氧化铝改性钾长石牙科陶瓷的研究  

Research on Alumina Modified Feldspathic Dental Ceramics

作　　者：高辉[1] 张光磊[2] 邵长涛[2] 

机构地区：[1]同济大学材料科学与工程学院,上海201804 [2]石家庄铁道大学材料科学与工程学院,石家庄050043

出　　处：《无机材料学报》2011年第9期983-986,共4页Journal of Inorganic Materials

基　　金：河北省自然科学基金(E2009000901)~~

摘　　要：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.Alumina modified feldspathic dental ceramics were fabricated by common sintering method,using alu-mina as an additive to strengthen and toughen the feldspathic ceramics.The prescription and the sintering technol-ogy of the feldspathic ceramics composite materials were identified.The influences of sintering technology on the machinability,the microhardness and the flexural strength were discussed.The feldspathic ceramics composite ma-terials were characterized by XRD and SEM.The results reveal that the sintering temperature of feldspathic ceram-ics is raised with the increase of alumina content.Where the relative density of the feld spathic ceramics added with 20wt% Al2O3 reach 97.9% after sintered at 1200℃.Furthermore,the property of feldspathic ceramics is improved obviously with the addition of alumina.The abrasion rate reaches the maximum with the addition of 5wt% alumina,the microhardness is increased by 26.9% with addition of 20wt% Al2O3,and the flexural strength is increased with the increase of alumina content.

关 键 词：牙科陶瓷 常规烧结 改性 钾长石 

分 类 号：TQ171[化学工程—玻璃工业] R783[化学工程—硅酸盐工业]