本研究采用二步气压烧结工艺,系统地研究了烧结助剂LY(La₂O₃+Y₂O₃)对Si₃N₄陶瓷的烧结密度及抗弯强度的影响,发现相对密度随助剂含量的增加而增加。在助剂含量为18wt%时,抗弯强度最大为422MPa。此后,助剂含量继续增加时,抗弯强度下降。

For two-step GPS Si₃N₄ ceramics,the effects of the additional content of sintered aids LY(La₂ O₃+ Y₂O₃)on the sintered relative density and the mechanical properties were studied systematically. The results revealed that the sintered relative density increased with the increasing of the amount of the aids.It was founded that the best bending strength was 422 MPa when aids was 18 wt%. Then,with the increasing of aids,the bending strength began to decrease remarkably.