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  • Product Description

    WS2-E is a lubricant with a very high concentration of Tungsten nano-particles, Esters and Boron. Especially formulated to improve the extreme pressure (EP), anti-friction and anti-wear properties of standard compressor oil. It can be used as part of a fully-formulated ready to use compressor oil or as a top up after market product.

    It is a new generation surface-reconditioning lubricant based on mineral oil concentrate mixed with NanoMaterials' proprietary super strong tungsten disulfide (WS2) multilayered nano-fullerene particles. Suitable for a variety of applications including compressor oils, gear and hydraulic oils, and other lubricants requiring an extreme pressure, anti-friction, or anti-wear additive.

    WS2 was characterized by X-ray diffraction, Scanning Electron Microscopy and Transmission Electron Microscopy to obtain its physical and chemical properties. The morphology of lamellar WS2 was determined by SEM, while that of spherical WS2 was obtained by TEM. Both WS2 powders were lubricated in the laboratory, and the tribological properties of WS2 were investigated. The results showed that WS2 had a high wear resistance and was an excellent lubricant additive. Its tribological and viscosity-temperature properties were improved greatly compared with those of the sample oil without WS2.

    Mar 12
  • As industries around the world work to create more powerful lithium-ion batteries, graphite powder plays an increasingly important role. Both natural flake and synthetic graphite have a wide range of properties that make them useful for different applications.

    Graphite powder is the most common form of graphite and is available in many different granulations. The morphology of the particles determines their behavior under consolidation, which can impact anode performance.

    Artificial graphite is produced by heat treatment of a variety of materials, including petroleum coke, coal-tar pitch, oil, or other carbonaceous fuels. These materials can be calcined at temperatures approaching 3000degC to produce artificial graphite.

    Industrial synthetic graphite is produced as a by-product of electrodes used in heavy industry and manufacturing. Synthetic graphite is similar to natural graphite in that it offers high purity, excellent lubricity, and electrical conductivity.

    Commercial synthetic graphite is typically manufactured by a single supplier. It is a more closely matched sample than commercial natural graphite, which can be helpful for manufacturers who switch between the two to avoid mixing, agglomeration, and coating defects.

    Manufacturers can characterize the morphology of their graphite powder and optimize their processing and material handling by measuring particle shear values, which are sensitive to subtle differences in morphology. Using the TA Instruments Powder Rheology Accessory with the Discovery HR 30 rheometer, this information can be easily measured. By incorporating shear testing with other rheology measurements, such as viscosity, viscoelasticity, yield stress, and thixotropy, battery manufacturers can ensure their slurries will meet their requirements for optimum anode performance.

    Mar 11
  • Calcium nitride is an inorganic compound, with the chemical name Ca3N2, that is composed of calcium and nitrogen in a 3:2 ratio. It is a white, odorless powder with a melting point of 1,721degC and a boiling point of 2,450degC. It has a wide range of applications, from chemical synthesis to scientific research.

    A-calcium nitride is the most common form of this material. It is formed along with the oxide, CaO, when calcium burns in the air. The synthesis of this compound is known as the Henri de Moissan method, and it has been used since 1898.

    The crystalline structure of Ca3N2 is hexagonal. It has a density of 2.63, which is higher than that of boron nitride.

    It is stable at room temperature but will explode in the presence of shock or friction. This is an unusual phenomenon for nitride crystals.

    The molecule is polar because it has a permanent dipole-moment between the electropositive Ca and the electronegative N. This is because the electronegativity of the two atoms is more than 0.4D.

    This is because the shape of the molecule is bent, and there is no way to cancel out the dipole-moment. The molecule also has an asymmetric structure that makes it very difficult to sp2 bond with the N- atom.

    Besides, the molecule has some ionic character. This is because the N- atom has an extra electron that makes it a larger ion, and it can polarize the Ca2+ ion.

    Mar 09
  • Silicon dioxide powder is a chemical compound formed from two of the earth’s most abundant ingredients, silicon (Si) and oxygen (O2). Silica is found in the sand between your toes, as well as in the soil, plants, animals, and even in your body.

    The substance is used in many foods, supplements and cosmetics for its ability to keep various powdered ingredients from sticking together and clumping. It is also added to liquid ingredients in order to absorb moisture and improve flow qualities, thereby ensuring that the product flows smoothly through machinery.

    A method for preparing silicon oxide powder includes mixing the raw material powder mixture containing a silicon dioxide powder with a reducing powder, heating and maintaining the mixture at a temperature within a range of 1,100 to 1,600deg C., and preferably 1,200 to 1,500deg C., for thereby generating a SiO gas which is then fed into a deposition chamber through a feed conduit to deposit a silicon oxide powder.

    In operation, the mixture of silicon dioxide and reducing powder is heated in a muffle 11 that defines a reaction chamber therein to thereby generate a SiO gas which is then fed through a transfer conduit 30 into the deposition chamber for depositing a silicon oxide powder on a substrate 21. The resulting silicon oxide powder is then recovered and pulverized to a desired particle size in a suitable means such as a ball mill.

    While this process is relatively simple, it can be troublesome if the raw material powder mixture is heated too low, or if the furnace atmosphere is not maintained to ensure that the reactivity of the mixture is maximized. Alternatively, the mixture may be heated in a vacuum although the atmosphere of the furnace should be such that it maintains an air reactivity sufficient to facilitate complete reduction.

    Mar 09
  • Ca3n2 is a chemical compound made up of calcium and nitrogen in a 3:2 ratio. It is a red-brown, crystalline substance that can be used in a wide range of applications.

    It is a polar compound, which means that it has permanent dipole-moments between the two components of the molecule. This is because the asymmetric structure of the molecule makes it difficult to cancel out the dipole-moments by the same amount.

    The bond angle of Ca3N2 is around 1040. This is similar to the bond angle of water, which is about 1200.

    Calcium is an electropositive element that accepts electrons from its valence shell to form a cation. Nitride is an anionic form of nitrogen that accepts three extra electrons to complete its octet.

    Generally, when you see the chemical formulas of two elements, one is usually an electropositive element and the other is an anionic element. But you can sometimes see that some of the molecules have both ionic and non-ionic character.

    On electrolysis, Ca3N2 becomes a strong electrolyte because it breaks down into two different ions - Ca2+ and N-. The ions of Ca2+ are deposited in the anode while N- is deposited in the cathode.

    There is a permanent dipole-moment between the electropositive Ca and the electronegative N site of the molecule. This is why Ca3N2 is a polar compound.

    Mar 08
  • manganese oxide powder is used to colour and decolour glass, whiteware, enamels and pottery. It is also used as a component in battery cathode mixes and electronics.

    It is a black-brown inorganic compound, derived from the mineral pyrolusite. It is an important pigment and is used for many ceramic products such as bricks, pavers and roof tiles.

    Mn Oxides are a diverse group of metallo-oxide minerals that occur in a wide variety of geological settings, including soils and sediments. They have been used for centuries by ancient cultures as pigments and to clarify glass, and now find extensive industrial applications, particularly in the ferro manganese alloy refining industry.

    They are the major component of marine and fresh-water nodules, concretions, crusts, dendrites, and coatings on other mineral particles and rock surfaces. They also participate in a range of chemical reactions that affect groundwater and bulk soil composition.

    A very versatile inorganic pigment, MnO2 produces a variety of colours from blacks and browns to purples and blues. It has good firing stability in bricks and ceramics up to 1,280degC.

    At African Pegmatite, we supply and mill a broad range of manganese oxide and other metal oxide-based pigments for the colouring of bricks, tiles and ceramics. We combine the latest technology with decades of experience to provide our customers with a colourant product of choice.

    We stock manganese oxide powder in a -325 mesh powder size as well as granulations to 60 x 80 mesh. This is a cost effective, durable and high quality powder that can be easily used to colour clay based materials, resulting in beautiful natural shades of browns within the fabric of the material.

    Mar 06
  • The chemical formula of calcium nitride is Ca3N2. It is an inorganic compound that contains constituent elements Calcium (Ca) and Nitrogen (N).

    This chemical is often used as a corrosion inhibitor for concrete. It is mainly added to high-performance concretes and is usually used in large quantities to increase their durability.

    Moreover, it acts as a setting and hardening accelerator to speed up the development of strength in concrete. The dosage of this corrosion inhibitor depends on the client’s budget and a variety of factors such as cement type, water-to-cement ratio, cover of concrete to steel, ambient temperature and expected level of exposure to chlorides.

    Calcium nitride is a solid red-brown, crystalline solid made up of calcium and nitrogen. It is produced by heating fine fibrous metallic calcium purified by distillation to 450 in a pure N2 gas stream. The metal calcium undergoes crystal transformation at this temperature, so the lattice structure becomes loose and nitride is formed.

    Synthesis of calcium nitride is a common process in metal synthesis. The molten metallic calcium is sprayed into a reactor that contains a stream of nitrogen at a high temperature. The generated calcium nitride is collected in a collection unit and used for the preparation of further alloys.

    Calcium nitride is a versatile compound that has many scientific applications. It is used as a catalyst in the synthesis of organic compounds, as a reagent for the production of optical and electrical materials, and as a chemical analysis reagent. It also has a range of biochemical and physiological effects that are not fully understood.

    Mar 01
  • Silicon nitride powder is a white, high melting point solid that is chemically inert and thermodynamically stable. It is an important material for a wide range of applications that require excellent room temperature and high temperature mechanical properties, oxidation resistance and creep resistance.

    Known for its outstanding hardness and strength, si3n4 powder is an ideal material for mechanical applications that demand extreme strength with low thermal expansion and a long service life. Its unique combination of properties makes it a highly desirable ceramic for use in bearings, turbine blades and other structural components.

    SINX STX-100 TECHNICAL CERAMIC (Si3N4) POWDER is one of the most advanced and precise technical ceramics available today. It offers the best combination of mechanical, thermal, and electrical properties of any ceramic in its class.

    Dense and strong, it possesses the highest fracture toughness of any technological ceramic. It is also abrasion and corrosion resistant, making it a great choice for applications that involve heavy loads and harsh environments.

    Si3N4 is a popular passivation layer in the semiconductor industry because it has a lower diffusion resistance to water and alkali ions than silicon dioxide. It is also a very good dielectric and an excellent thermal conductor.

    The surface of Si3N4 is typically etched using a fluorine plasma. SF6-based, CF4-based and CHF3-based plasmas are commonly used. SF6-based plasmas have the advantage of a very fast etch rate, which is especially useful for anisotropic SiN surfaces.

    The slurry used for etching in SiN CMP must be highly selective to minimize oxide removal and to maintain good wafer scale nonuniformity. This requires a very low SiN removal rate and is ideally achieved through the use of a highly selective nitride slurry.

    Feb 25
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