Aluminum nitride ceramic substrate and aluminum oxide ceramic substrate

Overview of aluminum nitride

Aluminum nitride, Covalent bond compound, is a Network covalent bonding, which belongs to diamond like nitride, Hexagonal crystal family, Wurtzite type crystal structure, non-toxic, white or gray. AlN can be stabilized up to 2200 ℃. The room temperature strength is high, and the strength decreases slowly with the increase of temperature. With good thermal conductivity and small coefficient of thermal expansion, it is a good heat-resistant impact material. Strong resistance to molten metal erosion, making it an ideal crucible material for melting and casting pure iron, aluminum, or aluminum alloys. Aluminum nitride is still an electrical insulator with good dielectric properties, and it is also very promising for use as an electrical component. The aluminum nitride coating on the surface of gallium arsenide can protect it from ion implantation during annealing. Aluminum nitride is also a catalyst for transforming hexagonal Boron nitride into cubic Boron nitride. Slow reaction with water at room temperature. It can be synthesized from aluminum powder in ammonia or nitrogen atmosphere at 800-1000 ℃, and the product is a white to grayish blue powder. Alternatively, it can be synthesized from the Al2O3-C-N2 system at 1600~1750 ℃, resulting in a gray white powder. Or Aluminium chloride and ammonia through vapor phase reaction. The coating can be synthesized by vapor deposition from AlCl3-NH3 system.

Application of aluminum nitride

There are reports that most current research is developing a semiconductor based light emitting diode (LED) that operates in ultraviolet light, with a wavelength of 250 nanometers. In May 2006, there was a report stating that an inefficient diode could emit light waves with a wavelength of 210 nanometers. A 6.2eV energy gap was measured on a single aluminum nitride crystal using vacuum ultraviolet reflectance. In theory, the energy gap allows some waves with a wavelength of approximately 200 nanometers to pass through. But when implemented in business, many difficulties need to be overcome. Aluminum nitride is used in Optoelectronics, including optical storage interface and electronic matrix as induced layer, chip carrier under high thermal conductivity, and military use.

Due to the Piezoelectricity of aluminum nitride, the Extensionality extension of aluminum nitride crystals is also used for surface acoustic wave detectors. The detector will be placed on a silicon wafer. Only very few places can reliably manufacture these thin films.

Aluminum nitride ceramics have the characteristics of high room temperature and high temperature strength, low expansion coefficient, and good thermal conductivity, and can be used as heat exchanger materials for high-temperature structural components.

Utilizing the corrosion resistance of aluminum nitride ceramics to metals and alloys such as iron and aluminum, it can be used as a crucible and casting mold material for the melting of metals such as Al, Cu, Ag, and Pb.

Comparison between aluminum nitride ceramic substrate and alumina ceramic substrate

In recent years, due to the improvement of some merchants' technological level, the production cost of ceramic substrates has decreased, and the pass rate has increased. At present, ceramic substrates are highly popular and widely used in the LED industry, automotive industry, and high-tech electronics. Ceramic substrates are often used in the field of LED, and alumina ceramic substrates or aluminum nitride ceramic substrates are chosen according to the different applications.

Analyze the differences between aluminum nitride ceramic substrate and aluminum oxide ceramic substrate from three aspects.

1、 Thermal conductivity: Both are ceramic circuit substrates, but there are significant differences. The thermal conductivity of aluminum oxide is about 45W/(m · K), while the thermal conductivity of aluminum nitride is close to 7 times that;

2、 Thermal expansion coefficient: The thermal conductivity of alumina ceramic circuit boards is basically the same as that of aluminum nitride ceramic circuit boards. Thermal conductivity and thermal expansion coefficient are the parameters that directly reflect the performance of circuit boards. We believe that you can already see the advantages of aluminum nitride ceramic circuit boards more intuitively. In fact, these two points are not only limited to aluminum nitride ceramic circuit boards. Aluminum nitride ceramic circuit boards can minimize the fragility of ceramic circuit boards, and the hardness of aluminum nitride ceramic circuit boards is much higher than that of aluminum oxide ceramic circuit boards.

3、 Different application markets: Aluminum nitride ceramic substrates are often used for high-power heat dissipation, such as LED high-power lighting, or in communication products that require excellent insulation; Aluminum oxide ceramic substrates are generally used in small and medium-sized power applications, as well as in LED bead lighting and sensors and other products.

The price of spherical aluminum nitride AlN particles

The price of spherical aluminum nitride AlN particles will vary randomly with the production cost, transportation cost, international situation, exchange rate, and market supply and demand of spherical aluminum nitride AlN particles. Tanki New Materials Co., Ltd. aims to help various industries and chemical wholesalers find high-quality, low-cost nanomaterials and chemicals by providing a full set of customized services. If you are looking for spherical aluminum nitride AlN particles, please feel free to send an inquiry to get the latest price of spherical aluminum nitride AlN particles.

Supplier of spherical aluminum nitride AlN particles

As a global supplier of spherical aluminum nitride AlN particles, Tanki New Materials Co. .Ltd has extensive experience in the performance, application and cost-effective manufacturing of advanced and engineering materials. The company has successfully developed a series of powder materials (molybdenum disilicide) , Lanthanum nitride (LaN powder, calcium silicide, iron boride), high-purity targets, functional ceramics and structural devices, and provide OEM services.

If you are looking for high-quality spherical aluminum nitride AlN, please feel free to contact us and send an inquiry. ( sales@ozbo.com ）.