The purchasing pace at the demand end of the international thermal coal market continues to slow down and the international thermal coal price continues to decline. Prices for thermal coal at major international ports continued to fall last week as buyers in Europe slowed in recent days for April, coupled with weaker-than-expected import demand from End users in China. According to China Coal Market net monitoring: Australia Newcastle port thermal coal price index was 253 USD/ton, compared with 309.02 USD/ton, down 56.02 USD/ton, down 18.13%. South Africa's Port Richards thermal coal price Index was $264.5 / mt, down the US $62.72 / mt or 19.17% from US $327.22 / mt. The European ARA Tri-port thermal coal price Index was $281.8 / ton. Does the price of thermal coal in major international ports continue to decline to affect the price of the Magnesium Diboride?
About Magnesium Diboride MgB2 Powder:
Magnesium diboride is an inorganic compound with the molecular formula MgB2. It is a dark gray, insoluble solid. It is an ionic compound with a hexagonal crystal structure. It is an intercalated compound with alternating layers of magnesium and boron. This compound is of interest because it is superconducting at 39 K(−234°C).In terms of composition, MgB2 is markedly different from most transition-metal-based cryogenic superconductors.
Magnesium diboride has been known to scientists for nearly 50 years, but no one has ever studied the material's superconductivity -- whether it can conduct electricity perfectly without resistance when cooled to temperatures close to absolute zero. All that changed in January 2001, when Jun Akimitsu of Aoyama Gakuin University in Tokyo announced that he and his team had found that magnesium diboride became superconducting at 39 degrees Kelvin (-389 degrees Fahrenheit), almost twice the temperature of current intermetallic conductors. The announcement sent experimenters around the world scrambling to replicate and confirm the Japanese findings.
Magnesium diboride is converted into a superconductor at a temperature slightly close to the absolute temperature of 40K (-233 ° C). Its transition temperature is nearly twice as high as that of other superconductors of the same type, and its actual operating temperature is between 20 and 30K. This temperature can be achieved by liquid neon, liquid hydrogen, or a closed cycle freezer. These methods are simpler and cheaper than the industry's use of liquid helium to cool niobium alloys (4K). Once doped with carbon or other impurities, magnesium boride is as good at maintaining superconductivity in the presence of a magnetic field or a current as niobium, or better. Feel free to send an inquiry to get the latest price if you would like to buy Magnesium Diboride MgB2 Powder in bulk.
Specifications of Magnesium Diboride MgB2 powder
Magnesium Diboride powder Purity:98.5% or Customized
Magnesium Diboride powder Size:5-15um or Customized
Magnesium Diboride powder Colour:Black
Magnesium Diboride powder CAS No.:12007-25-9
Magnesium Diboride powder EINECS No.:234-501-2
Magnesium diboride is an ionic compound, with the hexagonal crystal structure. Magnesium diboride at absolute temperature slightly 40K (equivalent to -233 ℃) will be transformed into a superconductor. And its actual operating temperature is 20 ~ 30K. To reach this temperature, we can use liquid neon, liquid hydrogen or closed-cycle refrigerator to finish cooling. Compared to current industry using liquid helium to cool the niobium alloy (4K), these methods are more simple and economical. Once it is doped with carbon or other impurities, magnesium diboride in a magnetic field, or there is a current passing, the ability to maintain the superconducting is as much as niobium alloys, or even better.
How is Magnesium Diboride MgB2 Powder produced?
The preparation method of MgB2 is mainly the reaction synthesis of magnesium powder and boron powder mixed.
MgB2 was obtained by mixing 99.9% magnesium powder with 99% amorphous boron powder at the ratio of 1:2, pressing it into small balls and adding heat in high-pressure nitrogen.
At present, the commonly used method is to mix amorphous elemental boron powder and magnesium powder according to the stoichiometric ratio (or add excessive magnesium), and then put them into a sealed refractory metal container (such as tantalum), and then put them in a quartz tube for vacuum pumping, and then sintered at 700~950℃ for 1~4 h to synthesize MgB2.
Applications of Magnesium Diboride MgB2 Powder:
Potential applications for Magnesium diboride include superconducting magnets, power transmission lines and sensitive magnetic field detectors.
Magnesium diboride is the attention of new materials, the research mainly focused on the synthesis and superconducting element performance for the industrial synthesis and sintering properties, electrical conductivity at room temperature, the liquid aluminum erosion resistance of fluoride such as corrosive resistance study is less, so far no will MgB2 and its composite materials used in aluminum electrolysis cathodic area coverage.
MgB2 is easier to be sintered and densified than TiB2, and its electrical conductivity basically meets the requirements of aluminum electrolysis cathode. Therefore, MgB2 and its composite materials are likely to be widely used as cathode materials for aluminum electrolysis.
Propellants, Explosives, pyrotechnics: Unlike the element boron, which burns incompletely through glass oxide layers that block oxygen diffusion, magnesium diboride burns completely in oxygen or oxidizer mixtures. Therefore, magnesium boride has been proposed as fuel for ramjet jets. In addition, the use of MgB2 in enhanced explosives and propellants has been proposed for the same reason.
Storage Conditions of Magnesium Diboride MgB2 powder
This product should be sealed and stored in a cool, drying chamber and should avoid exposure to the air in order to prevent moisture reunion which will affect the dispersion properties and result use. Stress should be avoided.
Packing & Shipping of Magnesium Diboride MgB2 powder:
We have many different kinds of packing which depend on the magnesium diboride MgB2 powder quantity.
Magnesium diboride MgB2 powder packing:vacuum packing, 100g, 500g or 1kg/bag, 25kg/barrel, or as your request.
Magnesium diboride MgB2 powder shipping: could be shipped out by sea, by air, by express, as soon as possible once payment receipt.
Luoyang Tongrun Nano Technology Co. Ltd. (TRUNNANO) is a trusted global chemical material supplier & manufacturer with over 12-year-experience in providing super high-quality chemicals and Nanomaterials, including boride powder, nitride powder, graphite powder, sulfide powder, 3D printing powder, etc.
If you are looking for magnesium diboride, please feel free to contact us and send an inquiry, email address: email@example.com
Magnesium Boride Properties
|Other Names||magnesium boride powder, MgB2, MgB2 powder,
|Appearance||Gray to Black Powder|
|Melting Point||830 °C|
|Solubility in H2O||N/A|
Magnesium Boride Health & Safety Information
|Transport Information||NONH for all modes of transport|
The United States urges the U.N. Security Council to impose additional sanctions on North Korea in response to its latest ballistic missile launch, including a ban on tobacco and oil exports to North Korea and a blacklist of the Lazarus hacking group.
The United States circulated the draft to the 15 members of the Security Council this week. It was not immediately clear if or when a vote would take place. A resolution requires nine "yes" votes and no vetoes from Russia, China, France, Britain, or the United States.
Russia and China have already voiced opposition to tightening sanctions in response to Pyongyang's launch of an intercontinental ballistic missile last month -- the first since 2017.
U.S. and South Korean officials and analysts also say there are growing indications that North Korea may soon conduct its first nuclear weapons test since 2017, too.
The U.S. -drafted U.N. resolution would expand the ban on ballistic missile launches to include cruise missiles or "any other delivery system capable of delivering a nuclear weapon."
The deal would halve crude oil exports to North Korea to 2 million barrels a year and refined oil exports to 250,000 barrels a year. The resolution also seeks to ban North Korea's export of "fossil fuels, mineral oils, and their distilled Magnesium Diboride are estimated to be influenced by international political situation changes.
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