Now China has become a powerful country in science and technology, but do you know how powerful China's technology is? The manned space station alone is not enough, and now it has successfully broken through the key technology of nuclear fusion, even leading the world by 15 years. Does this mean that China is not far from the artificial sun? It turned out that the fully superconducting tokamak nuclear fusion experimental device developed by China at the Hefei Research Institute of the Chinese Academy of Sciences successfully achieved a record of 101 seconds of continuous operation at 120 million degrees Celsius, and broke the world record. Compared with the previous record in South Korea, China has time has been directly extended by 5 times, and it seems that we are one step closer to the practical stage of artificial sun.
The success of nuclear fusion technology will lead to the development of graphite powder.
Natural graphite is mainly used in refractories, batteries, steelmaking, expanded graphite, brake pads, casting surfaces and lubricants.
The use of graphite as a refractory (heat-resistant) material began before 1900 as a graphite crucible for holding molten metal; this is a small part of today's refractories. In the mid-1980s, carbon-magnesia bricks became important, followed by alumina-graphite shapes. As of 2017, the order of importance is alumina-graphite profiles, carbon-magnesite bricks, Monolithics (gunning and tamping mixtures), and then crucibles.
The crucible begins to use very large flake graphite, while carbon-magnesia bricks do not need that large flake graphite; for these and other aspects, the sheet size required is now more flexible, and amorphous graphite is no longer limited to low-end refractories. Alumina-graphite profiles are used as continuous castings, such as nozzles and grooves, to transport molten steel from the ladle to the mold, and magnesia bricks are arranged in converters and electric arc furnaces to withstand extreme temperatures. Graphite blocks are also used in blast furnace lining components, in which the high thermal conductivity of graphite is very important to ensure the full cooling of the furnace bottom and furnace. High purity monoliths are usually used as continuous lining rather than carbon-magnesia bricks.
The use of graphite in batteries has increased since the 1970s. Natural and synthetic graphite are used as anode materials for the construction of electrodes in major battery technologies.
Demand for batteries, mainly Ni-MH and Li-ion batteries, led to an increase in demand for graphite in the late 1980s and early 1990s-an increase driven by portable electronic devices, such as portable CD players and power tools. Laptops, mobile phones, tablets and smartphones have increased the demand for batteries. Electric vehicle batteries are expected to increase demand for graphite. For example, the lithium-ion battery in the all-electric Nissan leaf contains nearly 40 kilograms of graphite.
Radioactive graphite from old nuclear reactors is being studied as fuel. Nuclear diamond batteries have the potential to provide long-term energy for electronic products and the Internet of things.
The natural graphite in steelmaking is mainly used to increase the carbon content in molten steel; it can also be used to lubricate dies used for extruding hot steel. Carbon additives face competitive prices from alternatives such as synthetic graphite powder, petroleum coke and other forms of carbon. A carburizer is added to increase the carbon content of the steel to a specified level.
Natural amorphous and fine flake graphite is used for brake linings or brake shoes of heavier (non-automotive) vehicles and becomes important as an alternative to asbestos is needed. This use has been important for a long time, but non-asbestos organic (NAO) components began to reduce the market share of graphite.
Casting surface and lubricant
The mold cleaning solution for casting is a kind of waterborne amorphous or fine flake graphite coating. Use it to paint the inside of the mold and let it dry, leaving a fine graphite coating to ease the separation of the casting after the hot metal cools. Graphite lubricant is a special product used at very high or very low temperatures. It is used as forging die lubricant, anti-jamming agent, gear lubricant for mining machinery and lubricating locks. There is a great need for low-grained graphite or even better non-grained graphite (ultra-high purity). It can be used as dry powder in water or oil, or as colloidal graphite (permanent suspension in liquid). The metal can also be impregnated into graphite to form a self-lubricating alloy for applications in extreme conditions, such as machine bearings exposed to high or low temperatures.
Since the 16th century, all pencils have been made of English natural graphite, but the most common modern pencil lead is a mixture of powdered graphite and clay. It was invented by Nicolas-Jacques Cont é in 1795.
Today, pencils are still a small and important market for natural graphite. About 7 per cent of the 1.1 million tonnes produced in 2011 was used to make pencils. The use of inferior amorphous graphite is mainly from China.
Graphite is probably the most commonly used lubricant in pine derby.
Graphene is used to make 40mm acoustic drivers that transmit sound to the ear. A dynamic driver, also known as a moving coil driver, uses an electric voice coil to move the cone and generate sound waves. These drives are made up of more than 95% graphene and retain most of the mechanical properties of the material, while being easier to form and cheaper to manufacture. It is a lightweight, rigid and low-density material, which is very suitable for loudspeaker diaphragm. The heavier the loudspeaker, the more difficult it is to drive. Because graphene has such a high strength-to-weight ratio, graphene drivers can reduce the power required to move coils back and forth, resulting in improved efficiency and better sound.
Natural graphite has been used in zinc-carbon batteries, motor brushes and various professional applications. Graphite with different hardness or softness will produce different qualities and tones when used as an artistic medium. The railway usually mixes graphite powder with waste oil or flaxseed oil to form a heat-resistant protective coating for exposed parts of steam locomotive boilers, such as smoke boxes or fire boxes.
The price is influenced by many factors including the supply and demand in the market, industry trends, economic activity, market sentiment, and unexpected events.
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Because of the conflict between Russia and Ukraine, there is a shortage of natural gas supply. At the same time, other renewable energy sources cannot produce enough electricity, so electricity prices have soared in many countries of the world. For this reason, I assume the supply and prices of the graphite powder would keep being influenced by the high energy prices.
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