Processing and Component Development of Aluminum Nitride Heat Exchangers

摘要

AlN ceramics are known for their wide range of applications in electronics mainly as substrate materials for semiconductor IC in computer applications, optical components, e.g. heatsinks for laser diodes and high performance hot gas/water heat exchangers because of their advantageous thermophysical properties. Conventional heat exchangers made of steel and copper widely used in thermal value heating systems are less efficient and less reliable than polycrystalline AlN heat exchangers due to their inferior thermal conductivity (20 W/mK) and long term corrosion problems. These are based on the interaction of the material with condensation products from the vapour phase forming dilute acids. Due to the excellent thermophysical properties like high thermal conductivity and advantageous thermal expansion behaviour, AlN components for heat exchangers with net shape quality were fabricated.