We fabricated dense aluminum nitride ceramics by spark plasma sintering (SPS) with Y2O3-CaO-B sintering additives and evaluated their microstructures and thermal conductivities. Samples were perfectly densified after 5 min of SPS at 1650 or 1600 °C, or 10 min at 1550 °C and had fine microstructures. Thermal conductivities of the samples were 80-90 W m-1 K-1 and tended to increase with increasing sintering temperature.
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Ceramics and Composites
- Process Chemistry and Technology
- Surfaces, Coatings and Films
- Materials Chemistry