摘要
利用拟薄水铝石的凝胶作用,以浓HNO_3为引发剂,将Al_2O_3(1μm)粉末和含3%Y_2O_3的ZrO_2(200nm)粉末均匀填充在拟薄水铝石的溶胶双电层内,在一定温度和时间下胶凝固化并干燥成坯。将生坯通过不同的温度烧结后,制备出ZTA陶瓷正畸托槽材料。主要研究拟薄水铝石的胶体行为、不同固含量下生坯的性能以及ZrO_2对陶瓷晶粒结构和力学性能的影响。结果表明,经拟薄水铝石凝胶制备的陶瓷生坯具有一定抗弯强度(达4 MPa),可用于力学加工。在该制备方法中,ZrO_2可更好地发挥增韧作用,增加陶瓷烧结后致密度,提高陶瓷托槽材料的抗弯强度。
A12O3（1 μm） powder and ZrO2（200 nm） contain 3%Y2O3 powder evenly were tilled in the electrical double layer by pseudo-boehmite gel method with HNO3 as a initiator.The green body was obtained after gelling and drying under special temperature and time.ZTA ceramic bracket material was formed through different sintering temperature.The colloidal behavior of boehmite,the mechanical properties of the green bodies with different solid content and the influence of ZrO2 on grain structure and mechanical properties of the ceramic materials were studied.The results showed that the bending strength of green bodies was 4 MPa,which could be used in the mechanical processing.In this process,ZrO2 is a better toughening agent for the ceramics sample,which increased the density and the bending strength of the sintered ceramic bracket materials.
出处
《材料导报》
EI
CAS
CSCD
北大核心
2016年第4期85-89,共5页
Materials Reports
基金
唐山市科技计划项目(14130272a)
河北省高等学校科学技术研究重点项目(ZH2011118)
华北理工大学大学生创新创业训练计划项目(X2015181)
关键词
拟薄水铝石
氧化锆增韧氧化铝陶瓷
抗弯强度
陶瓷托槽
pseudo-boehmite
zirconia toughened alumina ceramics
flexural strength
ceramic bracket
