Graphite is one of the highest boiling point substances in nature melting, melting at 3 850 ± 50 ℃, boiling point is 4 500 ℃, and the boiling point of silicate minerals are 2 750 ℃ (quartz boiling point) or less, well above the boiling point of graphite impurities contained in the boiling point of the silicate. This feature is the basis of high-temperature purified graphite reason perish.

The graphite powder directly into a graphite crucible and heated in inert gas and freon protective gas purification furnace to 2 300-3 000 ℃, a period of time, impurities in the graphite will overflow to achieve graphite purification. High-temperature method commonly used by flotation or more chemically purified 99% of the carbon-carbon graphite as raw material, can be purified graphite to 99.99%, for example, by further improving the process conditions, improve the crucible quality, purity up to 99.995% the above.

High-temperature method can produce more than 99.99% of ultra-pure graphite, but requires to be fixed carbon materials in more than 99 percent, and the equipment is expensive, the huge investment, production scale has limited electric heating technology is demanding and require isolation from the air, or else graphite when the temperature was raised to 450 ℃ in hot air begins to be oxidized, the higher the temperature, the greater the loss of graphite. Only very high quality graphite specific industries (such as defense, aerospace, etc.) using the high-temperature method for small batch production of high-purity graphite.

A lot of research and production practice show that, in many purification methods graphite, although the advantages and disadvantages, but alkali acid method because the production process is simple, easy production environment, lower production costs, does not produce toxic and hazardous waste, conventional waste fluid handling easier and more advantageous features. After roasting and leaching ore solve shorten time, improve the purification effect, to properly resolve issues such as waste water treatment, alkaline acid method may well be the best way to purify graphite industrial production.

Graphite specially processed later, you can create a variety of special materials for the relevant industrial sectors. With the development of modern science and technology and industry applications of graphite is constantly expanding, and has become an important raw material in the high-tech field of new composite materials, has an important role in the national economy. Here are some common graphite deep processing products:

(1) High-purity graphite: widely used in nuclear reactor shielding and reflective materials, solid fuel, rocket nozzles, aerospace equipment parts, advanced refractory and paint, pencil of light industry, electrical industry, carbon brush, electrode in battery industry, fertilizer industry catalyst.

(2) Graphite milk: milk into a graphite tube, forging graphite milk, milk graphite drawing, saving energy and reducing wear additives, etc., were prepared for the conductive paint color picture tube parts, metal forging and hot extrusion die lubricants, metal cold cast coated type agents, mold release agents glass bottles, metal wire drawing lubricants, lubricants antifriction agent.

Such as CRT graphite milk with good adhesion, pore resistance, moisture resistance, corrosion resistance, electrical properties, physical and chemical properties of the coating and stable performance. Widely used in Hitachi, Toshiba, Panasonic, GE, Philips, CPT technology, special coating material is black and white kinescope tube technology. Forging graphite milk has the ideal temperature lubrication, adhesion, stripping easy, chemically stable, non-corrosive, non-toxic, improve molding quality, prolong tool life and other characteristics. Black, non-ferrous metal processing ideal temperature hot stripping lubricants, forging, metal embossing and other industries widely used. Saving energy and reducing wear additive with a strong reduction of friction and wear resistance, heavy extreme pressure, thermal oxidative stability of lubricating oil, no oxidation corrosion and chemical wear, energy efficient, good compatibility, the continuation of lubrication. Improve operating conditions, reduce noise and eliminate smoke and reduce the content of harmful substances in exhaust.

(3) Expandable graphite and flexible graphite products: heating agent for the production of ingot casting, production packing and sealing gaskets, such as flexible graphite sheet, graphite sheet, graphite packing ring, graphite packing, high-strength composite sheet and so on.

(4) Carbon and graphite products: mainly used for heat-resistant refractory, insulation materials, conductive and resistive materials, lubrication and antifriction materials, corrosion-resistant materials, containers and molds. Such as graphite electrodes, graphite mold, carbon rod arc, spectral analysis of the electrode rod, graphite anode plate, electrical carbon brushes, graphite tube, graphite bearings.

(5) Graphite crucible: means for melting a variety of metals.

C/C compound brake has good physical and thermophysics performance as well as anti-wearing performance

Various sizes and property are available according to customers' requirement.

Prefab C/C carbon brake will be most effective base reinforcing material for friction brake parts.

Various sizes and property are available according to customers' requirement

Top Manufacturer of CFC Fasteners, CFC Threaded Rods Screws Nuts, Carbon Composite for Furnace. Quality, Performance and Life Time are well beyond that of our peers

Various sizes and property are available according to customers' requirement.

Main Application

1. Crucibles
2. Heat-insulation
3. Heating Unit
4. Bipolar for Fuel Battery.
5. High Temperature Fastener
6. Others

C/C composites' performance is more stable and more excellent than that of similar graphite products, and has longer life.

　　Natural flake graphite after screening as acid cleaning and in treatment, the treated graphite expansion more than 100 times, flotation was pressed into the graphite paper, that is, flexible graphite

　　flexible graphite is mainly used for sealing industry, flexible graphite sheet is mainly used for electric power, petroleum, chemical industry, flexible graphite paper in these industries is mainly used in machine, pipe, pump, valve seal

　　Graphite foil is a new sealing material foundation, has high temperature resistance, corrosion resistance, radiation resistance, good the electrical conductivity and thermal conductivity, good compression rate, rebound rate and low stress relaxation rate characteristics

　　Graphite foil:

graphite foil and graphite sheet is used for machine sealing,.

　　Graphite tape:

graphite tape is used for thread sealing and sealing flange.

　　Graphite foil with glue:

graphite foil and tape with glue mainly used for thread and flange sealing.

Feature:

• Low ash content / High carbon content / Low gas evolution
• Excellent heat insulation / Low thermal conductivity
• Long life time / Good anticorrosion / High oxidation resistance
• Easy Handling / Good Strength

Application:

• Heat insulation materials
• Electrical elements
• Absorptive materials
• Reinforcing structure for C/C composite components and other products .

A PAN

Special property requirements specially produced.

Anticorrosion cover available(Graphite cloth, Graphite foil, Pitch Painting, etc)

Machine work done to drawing

Size

B RAYON

Special property requirements specially produced.

Anticorrosion cover available(Graphite cloth, Graphite foil, Pitch Painting, etc)

Machine work done to drawing

C PITCH

Special property requirements specially produced.

Anticorrosion cover available(Graphite cloth, Graphite foil, Pitch Painting, etc)

Machine work done to drawing

GRAPHITE POWDER AND RESIN PRESSED GRAPHITE TUBE

Typical Sizes

OD 32 mm X ID 22 mm, Length 3280 mm
OD 32 mm X ID 22 mm, Length 3000 mm
OD 50 mm X ID 38 mm, Length 3050 mm
OD 50 mm X ID 38 mm, Length 5500 mm
OD 38 mm X ID 25 mm, Length 6000 mm

GRAPHITE TUBE

Graphite tubes have a wide application fields, such as:

• Used in furnaces because of graphite's low heat sensitivity
• Used in the production of fluxing tubes used in the metal manufacturing industry
• Other industries using graphite tubes include chemical and scientific industry

Different graphite materials are available for graphite tubes for different applications. Extruded, Vibrated, Reused, Impregnated and Oxidation resistant graphite tubes are available.

Graphite tubes can be manufactured and graphite materials can be selected as per your requirements or working conditions.

Typical Sizes

Description

graphite Part is formed for use in a wide variety of manufactured parts benefiting the automotive, aerospace, semiconductor, chemical, metallurgical, nuclear and electronics industries. It is usually the result of a copper and pure graphite composite, creating a material that is both structurally sound and reliable. Copper graphite is expensive, but it has improved conductivity and strength compared to pure graphite. Other metallic graphite mixtures may be used but may prove less effective.

Formed methods

Special materials can be processed by pressing components directly close to final sizes. The press-to-size-technology reduces the cost of machining in large quantities. The parts formed by this way are called Press-to-size graphite Parts.

Most of graphite Parts manufactured are by mechanical machining, such as Saws, Turning, Milling, Centerless Grinding, Surface Grinding, Optical Tolerances, CNC machining centers, CNC turning centers, etc. The parts formed by this way are called Machined graphite Parts.

graphite material Grade selected

High quality graphite material made in China - The prices of our high quality graphite material are very competitive, so the prices of our graphite Parts formed by this kinds of graphite are very competitive. Please refer to our Isostatically molded graphite, Molded graphite, Extruded graphite and Vibration Molded graphite for detailed specifications, technical data and recommended applications.

High quality graphite material from graphite suppliers - Considering the limitedness of our graphite material, our company also selects graphite material from an inventory of all the major grades from graphite suppliers, worldwide. Normally, we use Tokai, Toyo Sanso, SGL, some American graphite, etc.

Packaging

At GW, shipping department has very rich experience of packaging fragile parts to pack your parts with extreme care and can guaranteed to arrive undamaged. In case damaged due to our packaging, we will replace them at no cost to you.

Special graphite crucible for vacuum coating

Special graphite crucible for vacuum coating is applied to the aluminium evaporation gasification on CPP, PET, BOPP in vacuum to produce aluminum composite foil. It is a large consumption of components which must be used in the production process. The quality of graphite crucible can decide the length of working life and directly affect the product quality and the production cost of aluminum foil.

We have anti oxidation and anti leakage treatment of graphite material, greatly improves the oxidation resistance of graphite crucible, bulk density, flexural strength and compressive strength, enhanced corrosion resistance, hardness, lower porosity and permeability, greatly weakened the  molten aluminum and gaseous aluminum molecular erosion ability and prolong the working life. Quality of graphite crucible for vacuum coating has been greatly improved. The antioxidant, no overflow, no crack, no leakage aluminizing, the evaporation is good, the working life is long, the average furnace reached 18600 meters / roll 50 - 60 furnace, 24000 meters / roll 40 - 50 furnace , the production of 12500 meters/roll, 10000 meters/roll, 9000 meters/roll, 5000 meters/roll, times of furnace have greatly improved.

Specification

Size

graphite crucible

A crucible is a container used to hold metal for melting in a furnace and it is needed to withstand the extreme temperatures encountered in melting metals. The crucible material must have a much higher melting point than that of the metal being melted and it must have good strength even when white hot.

Graphite crucible can withstand the high temperature, and has good resistance to chemical erosions and thermal shock. Especially graphite crucible is ideal for the melting of aluminum, copper and other metals.

Quartz crucible has the advantages of high purity ,high temperature resistance, with big size ,good thermal insulation, economization on energy ,quality stability etc.

Fused quartz crucibles are used in the manufacture of silicon metal for semiconductor wafer applications and polysilicon. In order to produce high quality wafers, starting materials are added to a crucible heated to high temperatures and pulled from the melt as a single crystal. Fused Quartz is one of the few materials that can combine the high purity and high temperature properties required for this process.

GW offers graphite crucibles & Ceramics (Quartz) crucibles in different sizes and types. Whenever you need crucibles, just feel free to contact us, and we will reply you in a shortest time.

Specifiacation