YAG多孔陶瓷的烧结工艺优化及性能研究

摘要

由于钇铝石榴石(YAG)具有许多优异的性能,因此其被广泛研究和应用.本文对YAG多孔陶瓷烧结工艺进行优化研究,通过研究结果表明:随着升温速率减慢,气孔率先增大后减小,而抗压强度则呈现增大趋势.随着排碳温度的提升,陶瓷的气孔率就降低,但是抗压强度反而有所增强.随着排碳时间的增长,陶瓷气孔率反而下降,但是抗压强度却有所上升.随着烧结温度的增加,陶瓷的气孔率呈现出先增大后减小的趋势,但是抗压强度一直保持增大趋势.随着保温时间的延长,陶瓷气孔率出现降低现象,但是抗压强度则增大.结合YAG多孔陶瓷的气孔率和抗压强度综合考虑,YAG多孔陶瓷的烧结工艺得以优化,较佳烧结工艺为升温速率为8 ℃/min、排碳温度为800 ℃、排碳时间为1 h、烧结温度为 1450 ℃,保温时间为2 h,所制备的YAG多孔陶瓷气孔率为57.4%,抗压强度为8.89 MPa.%YAG posing some excellent properties is investigated and applied widely. The sintering technologies of YAG porous ceramics were optimized. The results are shown as follows, the porosity is first increased and second decreased with an decreasing increasing temperature speed, the compressive strength is shown the increasing tendency. The porosity is decreased with an increasing removing carbon temperature, the compressive strength is shown the increasing tendency. The porosity is decreased with an increasing removing carbon time, the compressive strength is shown the increasing tendency. The porosity is first increased and second decreased with an increasing sintering temperature, the compressive strength is shown the increasing tendency. The porosity is decreased with an increasing holding time, the compressive strength is shown the increasing tendency. Sintering technology of YAG porous ceramics is optimized on the basis of porosity and compressive strength, the better sintering technology is increasing temperature ratio for 8 ℃/min, removing carbon temperature at 800 ℃, removing carbon time for 1 h, sintering temperature at 1450 ℃ and holding time for 2 h. The porosity of prepared YAG porous ceramics is 57.4%, the compressive strength is 8.89 MPa.