Ceramic PCBs are made from thermally conductive ceramic powders combined with organic binders that facilitate heat transfer. The thermal conductivity of ceramic PCBs ranges from 9 to 20 W/m. Ceramic PCBs are a type of printed circuit board where the substrate is made from highly thermally conductive ceramics such as aluminum oxide (Al₂O₃), aluminum nitride (AlN), beryllium oxide (BeO)... https://www.pcbhamal.com/pcb-fabrication-capabilities/ceramic-pcb/