利用氧化铝的颗粒增强作用,采用常规烧结法制备了氧化铝改性钾长石牙科陶瓷.通过实验确定了钾长石复合陶瓷的最佳烧结工艺,分析了工艺条件对烧结效果、可加工性、显微硬度和抗弯强度等性能的影响.用XRD、SEM对钾长石复合材料进行了表征.研究表明:添加氧化铝可以提高钾长石的烧结温度,当Al2O3添加量为20wt％时,其最佳烧结温度为1200℃,相对密度达97.9％.此外,添加氧化铝可以显著改善钾长石陶瓷的性能,当Al2O3 添加量为5wt％时,钾长石瓷的磨削率达到最大,当Al2O3添加量为20wt％时,钾长石瓷的显微硬度提高了26.9％.并且随着氧化铝添加量的增加,钾长石陶瓷的抗弯强度逐渐增强.
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