氮化铝（AlN）是一种六方纤锌矿结构的共价键化合物，晶体结构和微观组织如图1所示。室温强度高、热膨胀系数小、抗熔融金属侵蚀的能力强、介电性能良好，这些得天独厚的优点使其成为高导热材料而引起国内外的普遍关注。作为高性能的介电陶瓷，氮化铝可以取代碳化硅，甚至部分取代氧化铝，被视为新一代很有发展前途的优良的基片材料。

Aluminum nitride (AlN) is a covalent bond of six - party wurtzite structure, crystal structure and microstructure, as shown in Figure 1. The advantages such as high temperature strength at room temperature, small thermal expansion coefficient, strong corrosion resistance to molten metal and good dielectric properties, which make them become high thermal conductivity materials, have attracted widespread attention at home and abroad. As high-performance dielectric ceramics, AlN can replace silicon carbide and even replace alumina partially. It is regarded as a promising promising substrate material for the next generation.

常见的AlN坯体成型方法

Common forming method of AlN body

由氮化铝粉末制备氮化铝陶瓷坯体，需要利用成型工艺把粉体制备成坯体，然后再进行烧结工作。氮化铝成型工艺主要有干压成型、等静压成型、流延法成型和注射成型等。

The aluminum nitride ceramic body is prepared from aluminum nitride powder. It is necessary to use the molding process to prepare the powder system into the billet and then to make the sintering. The forming process of aluminum nitride mainly consists of dry pressing, isostatic pressing, casting and injection molding.