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Physicochemical properties and application of molybdenum disilicide MoSi2

Since 2022, Russia-Ukraine geopolitical conflicts have intensified, and global energy prices have risen sharply, with international natural gas prices hitting historic highs. As the most important transitional energy source in the transition from fossil energy to non-fossil energy, the share of natural gas in primary energy has increased from 14.6% in 1965 to 24.7% in 2020.  The global gas price indices showed a unilateral downward trend from 2018, bottomed out in 2020, and remained low for a long time. However, since July 2020, the global gas prices have gradually fluctuated upward, and the impact of geopolitical events made the Dutch TTF gas price even hit record highs repeatedly.

An analyst of a securities company believes that the core catalyst of this round of global gas market lies in the lack of investment in upstream oil and gas resources caused by long-term low prices. Since 2020, although the epidemic has led to a decline in demand, the decline in supply has been faster, resulting in a large inventory consumption. In 2021, demand will recover faster than supply (the supply-side is less sensitive to prices, which will be reflected in investment).  

As the world's two largest gas Molybdenum disilicide MoSi2 powder are also expected to change significantly.

Molybdenum disilicide MoSi2 powder overview

Molybdenum disilicide MoSi2 powder  is an inorganic compound with the chemical formula MoSi2, which is a gray metallic solid. Insoluble in most acids, but soluble in nitric acid and hydrofluoric acid. The radii of the two kinds of atoms are not much different, the electronegativity is relatively close, and they have properties similar to those of metals and ceramics. Molybdenum disilicide is conductive and can form a passivation layer of silicon dioxide on the surface at high temperatures to prevent further oxidation. It is used in high-temperature anti-oxidation coating materials, electric heating elements, integrated electrode films, structural materials, reinforcing agents for composite materials, wear-resistant materials, and connecting materials for structural ceramics.

Physicochemical properties of molybdenum disilicide MoSi2

Molybdenum disilicide MoSi2 is an 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. With the dual characteristics of metal and ceramics, it is a high-temperature material with excellent performance. Very good high temperature oxidation resistance, the oxidation resistance temperature is as high as 1600℃, which is equivalent to SiC; moderate density (6.24g/cm3); low thermal expansion coefficient (8.1×10-6K-1); good electrical and thermal conductivity Properties; higher brittle-to-ductile transition temperature (1000℃) below has ceramic-like hardness and brittleness. It is metal-like soft plasticity above 1000°C. MoSi is mainly used as heating elements, integrated circuits, high-temperature anti-oxidation coatings and high-temperature structural materials.

In MoSi2, molybdenum and silicon are connected by metal bonds, and silicon and silicon are connected by covalent bonds. Molybdenum disilicide is a gray tetragonal crystal. It is insoluble in general mineral acids (including aqua regia), but soluble in a mixed acid of nitric acid and hydrofluoric acid. It has good high temperature oxidation resistance and can be used as a heating element working in high temperature (<1700°C) oxidizing atmosphere.

In an oxidizing atmosphere, a protective film is formed on the surface of the dense quartz glass (SiO2) that burns at a high temperature to prevent continuous oxidation of molybdenum disilicide. When the temperature of the heating element is higher than 1700°C, a SiO2 protective film is formed, which fuses at a melting point of 1710°C, and merges with SiO2 into a molten drop. Because of the action of its surface extension, it loses its protective ability. Under the action of the oxidant, when the element is used continuously, it forms a protective film again. It should be noted that due to the strong oxidation at low temperatures, this element cannot be used for a long time in a temperature environment of 400-700°C.

Molybdenum disilicide MoSi2 powder application

Molybdenum disilicide MoSi2 is used in high-temperature oxidation-resistant coating materials, electric heating elements, integrated electrode membranes, structural materials, composite reinforcement materials, wear-resistant materials, structural ceramic connecting materials and other fields, and are distributed in the following industries:

1) Energy and chemical industry: MoSi2 is used as electric heating element, high temperature heat exchanger of atomic reactor device, gas burner, high temperature thermocouple and its protection tube, smelting vessel crucible (used for smelting sodium, lithium, lead, bismuth, tin and other metals) .

2) Microelectronics industry: MoSi2 and other refractory metal silicides Ti5Si3, WSi2, TaSi2, etc. are important candidates for large-scale integrated circuit gates and interconnections.

3) Aerospace industry: MoSi2 as a high-temperature anti-oxidation coating material, especially as a material for turbine engine components, such as blades, impellers, combustion chambers, nozzles and sealing devices, has been widely and in-depth Research and application.

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4) Automobile industry: Molybdenum disilicide MoSi2 is used in automobile turbocharger rotors, valve bodies, spark plugs and engine parts.

Molybdenum disilicide MoSi2 price

The price of molybdenum disilicide MoSi2 varies randomly with factors such as production costs, transportation costs, international conditions, exchange rates, and the supply and demand relationship of molybdenum disilicide MoSi2. Tanki New Materials Co., Ltd. aims to help various industries and chemical wholesalers find high-quality, low-cost nanomaterials and chemicals by providing a full set of customized services. If you are looking for molybdenum disilicide MoSi2 material, please feel free to contact to get the latest price of molybdenum disilicide MoSi2.

Molybdenum disilicide MoSi2 supplier

As a global supplier of molybdenum disilicide MoSi2, Tanki New Materials Co., Ltd. has extensive experience in the performance, application and cost-effective manufacturing of advanced and engineered materials. The company has successfully developed a series of powder materials (titanium silicide, tantalum silicide, zirconium silicide, etc.). High-purity targets, functional ceramics and structural devices, and provide OEM services.

Chemical Composition of Molybdenum Silicide MoSi2 Powder

MoSi2MoSiCSFeSNi
>99%>60%balance0.2%0.02%0.19%0.015%0.05%


Recently, the Turkish government announced that the Turkish President has signed a presidential decree to provide incentives for its Black Sea gas field development projects, including tax exemptions and other preferential measures.  

With a fixed investment of 145.1 billion Turkish lira ($10 billion), the project will employ 1,018 people and produce 14 billion standard cubic meters of gas per year, the decree reads. The incentives involved include tariff and VAT exemptions, as well as a range of tax cuts.

In June 2021, Turkish drill ships discovered 135 billion cubic meters of natural gas in the Sakaria field in the Black Sea, bringing Turkey's total gas discoveries in the region to 540 billion cubic meters.  

Turkey imports almost all of its annual gas consumption of about 50 billion cubic meters.  

Except for natural gas, the supply and prices of many other Molybdenum disilicide MoSi2 powder will continue to be influenced by international situations.

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