite mature. Its production and use of raw materials, quartz sand imported by the United States and Norway high purity quartz sand two. There are also small factories using homemade materials. The quartz crucibles produced by their raw materials have certain influence on the stability of the drawn monocrystalline silicon.

　　The current production of crucible coating technique has been used by most manufacturers is in ordinary quartz sand solution for crucible surface coated with a layer of two barium oxide solution so as to form a dense layer, the dense layer can prevent the silicon and silicon high temperature quartz crucible drawing process to improve reaction rate.

　　Use and maintenance of quartz crucibles

　　1. The main chemical composition of quartz crucible is silicon dioxide, except hydrofluoric acid and other acids, easy and caustic and alkali carbonate.

　　2. The quartz crucible has a good thermal stability and can be heated directly on the flame

　　3. Quartz crucibles, like glassware, are easy to break and use with great care

　　4. Using quartz crucible with potassium bisulfate (sodium), sodium thiosulfate (at 212 degrees Celsius for drying) such as flux, melting temperature will not exceed 800 degrees celsius.

　　The process of graphite impregnation is to fill the pores of carbon graphite materials with different forms of carbon. The purpose of the dense and impregnated graphite impregnation process is to produce high density products,

　　High density of liquid penetration. However, the densification is limited, it is impossible to require all the pores of dense products, but only A layer that is not dense enough for the product. Deposited on the surface of the graphite carbon covered layer, can significantly change the performance of another, because

　　The deposited carbon layer becomes another working surface. The characteristics of the dense carbon layer will be described below. Two, the need to dip the product of 1 small size graphite electrode and joint blank, a variety of graphite anode. These products have a high density and strength, low resistivity, so the first half of the finished product is soaked with coal tar and then graphitized. After coal asphalt impregnated a product the product volume density from 1.55 g / M 3 to about 1.65 g / cm 3, porosity decreased from 25 ~ 32 to 22 ~ 25%, the compressive mechanical strength can be increased to around 9.8 MPa, the resistivity can be decreased by about 10%.

　　For the requirements of high strength and high density products after two, three or four times (after repeatedly dipping roasting, baking again after impregnation), can make products to capture the high volume density of 1.85 g / cm'3, porosity decreased 116% compression! Strength increased to 39.2 MPa. 2 the production of high quality graphite anodes used in diaphragm salt solution electrolysis cells. After impregnation with coal tar graphite anode, the general can make the kitchen 8--9 months, not impregnated graphite anode can only be used for 5 - 6 months. The main reason is the influence of graphite anode life to the anode electrolyte penetration hole, and hydroxyl ions, sulfate ions and hypochlorite ions in the electrolyte in the anode discharge produces nascent oxygen.

　　According to the relevant information, some of the oil impregnated anode service life doubled. But too much oil will cause the deterioration of the operation of the electrolyzer, the use of high current density of the mercury electrolytic tank, but there is no oil immersed anode 3 chemical equipment requirements of impermeable graphite. Graphite is porous material, so the liquid and vapor can penetrate, available organic resin (such as phenolic resin, furfural acetone resin impregnated graphite products processing) in advance well, and after immersion in the appropriate temperature curing of the resin, can make liquid and gas of graphite products to low permeability in fact, the degree of harm, but also improve the mechanical strength of several times, and products, thermal conductivity is not reduced. This corrosion resistance, good thermal conductivity of the impermeable graphite chemical equipment is widely used.

　　The graphite felt is normally classified into asphaltic based graphite felt, PAN based graphite felt &rayon-based graphite felt. The mainly application is electric conduction in the photovoltaic industry, as the heat retaining material, thermal insulation material for the smelting furnace and vacuum furnace, and in chemical industry it could be the filtration material.

　　The carbon/ graphite felt is made of oxidized PAN short cut fiber. And after opening, carding,

　　lapping, needling,it is made into a certain density and thickness. Some excellent performances such as high purity, soft texture, No dus and chemical corrosion resistance will be obtained by

　　special carbonization and graphitization process .The carbon/graphite felt can improve the current

　　density of the liquid flow battery, and it has the protective effect on the corrosion resistance of the bipolar plate and is mainly used as the electrode of the liquid flow battery industry.

　　The graphite felt is formed after above 2000℃ high temperature treatment under inert gas or vacuum.The polypropylene cyano is the major raw material. The polypropylene cyano carbon felt or rayon-based carbon feltis cuttd into the specific dimension, and loaded into the graphite vessel after rolled. The graphite vessel will be setted in the high temperature furnace, protected in vacuum or by high pure inert gas. It's heated up to 2200-2500℃ with the heating rate 100-300℃/h, then get the final product after naturally cooled to 100℃.

　　PAN Based Carbon Felt is used in high temperature insulation in resistance or induction heated vacuum furnaces and inert gas furnaces. Made of carbon or graphite fibers, these materials have low thermal conductivity and vapor pressure. it is considerably less expensive and more effective than metallic radiation shields and may be used to replace them, with power savings of up to 75%. The low specific heat and low density permit rapid heating and cooling of furnaces.