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 MoSi2 Powder?
Introduction to Molybdenum Silicide MoSi2 Powder
Molybdenum silicide was discovered in 1906. Under different conditions, silicon and molybdenum can form molybdenum trisilicide (Mo3Si), molybdenum pentasilicate (Mo5Si3), and molybdenum disilicate (MoSi2). The most important one is the Molybdenum disilicide (MoSi2), which is a Dalton-type intermetallic compound. The atomic combination in its crystal structure shows the coexistence of metal bonds and covalent bonds, and has excellent high-temperature essential characteristics.
Molybdenum disilicide is an inorganic compound, the chemical formula is MoSi2, gray metal solid. Insoluble in most acids, but soluble in nitric acid and hydrofluoric acid. The two kinds of atoms have similar radii and electronegativity, which is similar to metal and ceramic. Molybdenum disilicide is electrically conductive and at high temperatures forms a passivation layer of silicon dioxide on the surface to prevent further oxidation.
It can be applied as high-temperature oxidation-resistant coating materials, electric heating elements, integrated electrode film, structural materials, composite reinforcement, wear-resistant materials, structural ceramics, and other fields of bonding materials.
Physicochemical Properties of Molybdenum Silicide MoSi2 Powder
MoSi2 is a kind of intermediate phase with the highest silicon content in the Mo-Si binary alloy system, and it is a Dalton-type intermetallic compound with a fixed composition. It has dual characteristics of metal and ceramic, and is a kind of high-temperature material with excellent performance. Good high-temperature oxidation resistance, oxidation resistance temperature up to 1600℃, and SiC equivalent; Moderate density (6.24g/cm3); Low thermal expansion coefficient (8.1×10-6K-1); Good electric conductivity; Higher brittle and ductile transition temperature (1000℃) below the hard brittleness of ceramics. Above 1000℃ it is metal-like soft plastic. MoSi2 is mainly used as heating elements, integrated circuits, high-temperature oxidation-resistant coating, and high-temperature structural material.
In MoSi2, molybdenum and silicon are bonded by metal bonds, while silicon and silicon are bonded by covalent bonds. Molybdenum disilicide is gray tetragonal crystal. Insoluble in general mineral acids (including aqua roya), but soluble in nitric acid and hydrofluoric acid mixed acid, has good high-temperature oxidation resistance, can be used as high temperature (<1700℃) oxidation atmosphere work heating element.
In an oxidizing atmosphere, a protective film is formed on the surface of dense quartz glass (SiO2) burned at a high temperature to prevent continuous oxidation. When the temperature of the heating element is higher than 1700℃, SiO2 protective film is formed, which is thickened at the melting point of 1710℃ and fused with SiO2 into molten droplets. It loses its protective ability due to its surface-extending action. When the element is used continuously under the oxidant, it forms a protective film again. It should be noted that this element cannot be used for long periods at 400-700℃ due to strong oxidation at low temperatures.
|Molybdenum Silicide MoSi2 Powder Properties|
|Other Names||molybdenum disilicide, MoSi2 powder|
|Appearance||gray to black powder|
|Melting Point||1900-2050 °C|
|Solubility in H2O||N/A|
Applications of Molybdenum Silicide MoSi2 Powder
MoSi2 is widely used in heating elements. Molybdenum disilicide heating elements can be used at temperatures up to 1800°C for electric furnaces used in laboratories and production environments in glass, steel, electronics, ceramics, and for heat treatment of materials. Although these components are brittle, they can operate at high power without aging, and their resistivity does not increase with operating time.
Main Supplier of Molybdenum Silicide MoSi2 Powder
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 silicon powder, nitride powder, graphite powder, zinc sulfide, calcium nitride, 3D printing powder, etc.
If you are looking for high-quality molybdenum silicide MoSi2 powder, please feel free to contact us and send an inquiry. ([email protected])
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 MoSi2 Powder are estimated to be influenced by international political situation changes.
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