Nano-magnesia is widely used in electronics, catalysis, ceramics, petroleum products, coatings and other fields.
1, flame retardant for chemical fiber and plastic industry;
2. Binders and additives used in high-temperature dehydrating agents, advanced ceramic materials, electronic industrial materials and chemical raw materials in the production of silicon steel sheets;
3. Radio industry high-frequency magnetic rod antenna, magnetic device filler, insulating material filler and various carriers;
4. Refractory fibers and refractories, magnesia-chrome bricks, heat resistant coatings fillers, high temperature and insulation resistant instruments, electricity, cables, optical materials and steelmaking;
5. Electrical insulating materials, manufacturing crucibles, melting furnaces, insulated conduits (tubular elements), electrode rods and electrode sheets.
In the textile field, with the increasing demand for high-performance flame retardant fibers, the synthesis of new high-performance flame retardant provides an ideal material for the development of functional fabrics. Nano-magnesia is usually used with sawdust and shavings to make lightweight, sound-proof, heat-insulating and fire-resistant fiberboard and cermet. Compared with some traditional phosphorus-containing or halogen-containing organic flame retardants, nano-magnesium oxide is nontoxic, odorless and small in addition, and is an ideal additive for developing flame retardant fibers. In addition, nano-magnesium oxide has strong cleaning and corrosion inhibition ability when used in fuel oil, and has a good application prospect in coatings.
Application of Nano-MgO in Ceramic Field
1. Preparation of dielectric materials for ceramic capacitors. The grain size of ceramics can be controlled in the range of 1000nm, with low dielectric loss and good material uniformity. It is suitable for producing multilayer ceramic capacitors with large capacity, high insulation resistance and ultra-thin dielectric layer (the thickness of dielectric layer is less than 10μm). The addition amount is 0.5-5%.
2. Nano ceramic powder, made of nano magnesium oxide, nano silicon dioxide, nano aluminum oxide, nano zinc oxide, etc. Contains 0.5-4.0% of nanometer magnesium oxide. The prepared nano-ceramic powder has many health-care functions, such as radiating far infrared rays, resisting bacteria, running water, purifying water, dissolving out trace elements beneficial to human health, releasing negative ions, improving the germination rate of plant seeds and so on. Can be widely used in various ceramic products, environmental protection, textile, drinking water treatment, tobacco and alcohol equipment and containers and other industries.
3. Nano-composite ceramic additives prepared by sintering nano-alumina and nano-titania can replace precious metal nickel to prepare heat-resistant steel. The addition of nano-magnesia is 5- 18%.
4. Nanocrystalline multiphase ceramics, using nano titanium dioxide, nano magnesium oxide, nano rare earth oxide and part of zirconia as additives, successfully increased the content of ZrO2 in amorphous to 10 ~ 30wt%, and obtained high zirconium Al2O3-SiO2-ZrO2 microcrystals and nanocrystalline multiphase ceramics with crystal phase content over 90%. The main crystal phases are mullite, tetragonal zirconia and tetragonal zirconia, and tetragonal zirconia grains are dispersed. The performance of the material prepared by the invention is superior to that of the same composition material prepared by the traditional method, and the microhardness is improved by 30%, the toughness is improved by 6%, and the strength is improved by 40%.
5. The glass-ceramic coating is made of nano magnesium oxide, nano silicon dioxide, nano boron oxide, nano aluminum oxide and nano cerium oxide, which can effectively improve the mechanical strength of the catalyst, including wear resistance, hardness, compressive strength and impact resistance. The reaction active center of the catalyst is improved, so that the activity of the catalyst is improved, the active components are saved, and the cost is reduced. It is mainly used in diesel engine and gasoline engine exhaust purification processor. The addition of nano-magnesia is 5- 18%.
6. Preparation of high toughness ceramic materials, using nano-magnesia and nano-yttria or rare earth metal oxides as composite stabilizers, and preparing partially stabilized zirconia ceramics with excellent mechanical properties and high temperature aging resistance through sintering and heat treatment. The ceramic material can be widely used as high-temperature engineering parts and advanced refractories.
7. Auxiliary component of reduction-resistant dielectric ceramic material, with the addition amount of 0.00 1- 10 mol%.
8. Ceramic gasket material for single-sided CO2 gas shielded welding, adding nano MgO 1 ~ 10 wt%.
9. Glass-ceramics, sintered glass-ceramics such as nano silicon dioxide, nano titanium dioxide, nano aluminum oxide and nano magnesium oxide. It can be made transparent by float glass method, especially suitable for thin film semiconductor substrates, and can be specifically applied to displays, solar cells and so on. Wherein that addition amount of nano magnesium oxide is 6-20%.