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Installation and Use of Molybdenum Disilicide

What is Molybdenum disilicide?

A molybdenum disilicide heating element is a kind of resistance heating element made of highly pure molybdenum disilicide. In the oxidizing atmosphere, on the surface of the molybdenum disilicide heating element, owing to the high-temperature combustion, a layer of compact quartz protective film is formed to prevent molybdenum disilicide from continuously oxidizing. In the oxidizing atmosphere, its max temperature can reach 1800 °C, and its applicable temperature is 500-1700 °C. It can be widely used in such applications as sintering and heat treatment on ceramics, magnets, glass, metallurgy, refractory, etc. We can offer different types of products—ED type, W type, U type, and L type to customers according to their needs.

 

GENERAL INFORMATION

Made of molybdenum disilicide-based cermets, MOSI2 heating elements withstand oxidation at very high temperatures. Their surface is protected by a thin silica glass layer that forms when exposed to oxygen at elevated temperatures. Although the base cermet is consumed in forming the silica "skin," the decomposition rate is minimal. They provide long performance at elevated temperatures while delivering high power. Element resistance increases slowly over time as the cermet decomposes and the diameter of the heating shank is reduced. MOSI2 heating elements do not exhibit the rapid aging of silicon carbide or metallic iron-chrome-aluminum alloy elements.MOSI2 heating elements operate at the highest temperatures, giving the longest life in oxidizing atmospheres. They can operate in other atmospheres but have reduced maximum temperatures.

 

NSTALLATION AND USE

For the highest temperature and power performance plus the longest life, MOSI2 Heating Elements should be installed free-hanging. The elements should be positioned far away from furnace walls to allow for their natural movement as they deflect due to relief of internal stress and bowing & twisting due to electromagnetic interaction with neighboring elements. The use of furnace accessories, including Heating Element Holders and Heating Element Straps to support and electrically connect the element terminal shanks, is recommended. MOSI2 heating elements are brittle at low temperatures and should be handled with care. At temperatures above 1200ºC, they become ductile, sag under their weight, and assume a "Coke Bottle" shape as the sections of the element's heated length repel each other. MOSI2 Heating Elements with bent terminals can be installed through the side walls of a furnace lining. Heating Element Holders should be used to secure the terminals. When the elements are installed in a manner where they are directly supported by refractories or touch insulation, they should be installed in a manner where they are free to move. When this application method is used, their maximum temperature is lowered as reactions with the silica "skin" and the development of stresses causing catastrophic failure may occur. MOSI2 heating elements exhibit a significant positive temperature coefficient of resistivity. As the element's temperature increases, so does its electrical resistance. Typically a phase angle-fired SCR with current limit capability controls the high currents established when the element is first fired. After warming up, its resistance increases and limits the flow of current by itself.

 

Price of Molybdenum disilicide

Molybdenum disilicide particle size and purity will affect the product's Price, and the purchase volume can also affect the cost of Molybdenum disilicide. A large amount of large amount will be lower. The Price of Molybdenum disilicide is on our company's official website.

 

Molybdenum disilicide supplier

Mis-Asia is a reliable and high-quality global chemical material supplier and manufacturer. It has over 12 years of experience providing ultra-high quality chemicals and nanotechnology materials, including Molybdenum disilicide, nitride powder, graphite powder, sulfide powder, and 3D printing powder. If you are looking for high-quality and cost-effective Molybdenum disilicide, you are welcome to contact us or inquire any time.

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