Aluminum Nitride (AlN) Substrates

The AIN crystal is a covalent bond compound with [AIN4] tetrahedron as the structural unit, and has a wurtzite structure, and belongs to the hexagonal crystal system.

ALN with outstanding insulating properties and extremely high thermal conductivity. In addition, aluminum nitride has the characteristics that it is not attacked by aluminum liquid and other molten metals and gallium arsenide, and particularly has excellent corrosion resistance to molten aluminum liquid.

Aluminum Nitride Substrate Advantages

• Very high thermal conductivity
• Non-toxic alternative to BeO
• Low thermal expansion similar to Si, GaN, and GaAs semiconductors
• High dielectric strength

What is alumina ceramic membrane?

The ceramic membrane is an asymmetric membrane formed by inorganic ceramic materials prepared by a special process. It is divided into two types: tubular ceramic membrane and flat ceramic membrane.

The ceramic membrane has high separation efficiency, good chemical stability, acid and alkali resistance, organic solvent resistance, bacteria resistance, high-temperature resistance, pollution resistance, high mechanical strength, good regeneration performance, simple separation process, low energy consumption, and long service life.

Application fields:

• Food industry
• Plant (medicine) deep processing
• Biomedicine
• Fermentation
• Fine chemicals

Characteristics of ceramic membrane materials:
A coating film is required on the surface of the ceramic. The coating film is to apply a filter layer. The material used depends on the pore size，100 nm is 99.995% alpha-alumina, 50-30 nm is 99.99% zirconia, and 10 nm is 99.95% Titanium oxide.

• Support carrier: imported white corundum.
• Microfiltration membrane: imported 99.995% purity alpha-alumina.
• Ultrafiltration membrane: Hejal’s core invention patent, monodispersed 99.99% zirconia/titanium oxide.