快、慢速烧结渗透工艺对In-Ceram氧化铝基底微观结构和颜色的影响

Effects of slow or rapid infiltration-sintering process on the micro-structure and color of In-Ceram alumina substrate

目的:探讨不同烧结渗透工艺对In-Ceram氧化铝基底结构和颜色的影响。方法:应用VitaIn-Ceram氧化铝为原料制作试样,分别采用快、慢速烧结渗透的方法,观察试样渗透前、后基底的微观结构和颜色变化。结果:慢速烧结渗透后基底微观结构更为均匀致密,且孔隙率小于快速渗透后(P<0.05),除快速渗透后a*值变化不显著外,其余各组L*、a*、b*值均增加显著(P<0.05)。结论:不同的烧结渗透工艺对In-Ceram氧化铝基底的结构和颜色产生了显著影响。慢速烧结渗透工艺可使In-Ceram氧化铝基底结构更加均匀、致密,孔隙率降低,并且对基底色彩的影响较小。

AIM： To investigate the effects of presintering and infiltration technique on the color and micro- structure of In - Ceram alumina substrate. METHODS ： The samples made of lu - Ceram alumina were divid into rap- id presintering and infiltration group and slow presintering and infiltration group. Then the diversity of color and micro- structure of different subslrates were observed. RESULTS： In comparison with rapid presintering and infiltration group, the substrate in slow presintering and infiltration group is more compact in microstructure and the porosity of slowly presintered group is much lower（P 〈 0.05）. Values of L ＊ ,a ＊ ,b ＊ were all significantly increased except for a ＊ after rapid presitering and infiltration technique（P 〈 0.05 ）. CONCLUSION： Presintering and infiltration technique had significant effects on the micro - structure and color of the In - Ceram alumina substrate. The slow presintering and infiltration technique can make the In - Ceram alumina substrate more even and compact with comparative lower porosity. It causes less influence to the color of substrate.