Improved thermal conductivity of β‐Si3N4 ceramics by lowering SiO2/Y2O3 ratio using YH2 as sintering additive

A two‐step sintering process was conducted to produce β‐Si3N4 ceramics with high thermal conductivity. During the first step, native SiO2 was eliminated, and Y2O3 was in situ generated by a metal hydride reduction process, resulting in a high Y2O3/SiO2 ratio. The substitution YH2 for Y2O3 endow Si3N...

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