Tailoring starting powder composition with Si and Si3N4 for oxygen removal and microstructure optimization in high-thermal-conductivity Si3N4 ceramics

Key Points

• High-thermal-conductivity silicon nitride ceramics show enhanced properties with tailored powder composition and successful sintering.
• The optimized composition leads to significant improvements in thermal conductivity, achieving metrics previously unattained in silicon nitride ceramics.
• Sintering process was observed to demonstrate optimal microstructure variation resulting from adjustments in silicon and silicon nitride content.
• This optimization suggests significant enhancements in material performance, which could impact electronics and thermal management applications.