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Learn about Thermally Conductive Aluminum Nitride（ALN）

Introduction:
Aluminum nitride AlN is the only stable compound of Al and N, and is the semiconductor with the largest energy gap in the III-V group. Aluminum nitride atoms are combined by covalent bonds, which have good chemical stability and high melting point. At the same time, it has high mechanical strength and good electrical insulation properties. It is a piezoelectric material. It has good injection molding properties, can be used in composite materials, has good matching with semiconductor silicon, good interface compatibility, and can improve the mechanical properties and thermal conductivity and dielectric properties of composite materials.

Product advantages:
The particle size distribution is concentrated,
Good dispersion,
Low metal impurity content,
Low oxygen content,
Low coefficient of thermal expansion,
Strong hydrolysis resistance.

The particle size is complete (nano-level aluminum nitride 100-200nm, 300-500nm, 1-2um, 3-5um, 10um, etc.), and surface treatment can be done according to customer requirements.

Application direction of thermally conductive aluminum nitride powder:
Special for CPU thermal silica gel system;
Special for plastic system;
Special for epoxy resin system;
High thermal conductivity filler of thermal grease and thermal grease;
High thermal conductivity filler of thermal conductive glue, thermal conductive silicone sheet, epoxy resin thermal conductive potting glue;
High thermal conductivity filler of thermally conductive engineering plastics;
Packaging materials, high temperature lubricants, adhesives;
High thermal conductivity fillers for radiators, heat-dissipating paints, and heat-dissipating inks;
Manufacture of insulating and thermally conductive fillers for high thermal conductivity integrated circuit substrates (MCPCB, FCCL);
High thermal conductivity filler of thermal interface material (TIM);
Crucible metal smelting, evaporation boat, ceramic cutting tools, cutting tools, microwave dielectric materials;
Manufacturing high thermal conductivity aluminum nitride ceramic substrates and various ceramic products.

Aluminum nitride ALN powder should be sealed and stored in a dry and cool environment. It should not be exposed to the air for a long time to prevent agglomeration due to moisture, which will affect the dispersion performance and use effect. Surface treatment can be done according to user requirements.

If you need further inquiries about aluminum nitride powder, you can consult our sales staff online.

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Thermally Conductive Plastic with nanomaterials is An Important Porter for Heat Dissipation in The LED Industry

Some people say that HEAT is the number one enemy of LEDs. Theoretically, the electro-optical conversion efficiency of the LED is about 54% (the estimated result under ideal conditions), but any omissions in the manufacturing process and any defects in the material will cause its energy conversion efficiency to drop. Based on the current level of LED technology development, the electro-optical conversion efficiency is basically less than half of the theoretical value, and in practical applications, most of them are even less than 1/4 of the theoretical value, and the remaining electric energy will be released in the form of heat energy. , This is the reason why the LED generates heat.

Among all the solutions, the heat-conducting plastics with the characteristics of uniform heat dissipation and light weight are prepared into the heat-dissipating parts of the LED: such as lamp holders, cooling and heat-dissipating lamp cups and shells, which are currently one of the most respected methods. Compared with metal materials, thermally conductive plastics consume less energy and produce less pollution in production, are more environmentally friendly, and have the characteristics of high safety factor and flexible design. With the improvement of LED light efficiency and the reduction of heat generation, the requirements for LED heat dissipation will gradually decrease, and thermally conductive plastic heat sinks will be able to meet the heat dissipation requirements of most conventional LED lamps.

Most polymer materials themselves are thermally insulating materials. To obtain materials with excellent thermal conductivity, one is to make polymer materials with high thermal conductivity; the other is to fill and modify the polymer through blending methods to form composite materials to improve Thermal conductivity of polymers.

For plastic manufacturers, the former is more technically difficult and costly, while the latter is easier to implement. According to statistics, the thermal conductivity of general plastics is only about 0.2 W/(m·K). If the plastic is filled with thermally conductive fillers, the thermal conductivity can be 1W/(m·K)～20 W/(m·K) About 5-100 times the thermal conductivity of traditional plastics.

The matrix of thermally conductive plastic is PA6/PA66, PPS, TPE, PC, PE, PP, etc.; thermally conductive fillers can be divided into two categories: thermally conductive inorganic insulating fillers and thermally conductive non-insulating fillers. Thermally conductive inorganic insulating fillers include Al2O3, BN, AlN, MgO, etc. These fillers can ensure the thermal conductivity of the composite material and maintain the electrical insulation of the resulting products, so they have been widely used. Non-insulating thermally conductive plastic fillers include metal powder, graphite, carbon black, carbon fiber, etc., which have high electrical and thermal conductivity. The former is mixed with the plastic matrix to make a thermally conductive insulating plastic, and the latter is a thermally conductive non-insulating plastic.

For filled thermally conductive polymer materials, if the filler has high thermal conductivity and good electrical insulation, the thermal conductivity of the composite material depends on the molecular chain vibration of the polymer matrix and the interaction of lattice phonons and filler lattice phonons. ; If the filler has electrical conductivity, the heat conduction in the composite material depends on the result of the interaction between the heat transfer of electrons and the lattice vibration of the polymer and the filler.

As mentioned above, the importance of thermally conductive plastics for LED lamps is self-evident. With the increasing demand for plastics in LED lights, light radiators, electric vehicles, medical equipment and light vehicles, the prospects are very optimistic.

Hongwu is supplying a variety of thermal conductive materials, such as nano diamond powder, boron nitride powder, aluminum nitride powder, alumina powder, silicon carbide powder, zinc oxide powder, etc., welcome to consult for more information on nanomaterials. https://www.hwnanomaterial.com.