Polymer Materials Thermal Conductivity Additive: High Purity Submicron Aluminum Nitride Powder

Polymer Materials Thermal Conductivity Additive: High Purity Submicron Aluminum Nitride Powder

Aluminum nitride is an atomic shiny tailor-made to the case of diamond - analogous equivalent nitride. The maximum stability is about 2200 C. The room temperature is high and the intensity decreases slowly with temperatures increasing. It has good thermal conductivity coefficient and low thermal expansion. It becomes a good thermal shock material. With its strong ability of abrasion resistance molten, aluminum nitride is an nonpareil crucible material for casting inflexible, aluminum or aluminum alloy.
Aluminum nitride is an electrical insulator with good dielectric properties. It is also upbeat for the electrical components. Due to the characteristics of aluminum nitride piezoelectric and silicon powder effect, the extensional stretching of the aluminum nitride sunny for surface acoustic gesture recorder. Aluminum nitride used in optoelectronic engineering, including optical storage interface and electronic matrix dielectric layer, high thermal conductivity make an chip carrier, as well as for military purposes. Ultra - fine aluminum nitride powder is mainly used to do the thermal conductive wrapping of polymer materials. It is very good for high thermal insulation wrapping in the electronic gum and conductive all-around. Application prospects are very broad. In LED heat dissipation and heat transfer.
Application of the aluminum nitride powder in the polymer material thermal conductivity is not hoping. The main actuation is that when using it, the heat conduction heat transfer effect is far from the actual assessment data. The aluminum nitride powder is a highly material to imbibe moisture and oxygen, an exposure to moisture and oxygen, on the hydrolysis of oxidized and invisible its thermal conductivity thermal performance characteristics, this is the current constraints of the aluminum nitride powder quandary. The ultra - fine aluminum nitride powder, without surface treatment and modification, it is difficult with the polymer nickel powder material mixed evenly, making it difficult to die a good thermal conductivity channels, interpenetrating networks, it is difficult to solve the thermal conductivity of the polymer heat transfer.
For the problems of hydrolysis of aluminum nitride, oxide and difficult dispersion, we can use high vacuum DC arc plasma evaporation process. The evaporation of high purity aluminum targets nitride condensing, high purity mortally - fine aluminum nitride powder, in the production process supreme, add aluminum nitride - line clock in treatment process, the drop in resistance to hydrolysis groups grafted polymer coupling agent, macromolecular the dispersant coupling and pop in crosslinking reaction mode of aluminum nitride powder drop in waterproof and anti - devouring treatment, then the aluminum nitride powder is preprated. In the use of the process, the resistance to hydrolysis and element, powerfully utilitarian the thermal insulation properties of the aluminum nitride powder, aluminum nitride powder after modification of a good, well mingled with the polymer considerable to system a very dense thermal conductivity channel and interpenetrating network, to maximize the play of the thermal conductivity, thermal influence.
Applying directions of modified ultra - fine aluminum nitride powder are as follows: heat silica gel and thermal conductivity of epoxy resin, LED packaging materials; conductive conversant PA, PPS, the PE, the PC; high thermal conductivity of silicone rubber, fluorine rubber copper powder ( FCu ) applications and for the field of electronics and electrical industries. Other application areas are: fine aluminum nitride powder can be used for perspiring non - ferrous metals and semiconductor materials, gallium arsenide crucible, the evaporation bottom, thermocouple protection main, high temperature insulation, microwave dielectric materials, high temperature and erosion - resistant structural ceramics and transparent to microwave ceramics, as well as the application of polyimide resin, the LED heat dissipation, thermal insulation of mica video, thermal command, high thermal conductivity of the insulation varnished essence, as well as conducting oil, high thermal conductivity slot insulation and high thermal conductivity of the impregnated resin.