When temperature was above 1550, the liquid phase in sintering body would separated into two phases, one was rich-Si liquid phase, which consisted of Ce, N, Si, O etc, another was rich-Mg liquid phase.

• 在烧结温度高于1550℃时，烧结体内液相会分为两相，一为富Si液相，包括Ce、N、Si、O等元素，一为富Mg液相。