The salient features and practical applications of nano aluminium nitride
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Author : TRUNNANO
Update time : 2020-12-17 09:38:30
Nano aluminum nitride (AlN)is prepared by aerosol ablation method, with high purity, small particle size, large specific surface area and high surface activity. The powder treated by surface modification will not undergo a hydrolysis reaction and has extremely low oxygen content. (<0.01%), the effect of insulation and thermal conductivity is very obvious. Used in polymer resins, the viscosity is not obvious, and it is currently the best high thermal conductivity insulating filler.
The features of nano aluminum nitride
Nano-aluminum nitride is a diamond-like nitride, which can be stabilized up to 2200℃, has high room temperature strength, and its strength decreases slowly with the rise of temperature; nano-aluminum nitride powder has good thermal conductivity, small thermal expansion coefficient, and thermal conductivity The theoretical value of the rate is 340w/mk, which is similar to copper, and at the same time highly insulated. The resistivity is 1015, and it can withstand a high temperature of 1400 degrees. It can greatly improve the thermal conductivity of plastic and silicone rubber. It is a good thermal shock material.
Strong resistance to molten metal corrosion, it is an ideal crucible material for melting and casting pure iron, aluminum or aluminum alloy; nano aluminum nitride has excellent electrical insulation and good dielectric properties; nano aluminum nitride has good injection molding properties; For composite materials, it has good matching with semiconductor silicon and good interface compatibility, which can improve the mechanical properties and thermal conductivity of composite materials.
The application of nano aluminum nitride
1. Manufacture of integrated circuit substrates, electronic devices, optical devices, radiators, high-temperature crucibles to prepare metal-based and polymer-based composite materials, especially in high-temperature sealing adhesives and electronic packaging materials to improve the heat dissipation performance and strength characteristics of the materials. Good application prospects, it can replace the currently imported micron aluminum nitride.
2. Thermally conductive silica gel and thermally conductive epoxy resin: Ultra-high thermal conductive silica gel prepared with nano aluminum nitride has good thermal conductivity, good super electrical insulation, wide electrical insulation and operating temperature (working temperature 80-250℃), lower consistency and good construction performance. Such as the gap between the CPU and the radiator, high-power transistors, thyristor components, diodes, and the heat transfer medium at the slits in contact with the substrate. Nano thermal paste is to fill the gap between IC or triode and heat sink, increase the contact area between them, and achieve a better heat dissipation effect.
3. Nano lubricating oil and anti-wear agent: The modified nano aluminum nitride ceramic particles added to the nano-ceramic engine oil act on the metal surface of the friction pair inside the engine with the lubricating oil, which is activated under the action of high temperature and extreme pressure, and is firm Infiltrate into the dents and micropores on the metal surface to repair the damaged surface and form a nano-ceramic protective film. Because of the isolation effect of this layer of film, the friction generated by the relative movement between the parts only acts on this protective film. The nano-ceramic particles change part of the friction between the friction pairs from traditional sliding friction to rolling friction like small balls. Greatly reduce friction, reduce the friction between moving parts to nearly zero, and play a super anti-wear protection effect on the engine. By improving lubrication, it can reduce the friction coefficient by more than 80% and increase the anti-wear ability by more than 350%, Reduce wear by more than 80%, prolong the life of mechanical parts by more than 3 times, reduce downtime, reduce maintenance costs, prolong the overhaul period by more than double, save energy by 10%-30%, and increase the equipment output power by 20%-40%. Only 2/10000 to 1/1000;
4. Application in high thermal conductivity plastics: The modified nano aluminum nitride powder can greatly improve the thermal conductivity of the plastic. By adding 10-30% of the experimental product to the plastic, the thermal conductivity of the plastic can be increased from 0.3 to 3, and the thermal conductivity increased by more than 10 times. Currently mainly used in PVC plastics, polyurethane plastics, PA plastics, functional plastics, etc.
5.Other application fields: Nano aluminum nitride can be used in crucibles for smelting non-ferrous metals and semiconductor materials gallium arsenide, evaporation boats, thermocouple protection tubes, high-temperature insulating parts, microwave dielectric materials, high-temperature and corrosion-resistant structural ceramics and transparent aluminum nitride microwave ceramic products.
TRUNNANO (aka. Luoyang Tongrun Nano Technology Co. Ltd.) is a trusted global chemical material supplier & manufacturer with over 12 years’experience in providing super high-quality chemicals and Nanomaterials. The aluminum nitrideproduced by our company has high purity, fine particle size. Pleasecontact us if necessary.
