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    Tungsten Disulfide Powder

    tungsten disulphide powder, also known as WS2, is one of the most lubricious substances in the world and offers dry lubricity unmatched by other lubricants, including Molybdenum Disulfide (MoS2) or Graphite. It also has extremely high temperature and pressure resistance ranging from -450 degrees F (-270o C) to 1200 degrees F (650o C) in a normal atmosphere and up to 2400 degrees F (1316o C) under vacuum.

    WS2 occurs naturally as the rare mineral tungstenite and is a component of certain catalysts used for hydrodesulfurization and hydrodenitrification. It has a layered structure related to MoS2 with W atoms arranged in a trigonal prismatic coordination sphere.

    In its crystalline form, it has an oxidation state of -2 to +4 and is nontoxic. It is highly resistant to fluorine gasses, sulfuric and hydrofluoric acids and hot, caustic alkaline solutions and can be applied to all stable metal substrates.

    The coating can be sprayed onto the substrate with dry pneumatic air at 120 psi, without the need for any binders or spraying equipment and can be done at room temperature. The coated film will be 0.5 microns thick and will mirror back all of the characteristics of the substrate.

    This coating is extremely effective in extending the life of bearings where lubricants are not available or are required to be able to withstand high torque and operating temperatures. It is suitable for a wide variety of applications from miniature bearings used in dental hand pieces to large bearings used in electrical power plants.

    2023-03-19

    Blog

    What is silicon nitride used for?

    Silicon Nitride has been discovered since the beginning of the 19th Century. However, it's difficult to manufacture because of its covalent bonds. A type of engineering ceramic with excellent chemical and thermal stability, silicon nitride is high in strength and hardness. The polycrystalline form of Silicon Nitride is made of single crystals embedded in the amorphous, partially crystalline glass phase matrix. These properties are not dependent only on the inherent silicon nitride properties, but also on size and morphology, and volume fraction, and chemical properties, of the glass phase located at silicon-nitride grain borders. Si3N4 can be used for both traditional and more innovative applications. Si3N4 has many advantages, including its light weight, superior bending strength and wear resistance, as well as being able to endure the most harsh environments.
    Automobile industry.
    The automotive sector is one of the most important uses of sintered silicone nitride. For example, there are electric plugs in diesel engines that provide faster start-up, precombustion chambers that produce less emissions, lower start-up, and more noise and turbochargers. For spark ignition engines silicon nitride helps reduce wear rocker pads and turbocharger turbines reduce engine lag. Exhaust control valves increase acceleration.

    Bearing.
    An all-ceramic silicon nitride bearing does not just have ceramic components, it also has a ceramic hybrid bearing. For example, the ceramic ball and steel seat rings are made of silicone nitride. The silicon nitride clays offer superior shock resistance to other ceramics. Ball bearings constructed from silicon nitride ceramics have high-performance bearings. NASA's main engine uses silicon-nitride bearings. Because silicon nitride balls bearings are more durable than metal, they have less contact with bearing tracks. This is a better alternative to traditional metal bearings. They can lower friction by as much as 80% and extend their service lives by 3-10 times. Silicium nitride is 79% lighter that tungsten caride balls. Silicon nitride bearings are used in automotive bearings of high quality, as well industrial bearings. They can also be used for racing, cycling, skateboarding, and roller skating. These bearings can be used in areas where metals cannot be used due to corrosion.

    High-temperature material.
    Since long, silicon nitride is used for high temperatures. Particularly, silicon nitride has been found to be one of the few integral ceramic material that is capable of withstanding severe thermal shocks as well as thermal gradients created by hydrogen / oxygen rocket engines. NASA scientists employed advanced rapid prototyping technology in order to produce one-inch combustion chamber/nozzle/thruster assemblies. This was done to demonstrate the capability of complex configurations. Five cycles were run on the thruster with hydrogen/oxygen propellant. The last cycle was a five-minute one to 1320°C.

    Health profession.
    There are many orthopedic uses for silicon nitride. It can be substituted for PEEK and titanium in spinal fusion devices. The materials' strength, durability, reliability, and resistance are significantly higher than those of PEEK (polyether ketone) and titanium. It can be used in compositions that have antibacterial, antifungal and antiviral properties.

    Tools for metal cutting and welding.
    It is used in cutting tools because of its hardness, thermal stability, wear resistance and toughness. It is particularly recommended to high-speed cast iron machining. Sintered silicon Nitride can be used to machine cast iron, nickel-based alloys, and hard steel at 25 times the speed of conventional materials, such as tungsten caride. Manufacturing output can be greatly affected by the quality of cutting tools. The face milling process of gray cast steel with silicon nitride tips reduces cost by up to 50%, doubles cutting speed and increases tool life.

    Electronic Industry.
    Silicon nitride has been used to make integrated circuits. This is done in order to electrically isolate the different components or for masking in bulk micromachining. Silicon nitride is an excellent passivation material for microchips. It has a much better diffusion barrier than silicon dioxide to both water molecules and sodiumions, which are the main causes of corrosion and instability within microelectronics. It can be used in an analog chip capacitor as a dielectric to separate polysilicon layer.

    Silicon nitride Price
    Price is affected by many things, such as the demand and supply in the market and industry trends. Economic activity. Unexpected events.
    For the most recent Silicon nitride price please send an inquiry to receive a quotation. (brad@ihpa.net)

    Silicon nitride Supplier
    Technology Co. Ltd. (), is a respected si3N4 manufacturer, and si3N4 provider. It has over twelve years' experience. All of our products are available for shipment worldwide.

    Feel free to email us to request high-quality SI3N4 Powder. (brad@ihpa.net)

    2023-03-10

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