磷酸盐玻璃渗透3Y-TZP全瓷齿科材料的研究  

Study of Phosphate Glass Infiltrated 3Y-TZP All-ceramic Dental Material

作　　者：施申勇[1] 张青红[1] 王宏志[1] 李耀刚[1] 

机构地区：[1]东华大学材料科学与工程学院,上海201620

出　　处：《硅酸盐通报》2012年第4期780-784,共5页Bulletin of the Chinese Ceramic Society

摘　　要：将3Y-TZP粉体经过干压成型和1250℃无压烧结,得到了可切削性能良好、孔隙率适中的多孔3Y-TZP陶瓷基体。配制了磷酸盐玻璃,经过烧结、急冷、粉碎后得到了成分为48.0%P2O5、25.0%CaO、10.0%B2O3、6.0%Al2O3、6.0%Li2O、3.0%ZrO2和2.0%Y2O3的玻璃粉料,玻璃粉料在1100℃渗透温度下具有合适的粘度、良好的渗透性和化学相容性,且平均热膨胀系数与陶瓷基体匹配。在磷酸盐玻璃中引入氧化钇后,渗透多孔3Y-TZP后形成陶瓷/玻璃渗透复合体中,氧化锆以四方相为主,没有发生明显相变。陶瓷/玻璃渗透复合体的弯曲强度和断裂韧性分别达到了380.4 MPa和5.40 MPa.m1/2,且渗透过程中收缩率低于0.1%,达到近"净尺寸"成型标准。The 3% yttria stabilized tetragonal zirconia polycrystal （3Y-TZP） ceramic matrix with a good mechanical properties and appropriate porosity was prepared by dry-pressing molding, and then was pressureless sintered at 1250 ℃. The phosphate glass powder was prepared through the processing of sintering, quenching and crushing. The composition of the oxides that was made for the phosphate glass contained 48.0% P205,25.0% CaO,10.0% B203 ,6.0% A1203 ,6.0% Li20,3.0% ZrO2 and 2.0% Y2O3- The phosphate glass powder had a suitable viscosity, favorable permeability and good chemically compatible at the infiltration temperature of 1100 ~C. Meanwhile, the average coefficient of thermal expansion （CTE） of the glass matched with the 3Y-TZP matrix. The 3Y-TZP/glass composites was prepared by glass-infiltrating into 3Y-TZP matrix. When the yttria was added into the phosphate glass, the main crystalline phases of zirconia would keep tetragonal phase after the phosphate glass infiltration. The flexural strength and fracture toughness of the composites were achieved to of 380.4 MPa and 5.40 MPa · m1/2, respectively. The shrinkage of the composite is lower than 0.1% , which can attain the near net-shape fabrication purpose.

关 键 词：磷酸盐玻璃 3Y-TZP 渗透 全瓷齿科材料 多孔陶瓷 

分 类 号：TB332[一般工业技术—材料科学与工程]