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What are the advantages of graphite mould?

The Graphite Sintering Mold materials used in diamond

tool manufacturing are mainly graphite materials with ultra-fine particle structure, high purity and high degree of

graphitization. The average diameter of graphite mold material is less than 15 microns, or even less than 10 microns, and the

average pore diameter is less than 2 microns. The graphite mould made of the carbon material has the advantages of small

porosity, compact structure, high surface finish, strong oxidation resistance, etc. The average service life can reach 30 ~

40 times.

Electron sintered graphite molds and transistor supports can be made from artificial graphite materials with minimal

thermal deformation. At present, they are widely used and have become indispensable materials for the development of

semiconductor industry.

The electronic sintered graphite mould of hot-pressed sintered diamond cutter has double functions of heating element and

die support in the manufacturing process of diamond cutter. The quality of graphite mould directly depends on the size

accuracy and appearance shape of diamond cutter.

A Graphite Crucible is a container used for melting and

casting non-ferrous, non-iron metals such as gold, silver, aluminum, and brass. The main reason graphite crucibles are

popular as a manufacturing tool is their thermal conductivity, high temperature resistance, small thermal expansion

coefficient for high temperature applications, and their anti strain properties to rapid heating and cooling. They are

corrosion resistant to acids and alkaline solutions and have excellent chemical stability.

Graphite can be produced from natural graphite that is a naturally occurring crystalline form of carbon. This form of

graphite is manufactured by combining graphite with fire resistant clay or carbon dioxide.

Synthetic graphite is produced by processing petroleum pitch and petroleum coke, which are byproducts of the oil refining

process. It has a purer high fixed carbon content with very few impurities and a low sulphur content.

Types of graphite pipes:

There are two types of Graphite Pipe Ring Screw

Sleeve Rods: one type is machined graphite pipes from raw block graphite material. graphite materials can be: Isostatic

graphite, Molded graphite, Extruded graphite, Vibration graphite, mechanical graphite and carbon brush materials. Another

type of graphite pipe is resin extruded graphite pipes, with powder and graphite powder mixed together, then graphitized in

high temperature. this type of graphite pipes is mainly used for heat exchangers, and can be with bigger length compared to

the first type. It can reach a length of 6-7meters.

Machined graphite pipes is produced from graphite material, so it has the characteristics of graphite material.
Graphite and its products with high strength and acid resistance, corrosion resistance and high temperature 3000 ℃ and low

temperature -204 ℃ and other fine features, are widely used in metallurgy, chemical, petrochemical, high-energy physics,

aerospace, electronics and so on.

Extruded resin graphite pipes: this type of graphite pipe is with resin powder and graphite powder mixed together, then

graphitized in high temperature. This type of graphite pipes is mainly used in heat exchangers, and can be with bigger length

compared to the first type. it can reach a length of 6-7meters. but the diameter is not big.

Resin Graphite Rod, mainly

refers to the phenolic resin extrusion of graphite tube. This graphite tube has the characteristics of graphite, and it has

the characteristics of phenolic resin, so it is a perfect combination. It has excellent corrosion resistance and good thermal

conductivity.This graphite tubes is mainly used in tube type graphite heat exchanger. In many corrosive materials under the

conditions of heat transfer is widely used. The graphite tubes that CFCCARBON LTD produced is with 300 C heat treatment, its

thermal conductivity is about 30-40w / (m.k), much higher than other non-metallic anti-corrosive materials, and higher than

the stainless steel. Therefore, graphite resin tube has long been quietly step into hydrochloric acid, chlor-alkali industry,

and into the chemical industry, pharmaceutical, metallurgy, electroplating, printing and dyeing, paper, environmental

protection and other industries.

Ingot Molds are typically made from metals

such as cast iron, ductile iron, steel or aluminum. Ingot molds are used for casting refined metal such as aluminum, copper,

lead and zinc into various shapes and sizes for future processing.

An ingot is a piece of relatively pure material, usually metal, that is cast into a shape suitable for further

processing.

If you need cast iron, ductile iron, steel or aluminum ingot molds for your smelting operation, Dynaform Technologies is

your best choice. Possessing an extensive range of metalworking molds, our experts will provide you with the right mold for

your needs, regardless of the metal you are working with.

Graphite Block films can shield electronic

devices from electromagnetic (EM) radiation, but current techniques for manufacturing them take several hours and require

processing temperatures of around 3000?°C. A team of researchers from the Shenyang National Laboratory for Materials Science

at the Chinese Academy of Sciences has now demonstrated an alternative way of making high-quality graphite films in just a

few seconds by quenching hot strips of nickel foil in ethanol. The growth rate for these films is more than two orders of

magnitude higher than in existing methods, and the films’ electrical conductivity and mechanical strength are on par with

those of films made using chemical vapour deposition (CVD).

All electronic devices produce some EM radiation. As devices become ever smaller and operate at higher and higher

frequencies, the potential for electromagnetic interference (EMI) grows, and can adversely affect the performance of the

device as well as that of nearby electronic systems.

Graphite, an allotrope of carbon built from layers of graphene held together by van der Waals forces, has a number of

remarkable electrical, thermal and mechanical properties that make it an effective shield against EMI. However, it needs to

be in the form of a very thin film for it to have a high electrical conductivity, which is important for practical EMI

applications because it means that the material can reflect and absorb EM waves as they interact with the charge carriers

inside it.

For example, a grease-filled ball bearing was used on an oven-door latch—but in tests, the bearing seized and kept the

door from latching. Engineers discovered that oven temperatures of over 550°F had, over time, solidified the grease. They

tried a graphite-based dry lubricant and found it better tolerated the high temperatures, but made the bearing balls skid and

damaged the race. The ball bearing was eventually replaced with a graphite/metal alloy solid bearing and the problem went

away.

Graphite Bearings survive temperatures to

1,000°F (535°C) (or higher in nonoxidizing environments), beyond the range of liquid and solid lubricants such as PTFE and

molydisulfide, and above the melting point of polymer bearings. They also work at cryogenic temperatures down to -450°F (-

240°C).

Graphalloy bearings and bushings are available as flanged bushings, thrust washers, and pillow blocks. Compression

strength ranges from 15,000 to 25,000 psi, depending on grade. The bearings are nearly inert and mostly impervious to

industrial processing fluids such as petrochemicals, pulp and paper mill liquor, food compounds (some are FDA-acceptable),

acids, steam, and certain corrosive gases. Applications include kilns, furnace conveyors, dryer rollers, steady bearings,

boiler feed systems, and petrochemical pumps.

Criada: 27-01-22
Último login: 27-01-22
string: 2131231

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