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Monodisperse Nonporous Silica Microspheres
OxidesNanomaterials

Monodisperse Nonporous Silica Microspheres

By EPRUI Biotech Co. Ltd.

Nonporous monodisperse silica microspheres with a narrow particle size distribution are mainly used in the industry of chromatagraphic packings, light scattering,coating additives, LCD spacer and so on. Specification Model | APS | Matrix 2-001-0.05 | 50nm | SiO2 2-001-0.1 | 100nm | SiO2 2-001-0.12 | 120nm | SiO2 2-001-0.15 | 150nm | SiO2 2-001-0.2 | 200nm | SiO2 2-001-0.3 | 300nm | SiO2 2-001-0.4 | 400nm | SiO2 2-001-0.5 | 500nm | SiO2 2-001-0.6 | 600nm | SiO2 2-001-0.7 | 700nm | SiO2 2-001-0.8 | 800nm | SiO2 2-001-0.9 | 900nm | SiO2 2-001-1 | 1um | SiO2 2-001-3 | 3um | SiO2 2-001-4 | 4um | SiO2 2-001-5 | 5um | SiO2 2-001-6 | 6um | SiO2 2-001-7 | 7um | SiO2 2-001-8 | 8um | SiO2 2-001-9 | 9um | SiO2 2-001-10 | 10um | SiO2 2-001-20 | 20um | SiO2 2-001-30 | 30um | SiO2 2-001-40 | 40um | SiO2 2-001-50 | 50um | SiO2 2-001-100 | 100um | SiO2 Customization is accepted if need other particle size or carrying with other chemical groups.

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Nano SiO2 (Silica Nanoparticles)

Nano SiO2 has the features of small particle size, narrow particle size distribution, porous, large surface area and owns a large number of hydroxyl groups and unsaturated residual bonds on its surface and shows high reflectivity to long wave,visible light and ultraviolet ray. Tested by BET method,silica nanoparticle has large specific surface area.Through infrared spectroscopy method, SiO2 nanoparticle exists a large number of hydroxyl groups and unsaturated residual bonds on its surface, and forms the deviation from the steady state of the silicon oxide structure. According to the Cary-5E spectrophotometer test, silica dioxide nanoparticle shows high reflectivity to long wave,visible light and ultraviolet ray. By using omnisorp100CX surface area and porosity analyzer, P-type nano-silica surface contains a number of nano-porous with the pore rate of 0.611ml /g. Item | Product Name | APS | Purity | Morphology | Color EPRUI-SP15 | Nano SiO2 | 15nm | 99.5%+ | Amorphous | white EPRUI-SP30 | Nano SiO2 | 30nm | 99.5%+ | Amorphous | white 1. Used in paint: on the basis of the original formulation of latex water paint, add SiO2 nanopowder which made up of 0.3-1% of the total weight (fully dispersed). By adding SiO2 nanoparticles, the performance of suspension stability, thixotropy of the coating, the strength of combination between substrate and coating and the degree of finish etc. has improved greatly. Also, the drying time is significantly shorten, the test time to artificially accelerate UV aging is multiplied, the scrub resistance increased from thousands of times to ten thousands of times and the stain resistance of the coating also improved significantly. 2. Used in plastic: Silica nanoparticles is fully dispersed in polypropylene (PP), polyvinylchloride (PVC) plastic raw materials and can significantly improve strength, toughness, wear resistance and aging resistance of plastics. For example, nano modified PP, its performance in water absorption, insulation resistance, compressive residual deformation, flexural strength and other indicators all meet or exceed the engineering plastic nylon 6, and its weathering is more than doubled in some areas, and it can be an alternative to nylon 6 in some areas. 3. Used in color rubber: By adding a small amount of nano sio2(instead of carbon black) in the solution polymerized styrene-butadiene and other rubber as reinforcing agents and anti-aging agent, the toughness, strength, elongation, bending and anti-aging performance of the color rubber products meet or exceed the EPDM. 4. Used in modified magnetic materials: Add nano silicon oxide based composite powder into iron coke powder, the product performance reaches the highest level of the existing products according to the test. For example, the remanence flux density is more than 4100 Gs, inner intrinsic coercivity is greater than 3000 Oe and the magnetic energy product is greater than 4 mGOe, and the material production costs are significantly reduced at the same time. 5. Used in cement concret Traditional cement based material has low strength. By adding 2-5% silica nanoparticles instead of ordinary concrete materials, the performance of concrete will enhance.With special nano treatment,the surface area of nano silica can be larger, easier to cement and hydration in the formation of chemical bonds to CSH gel. Silica nanoparticles has a special network structure, On the basis of the original network structure of cement slurry, a new network is established to form a three-dimensional network structure, which can greatly improve the physical and mechanical properties and durability of cement paste. Therefore,nano SiO2 can be applied to high strength cement-based pavement materials. In addition, nano silica can be widely used in the field of Tao (boring), porcelain, plaster, batteries, paints, adhesives, cosmetics, glass, steel, chemical fiber, plexiglass, and environmental protection to upgrade the quality.

Aluminium Nitride Nanopowder

Aluminium Nitride Nanopowder possesses high purity, narrow range particle size distribution, larger specific surface area, lower bulk density and better shaping injection molding properties. Aluminium nitride nano powder is used in composite, and it has a good match with the semiconductor silicon and its good interface compatibility improves the mechanical properties and thermal conductivity of composite material. Item: Aluminium Nitride Nanopowder; Purity: 99%; APS: 50nm; Color: Grey; Bulk Density: 0.05g/cm3; Crystallographic Form: Hexagonal structure; oxygen content: 0.80%; Making method: Plasma CVD; SSA: 105m2/g Aluminum Nitride nanopowder used to improve the performance of epoxy resin In Aluminum nitride nanopowder and epoxy resin system, when the content of Aluminum nitride nanoparticle reaches to 1%~5%, glass-transition temperature increases and module of elasticity reaches the maximum value. The adding of Aluminum nitride nanopowder to epoxy resin compound materials is completely different from the adding of Aluminum nitirde micro grain in structure. It is usually added as a kind of reinforcing agent and mainly distributed between the chains of polymer material. For insufficient coordination on the surface and large specific surface area, it shows very strong activity. Meanwhile, part of Aluminum nitride nanoparticles grains are distributed in the spacing of polymer chain. Comparing to Aluminum nitride micro grain, Aluminum nitride nanopowder possesses very good fluidity and can largely improve the intensity, tenacity and tractility of epoxy resin. The silica gel compounded with Aluminum nitride nanoparticles, which has super thermal conductivity, gives very excellent thermal conductivity, electrical insulation, wider working temperature of electrical insulation (-60°C~-200°C), lower thickness and good operation performance, and can be widely used in the thermal transmission medium of electronic component to improve working efficiency, such as CPU radiator filler, high-power audion, controllable Silicon components, diode, thermal transmission medium in the seam and so on. Aluminum Nitride Nanopowder powder can largely improve the thermal conductivity of plastic. By adding Aluminum nitride nanoparticles to plastic according to the proportion of 5%~10% in mass, we can increase the thermal conductivity of plastic from 0.3W/(m.k) to 0.5W/(m.k), 16 times more. Compared with the heat conduction stuffing (alumina or magnesia) in the market, it can improve the mechanical properties of products with smaller amount. At present, related manufacturers have purchased Aluminum Nitride Nanopowder powders in mass and the new-type nano heat conduction plastic will be launched to market. Aluminum Nitride Nanopowder powder works very well in silicon dioxide and tends to disperse in rubber. Under the premise of making no difference to the mechanical performance of rubber, (experiments proved that it could improve the mechanical performance of rubber), it can largely improve the heat conductivity of rubber and will not lower down the viscosity like other oxides during adding process, and only very small amount is required. It has been widely applied to military, aviation and information engineering. Damp reunion will affect its dispersion performance and using effects, therefore, this product should be sealed in vacuum and stored in cool and dry room and it should not be exposure to air. In addition, the product should be avoided under stress.

Silicon Nitride Nanoparticles

Silicon nitride nanoparticle possesses high purity, narrow range particle size distribution, and larger specific surface area; The hardness of this product is about 9 to 9.5, Knoop hardness is about 2200, micro hardness is 32630Mpa, melting point is 1900 °C (under pressure) and thermal conductivity rate is 16.7W / (m · K). High surface activity, low bulk density, UV reflectivity is more than 95% and absorption rate of infrared band is above 97% It does not dissolve in water, soluble in hydrofluoric acid; Nano silicon nitride modulus: 28420 ~ 46060Mpa; bending strength: 147MPa; compressive strength: 490MPa (reaction sintering). It is an important structural ceramic materials and a super-hard material. The product itself possesses lubrication which can be used in lubricants, wear resistance, corrosion resistance, anti-oxidation in high temperature. And it can withstand the hot and cold shock. If it is heated to above 1000 °C in the air, and then rapidly cooled and followed by rapidly heated again, it will not fracture. Si3N4 nanoparticles can greatly improve the comprehensive performance of the composite material if added because of the minor dispersed phase formed in the composite material. The properties of high hardness, and low coefficient of sliding friction make nano Si3N4 good material for ceramic composite plating on metal surface. And its features of wear-resistance and solvent resistance can be applied into coating. In addition, the ceramic-forming temperature of silicon nitride ceramic devices is low. Silicon nitride ceramic devices have good dimensional stability and high mechanical strength. Item | Purity | APS | SSA | Color | Crystal Formation | Morphology | Bulk Density Si3N4 Nanoparticles | 99.9% | 20nm | 93m2/g | White | amorphous | spherical | 0.09g /cm3 Si3N4 Nanoparticles | 99.9% | 800nm | 65m2/g | Grey White | Alpha | face-centered cubic | 0.23g /cm3 Si3N4 Nanoparticles | 99.9% | 800nm | 49m2/g | Grey Light Green | Alpha | face-centered cubic | 0.69g /cm3 It is mainly used for: - manufacturing structure device: such as metallurgy, chemical industry, machinery, aviation, aerospace and energy industries to use the ball and roller bearing, sliding bearing, sleeve, valve, and a wear-resistant, high temperature, corrosion-resistant structural components required - Surface treatment of metal and other materials: such as molds, cutting tools, turbine blades, turbine rotor and the cylinder wall coatings - Composite materials: such as metals, ceramics and graphite composites, rubber, plastics, coatings, adhesives and other polymer-based composites - The colorless, transparent self-lubricating wear-resistant nano-particle films for mobile phones, cars and other advanced surface protection - Ball bearings - Ball valves and parts - Corrosion resistant turbine - Cutting tools Grinding wheels - Insulating parts - Spray nozzles (for rockets) - Spray pipe (for missiles) - Strengthening materials (for Al etc) - Wear parts - Special textile to absorb infrared ways Damp reunion will affect its dispersion performance and using effects, therefore, this product should be sealed in vacuum and stored in cool and dry room and it should not be exposure to air. In addition, the product should be avoided under stress.

Iron Nanoparticles

Iron nanoparticle has large specific surface area with a strong tunneling effect and small size of the border effect, and it also has the general properties of ordinary iron. Therefore, iron nanoparticle is widely used in radar absorbers, magnetic recording devices, heat resistant alloys, powder metallurgy, injection molding, a variety of additives, binder carbide, electronics, metal ceramic, chemical catalysts, high grade paint and other areas. Iron nano particle has uniform particle size, narrow particle size distribution, high purity and low contents of carbon, nitrogen, oxygen, sulfur, phosphorus and other harmful elements. It also has good fluidity, good antioxidant capacity and low sintering temperature. Due to large surface area and small particle size ( < 100 nm ), it will result in agglomeration and oxidation or even combustion and explosion during the preparation process of iron nanoparticles. Item: Iron Nanoparticles Purity: 99.90% APS: 30-100nm SSA: 6.5-13m2/g Color: Black Morphology: Spherical Bulk Density: 0.35-0.48 g/cm3 - Absorbing materials: metal nanopowder has special function of electromagnetic wave absorption. Iron, cobalt, zinc oxide powder and carbon-coated metal powder can be used in military as an invisible material with good performance of millimeter wave. Can be used as infrared stealth materials and structures invisible materials as well as mobile phone radiation shielding materials - Magnetic Media: The high saturation magnetization and permeability rate of nano iron make it good magnetic media which can be used as bonding structure of fine head - Magnetic recording materials with high performance: With the advantage of straightening coercivity, saturation magnetization, high specific saturation magnetization and good oxidation resistance, etc., iron nanoparticle can greatly improve the performance of the tape and large-capacity hard & soft disk - The magnetic fluid: magnetic fluid made of iron, cobalt, nickel and its alloy powder has excellent performance and can be widely used in seal damping, medical equipment, sound control, light display Damp reunion will affect its dispersion performance and using effects, therefore, this product should be sealed in vacuum and stored in cool and dry room and it should not be exposure to air. In addition, the Fe Nanopowder should be avoided under stress. - Metal nanopowder should be gently placed and avoided violent vibration and friction. - Metal nanopowder should be prevented from moisture, heat, impact and sunlight. - The user must be a professional (This person must know how to use this product.)