silicon dioxide nanoparticles – Silver Nanoparticles Antimicrobial,Copper Oxide Nanoparticles,Gold Nanopowder

March 7, 2016

Nano Silica Coating, Nano Titanium Dioxide Coating

Part of the bus use a transparent glass wall insulating glass coating, which is composed of nanoscale semiconductor material that allows interior cool. Such coatings and high-tech sound, that what constitutes nano-coating paint it? In general, the nano-coating must meet two conditions: First, the coating has at least one phase of the particle size range of 1-100 nanometers in diameter, and secondly, to make the presence of nano-coatings have significantly improved the performance or with new features.

Nano-silica coating: silica architectural coatings non-hierarchical, thixotropic, anti-sagging, good construction performance, and to a large extent improved the stain resistance, excellent self-cleaning properties and adhesion.Capable of forming a network structure of nano silica coating when dry, the coating can improve the degree of finish and aging vehicles, ships and vessels.

Nano-titanium dioxide coating: titanium dioxide paint architectural coatings can improve weatherproofing to a new level.The use of nano-titanium dioxide photocatalytic oxidation technology made the atmosphere purification paint, air purification effect of NO is good, but can also degrade other atmospheric pollutants such as halogenated hydrocarbons, sulfur compounds, aldehydes, polycyclic aromatic hydrocarbons .Nano-titanium dioxide photocatalytic composite application process is simple and low cost.

Nano calcium titanate coating: calcium titanate is an excellent filler and a white filler, with cheap, abundant resources, good color, high-grade characteristics.Research shows that nano calcium carbonate-filled paint, its flexibility, hardness, leveling and gloss have a more substantial increase.

Silver nano-titanium dioxide coating:Titanium dioxide under ultraviolet light is weak antibacterial effect is weak, you can indicate precious metal deposition to be modified in order to improve the photocatalytic bactericidal activity, and has excellent bactericidal properties of silver itself, will combine the two, makes titanium dioxide antibacterial performance pole greatly improved.By thermal deposition on the surface of titanium dioxide load a certain amount of silver can improve the photocatalytic antibacterial properties of the particles

Related article: Ceramic Additives Aluminum Oxide Nanopowders

January 13, 2016January 13, 2016

Silicon Nanoparticle Used In The Paint　

Nano-silicon particles have a larger surface area, colorless and transparent; a lower viscosity, penetration ability, good dispersion properties. Silicon nano silica particles are nanoscale, its size is less than the visible light wave length, do not form the reflection and refraction phenomena visible, it will not make the paint surface matting.

Uses of silicon dioxide nanoparticles
1. reaction with organic matter, as silicone polymer raw material
2. Preparation of metallic silicon by purifying polysilicon.
3. The metal surface treatment.
4. Alternative nano carbon or graphite as lithium battery cathode materials, lithium battery capacity greatly improved.
5. The semiconductor microelectronic packaging materials.
6. automotive beauty products: increase gloss, fill minor cracks surface

Perfect application of nanotechnology in paint products, to include interior, exterior, antibacterial latex paint, primer and dozens of varieties. Product performance has been greatly improved: expose nanoscale some amphiphobic, sticky water, non-stick oil, resistant to wash up on a million times; superior adhesion and flexibility, not hollowing, can not afford to skin, not cracking; nanomaterials ultraviolet shielding function, greatly improving the resistance to aging, long-term does not fade, the service life of ten years; unique optical catalytic self-cleaning function, anti-mildew sterilization, clean air. The coating applications:

1, exterior paint if users need to improve the coating of anti-aging, scrub, anti-staining properties, for high-grade paint, recommendations, or used in combination alone. The former dosage is 1-5%, which increase the amount of nano-titanium dioxide 0.5-3% 0.5-2% nanometer silicon, for middle and low coatings, nanomaterials dosage is 1-2%, mainly with Nano silicon, no or little use of nano titanium dioxide. In general, the amount of material costs as allowable range Nei Nami high percentage of costs under strict control, it is recommended customers through testing to determine the optimum amount of nano-materials added to make it has a very good price.

2, the interior wall paint if users have higher indoor air quality requirements, the available nano-titanium dioxide powder or rice anion to purify the air with antibacterial nano materials or nano-zinc oxide to enhance the antibacterial, antifungal properties. Users can be improved through the use of nano-titanium dioxide and nano-silica-bound leveling, anti-staining properties and thickening properties of the coating, the recommended dosage (1-3%), alone, composite can, using negative ions and anatase nano titanium dioxide coating can improve the ability to purify the air.

3, a special paint
1.antistatic coating, antistatic requirements for rooms and other high places;
2.wear-resistant coatings, nano-zirconia, cobalt oxide nanoparticles can significantly improve the coating hardness and wear resistance;
3.corrosion-resistant coatings, nano silica, nano-titanium dioxide, nano-zinc oxide, alone or in combination can improve the corrosion resistance of the coating, particularly against sea water corrosion;
4.fire retardant paint, if there are requirements for fire performance coatings, nano-magnesium oxide is recommended to add an amount of 0.5-5%, respectively.

November 6, 2015

Discovery of Silicon Carbide

Silicon carbide (SiC) with quartz sand, petroleum coke (or coal), wood chips (the production of green silicon carbide need to add salt) and other raw materials by high temperature resistance furnace smelting. Silicon carbide also exists in nature, rare mineral moissanite. Silicon carbide, also known as Moissanite. In contemporary C, N, B and other high-tech non-oxide refractory materials, and silicon carbide is the most widely used, most economical, can be called emery or refractory sand. China’s industrial production of silicon carbide is divided into two kinds of black silicon carbide, and green silicon carbide, are hexagonal crystals, a specific gravity of 3.20 – 3.25, the hardness of 2840 ~ 3320kg / mm2.

Silicon carbide was accidentally invented by Edward G. Acheson different field in 1891, while trying to manufacture artificial diamonds. A mixture of fine sand and charcoal brick is about the inner conductor resistance furnace carbon. Current passing through the furnace to bring the carbon in the coke and silica sand, a chemical reaction to form the compound of SiC and carbon monoxide gas. In the end you have a green and black crystal like components, these components after crushing and grinding into various sizes each use. The crystals were deeper, smaller purity. Some natural silicon carbide was found in Arizona Grand Canyon Diablo meteorite. Most of the sales to the worldwide silicon carbide is synthetic.

Acheson patented the method of making silicon carbide in 1893. Silicon carbide is also called carborundum because Acheson was trying to dissolve carbon in molten corundum (alumina) when this material was discovered,and now silicon dioxide nanoparticles is popular very much. It was first put to use as an abrasive and later used in electronic applications. It was also used as a detector in radios in 20th century. In 1907 LED was first produced by Henry Joseph Round by applying high voltage to silicon carbide crystals.

This chemical has low density, high strength, low thermal expansion, high thermal conductivity, high hardness, excellent thermal shock resistance, and fantastic chemical inertness. Due to its properties it is widely used in suction box covers, seals, bearings, ball valve parts, hot gas flow liners, heat exchangers, semiconductor process equipment and fixed and moving turbine components.

In today’s world it is commonly used in abrasives such as grinding, water-jet cutting, sandblasting etc. Particles of the silicon carbide are used in sandpaper. It is also found in various automobile parts such as brake disks due to its resistance to extreme temperatures. The compound is also used in the mirror of the astronomical telescope because of its rigidity and hardness and thermal conductivity. It is also used to melt glass and non-ferrous metals, production of ceramics, float glass production, steel production, as catalyst support, graphene production etc.

It is also used as a gemstone in jewelery and is referred to as “moissanite” and is similar to diamond in its hardness with a Mohs hardness rating of 9. It is much more resistant to heat and lighter than diamonds and hence has more shine, sharper facets. It has also become a very popular diamond substitute.

July 23, 2015

Information of Silicon Dioxide Nanoparticles

Since nanomaterials are a heterogeneous group of substances used in various applications, risk assessment needs to be done on a case-by-case basis. Here the authors assess the risk (hazard and exposure) of a glass cleaner with synthetic amorphous silicon dioxide (SAS) nanoparticles during production and consumer use (spray application). As the colloidal material used is similar to previously investigated SAS, the hazard profile was considered to be comparable. Overall, SAS has a low toxicity. Worker exposure was analysed to be well controlled. The particle size distribution indicated that the aerosol droplets were in a size range not expected to reach the alveoli. Predictive modelling was used to approximate external exposure concentrations. Consumer and environmental exposure were estimated conservatively and were not of concern. It was concluded based on the available weight-of-evidence that the production and application of the glass cleaner is safe for humans and the environment under intended use conditions.

Silicon Oxide(SiO2) Nanopowder, silicon dioxide nanoparticles or nanodots are high surface area particles. Nanoscale Silicon Oxide Nanoparticles or Silica Particles are typically 5 – 100 nanometers (nm) with specific surface area (SSA) in the 25 – 50 m 2 /g range. Nano Silicon Oxide Particles are also available in Ultra high purity , high purity, coated, hydrophilic, lipophilic and dispersed forms. They are also available as a nanofluid through the AE Nanofluid production group. Nanofluids are generally defined as suspended nanoparticles in solution either using surfactant or surface charge technology. Nanofluid dispersion and coating selection technical guidance is also available. Other nanostructures include nanorods, nanowhiskers, nanohorns, nanopyramids and other nanocomposites. Surface functionalized nanoparticles allow for the particles to be preferentially adsorbed at the surface interface using chemically bound polymers.

Development research is underway in Nano Electronics and Photonics materials, such as MEMS and NEMS, Bio Nano Materials, such as Biomarkers, Bio Diagnostics & Bio Sensors, and Related Nano Materials, for use in Polymers, Textiles, Fuel Cell Layers, Composites and Solar Energy materials. Nanopowders are analyzed for chemical composition by ICP, particle size distribution (PSD) by laser diffraction, and for Specific Surface Area (SSA) by BET multi-point correlation techniques. Novel nanotechnology applications also include Quantum Dots. High surface areas can also be achieved using solutions and using thin film by sputtering targets and evaporation technology using pellets, rod and foil.. Research into applications for Silicon Oxide nanocrystals includes use as a dielectric coating, in solar cell applications, as a high temperature insulator, as a gas sensor and for use in other coatings, plastics, polymers and wire and further research for their potential electrical, optical, imaging, and other properties Silicon Oxide Nano Particles are generally immediately available in most volumes. Additional technical, research and safety (MSDS) information is available.

Silicon (Si) atomic and molecular weight, atomic number and elemental symbolSilicon (atomic symbol: Si, atomic number: 14) is a Block P, Group 14, Period 3 element with an atomic weight of 28.085. Silicon Bohr MoleculeThe number of electrons in each of Silicon’s shells is 2, 8, 4 and its electron configuration is [Ne] 3s2 3p2. The silicon atom has a radius of 111 pm and a Van der Waals radius of 210 pm. Silicon was discovered and first isolated by Jöns Jacob Berzelius in 1823. Silicon makes up 25.7% of the earth’s crust, by weight, and is the second most abundant element, exceeded only by oxygen. The metalloid is rarely found in pure crystal form and is usually produced from the iron-silicon alloy ferrosilicon. Elemental Silicon Silica (or silicon dioxide), as sand, is a principal ingredient of glass, one of the most inexpensive of materials with excellent mechanical, optical, thermal, and electrical properties. Ultra high purity silicon can be doped with boron, gallium, phosphorus, or arsenic to produce silicon for use in transistors, solar cells, rectifiers, and other solid-state devices which are used extensively in the electronics industry.The name Silicon originates from the Latin word silex which means flint or hard stone.