Knowledge about nano materials | Rboschco


  • Inconel 718 is a nickel and chromium alloy used in aerospace and industrial applications, including jet engines. It is extremely strong and has high corrosion resistance. It can be used at temperatures up to 700°C, making it an ideal material for use in turbines and other engine parts.

    3D printing technology uses a laser beam to fuse powders of metals together into a three-dimensional object. This process is often referred to as additive layer manufacturing or direct metal laser sintering (DMLS).

    In addition to being a great way to build complex shapes, 3d printing can also be used to reduce the amount of machining needed to produce a part. This is important since it can help manufacturers create lighter, more robust products that require less maintenance.

    For example, a team at the University of California, San Diego created a 3D printed rocket engine using DMLS technology. The engine, which was printed with liquid oxygen and kerosene as propellants, produced 750 lbf of thrust.

    Inconel 718 is a heat-resistant, highly ductile alloy that can be processed into a variety of components. It is a good choice for manufacturing high-stress, corrosive environments, as it can retain its strength at temperatures up to 700°C.

    It is a highly resistant to oxidation and has excellent machinability, which makes it an ideal material for 3d printing. In addition to being corrosion-resistant, it has high tensile, yield, and creep-rupture properties.

    Inconel 718 can be 3D printed with a variety of technologies, including DMLS, which uses a laser to melt powder material into a 3D model. It can also be 3D printed with binder jetting, which uses a spray gun to form an object from the powder. Alternatively, it can be 3D printed with direct energy deposition, which uses a laser to heat the powder and bind it together into a final part.

    Mar 15
  • When it comes to writing the formula of an ionic compound, there are two rules to remember. First, always write the positive atoms in order. Second, make sure that the negative atoms are written last.

    Calcium nitride is an inorganic compound with the chemical formula Ca3N2. It consists of a solid red-brown powder made up of calcium and nitrogen. It is a reactive nitride ion and can be used to create various different materials.

    Synthesis of calcium nitride (Ca3N2) is accomplished by heating metallic calcium in the presence of nitrogen. This process has been known since the works of Henri de Moissan in 1898, and is a useful technique for manufacturing single crystals.

    During the synthesis of calcium nitride, metallic calcium is heated to 450deg C in a stream of pure nitrogen and then nitrided after 3-4 hours. The prepared calcium nitride is black at 350degC, milky white at 350 to 1150degC, and golden yellow above 1150degC.

    This nitride is easily identified because it reacts with water to form calcium hydroxide and ammonia. It is a common material used in the production of light-emitting diode phosphors.

    In addition to its use in the synthesis of various chemical compounds, calcium nitride is also used for laboratory experiments. It is inexpensive and easy to obtain, making it an excellent choice for scientific research.

    Synthesis of calcium nitride is a practical process that can be performed using a device such as that represented in FIG. 4. It comprises a tank 19 containing a zinc-calcium alloy in mass proportion of one third zinc for two thirds calcium, the alloy being pressurized by argon coming from a second tank 19. The molten alloy is sprayed in the form of droplets into the reactor 6 by an injector (5) and is collected in a collector unit 7 (FIG. 2) located in the lower part of the reactor.

    Mar 14
  • The full name of Ca3N2 is calcium nitride, and its chemical formula is Ca3N2. It has a reddish-brown crystalline solid. It is a highly reactive reagent, and it can be used to obtain nitride ions from other compounds.

    It is a reducing agent, desiccant, and chemical analysis reagent. It is also a flammable solid that can be dangerous when exposed to sparks, heat, or open flames.

    It is made by heating distilled fibrous metallic calcium to 450 degrees in a purified nitrogen stream. After 3 to 4 hours, the calcium nitride is obtained.

    It can be reduced with zirconium, niobium, hafnium, and other metal oxides to form a corresponding powder. It is a common reducing agent and is a widely used powder metallurgy reagent.

    This nitride is formed by combining two electrons from the outermost orbit of the calcium atom with three extra electrons from the nitrogen atom. The resulting nitride ion is called N3-.

    It can be produced by heating calcium nitride with hydrogen at temperatures above 350 degC. It is a corrosive and toxic substance, and repeated contact or overexposure can lead to eye damage and skin burns. It can also react with water to form calcium hydroxide and ammonia. It is a good reagent for research, and it is also useful in the chemical industry. It can be ordered in bulk and shipped as ordinary cargo. is a professional supplier of calcium nitride, and we can offer you the best price for high-quality products.

    Mar 13
  • African Pegmatite is a leading supplier, producer and miller of manganese oxide powder to the ceramic and brick industries. A range of high quality products are available, milled to customer specific requirements and backed up by decades of experience in the industry.

    Typical Applications

    For many years, manganese oxide has been used as a pigment in ceramics and brick manufacture and is widely recognised and accepted as the optimum colouring material for this application. It is also used as a filler in clay based materials.

    The oxidation state of manganese varies from +2 to +7 and is present in six different oxides. Some oxides are amorphous while others are black orthorhombic crystals.

    Some Mn oxide minerals can be characterized by a number of analytical techniques such as transmission electron microscopy and powder x-ray diffraction. This has led to a better understanding of Mn oxide mineral structures and their properties.

    In addition to a range of analytical techniques, there are a number of unique properties of Mn oxide that make it an attractive material for a wide variety of applications. These include:

    Chemical Reactivity

    One of the most important properties of manganese oxide is its ability to act as a catalyst in certain reactions, particularly those related to oxidation and reduction. This property is useful for the synthesis of many organic chemicals including aromatics, amines and triols.


    A number of biosensors have been developed based on manganese oxide, most notably the electrochemical turn-on fluorescent sensor for glucose detection. Another potential use of manganese oxide is as a component in solid state lithium ion batteries.

    Mar 11
  • sodium stearate chemical formula

    Sodium stearate is the sodium salt of stearic acid and is used in soaps, deodorants, rubbers, latex paints, inks and as a component of some food additives. It is a mild irritant to the skin and eyes, but is not toxic or harmful to the environment.

    The chemical formula of stearic acid is composed of 18 carbons in a ring structure with both polar and non-polar parts. The polar end is a carboxylate and is hydrophilic, while the long non-polar hydrocarbon chain is hydrophobic.

    It is a natural ingredient and can be derived from vegetable triglycerides obtained from coconut and palm oils or animal triglycerides such as lard and tallow. It can be halal, kosher pareve or gluten free depending on the source.

    In addition to its role in soaps, sodium stearate is also a surfactant, an ingredient that helps water and oil mix together better. It is widely used in cosmetics and personal care products as an emulsifier and thickener.

    Sodium Stearate is a surfactant with both hydrophobic and hydrophilic parts that help emulsify and disperse oils and fats into a thin layer, and make them easier to mix. This enables it to be used in soaps, deodorants and air fresheners.

    It can also be made in the laboratory by neutralizing stearic acid with sodium hydroxide. It is slightly soluble in water and in ethanol (96 per cent).

    Sodium stearate is one of the most common and useful carboxylic surfactants and is obtained by saponification of many types of animal fats and oils. It is found in many soaps, solid deodorants and in rubbers and in some types of paints, inks and accelerators.

    Mar 08
  • cobalt chromium molybdenum is an excellent choice for many surgical implant applications because of its exceptional strength, toughness and corrosion resistance. However, it is often considered a difficult material to machine because of its high hardness and low thermal conductivity.

    It is a popular material for jewelry because it resembles precious metals like platinum or gold. It also has a high white color and shine that gives it a beautiful look, making it appealing to customers.

    Despite these properties, it is still considered as a difficult material to work with because of its low machinability and many problems during machining. The machinability of cobalt chromium molybdenum alloys can be improved by minimizing the cutting speed, feed rate and depth of cut along with using a sharp cutting edge tool during machining.

    To improve the mechanical properties of wrought or forged cobalt chromium alloys, an activation composition containing at least 25% (v/v) hydrogen peroxide and at least 37% (fuming hydrochloric acid) is recommended for reactivity testing of wrought and forged cobalt chromium metals. The resulting metallurgical activation improves the oxidation behavior, reducing oxygen vacancies, improving mechanical properties and increasing the surface area of the work-piece.

    The implantation of low friction ionic liquids containing the anionic amino acid phenylalanine is demonstrated to enhance the corrosion and wear performance of titanium (Ti6Al4V) and cobalt chromium molybdenum (Co28Cr6Mo) alloys. The ionic liquids stabilize coatings and mitigate the effects of chemical induced metal ion release on the surfaces of the alloys.

    Mar 07
  • Silicon nitride powder is a grey powder (Moh's hardness 8.5) which is an important structural ceramic material. It is super-hard, inherently lubricious, and resistant to wear and tear. It is also an atomic crystal; it resists oxidation at high temperatures and has excellent thermal shock resistance.

    Production of si3n4 powder is accomplished by one of three methods: direct nitridation, the reaction of SiCl4 and NH3, or carbothermal reduction of SiO2. These are versatile, inexpensive techniques that produce Si3N4 in powder form with high hardness, melting point, and chemical resistance.

    A low-temperature nitriding process, using diluted HF at 1400 to 1500 deg C, produces Si3N4 in powder form with high purity and strength. This nitriding process is the most common method used for producing silicon nitride in industrial quantities.

    The highest-temperature nitriding process, which produces a highly crystalline and pure form of Si3N4 in a single step, uses hot gas at 2000 to 3000 deg C. This nitriding process has been used to develop materials for aerospace applications, including components for satellites and specialized fuel cells.

    It has also been used in manufacturing mechanical components such as bearings, turbine blades, mechanical seal rings and permanent molds. The lubricity of silicon nitride helps reduce friction. Moreover, it is highly resistant to wear and tear and can be molded with precision into various shapes. It is an important choice for many different applications that need superior toughness and strength.

    Mar 06
  • NiO powder is used in nickel alloys, salts, catalysts, fuel cells and other chemicals as well as ceramic glazes, frits and colorants. Typical impurities include cobalt, copper, iron and sulfur at levels of 1% or less.

    Occupational and environmental exposures to green NiO (NiO-g) have been reported in the USA. About 4000 tons of chemical grade NiO are produced annually.

    In a 2-year National Toxicology Program study in F344/N rats, some carcinogenicity was reported with chronic inflammation without fibrosis. The most commonly affected tissues were lungs, bronchial lymph nodes and thymus. Changes in these organs were similar in animals exposed to low-level aerosol exposures to NiO-g.

    High-resolution XPS spectroscopy confirmed the presence of crystalline NiO with main peaks at 2.41, 2.09, 1.48, 1.26 and 1.21 A (d) values and multiplets for Ni 2p and O 1s. In addition, XRD showed a thin surface oxide for NiO-g that is covered by a defect-rich Ni2O3 or Ni(OH)2 surface oxide.

    Release data for the exposed NiO-g powder were determined in synthetic fluids with relevance for the two main exposure routes of nickel toxicity including artificial sweat (ASW) and artificial lysosomal fluid (ALF). After exposure, the released nickel amounts from the Ni metal powders dissolved significantly faster and were lower in ALF than in ASW, indicating that the released nickel was mainly a function of chemical dissolution rather than electrochemical or complexing processes.

    Detailed particle and surface oxide characterization, combined with kinetics analysis of the release of nickel from the nickel metal powders compared to a nickel oxide bulk powder, is an important step towards understanding the behavior of micron-sized nickel metal powders. This investigation is also a valuable tool for determining the reactivity of bulk powders as a means of improving their safety.

    Mar 05
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