摘要
以 8 % (摩尔分数 )氧化镁部分稳定的氧化锆 ( 8%Mg -PSZ)为基料 ,向其中掺入Al2 O3,SiO2 等微量杂质 ,在 170 0℃下烧结。对烧结样品进行XRD分析 ,利用衍射峰强度半定量地计算立方相和四方相氧化锆 [(c+t) -ZrO2 ]的体积分数。使用SEM观察样品的表面形貌 ,并计算出平均晶粒尺寸。结果表明 :掺入Al2 O3有细化晶粒和降低 (c +t) -ZrO2 体积含量的作用 ,若和SiO2 按摩尔比 3∶2共同掺入 ,随着掺入量的增加 ,晶粒尺寸和 (c+t) -ZrO2 体积含量先减小后增大。Ca2 + 离子和Y3+
8% (in mole) Mg-PSZ was prepared as basic material. It was doped with small amount of dopants, such as Al2O3, SiO2, etc. The composition was sintered at 1700°C. The phase composition of (c+t)-ZrO2 was calculated semiquantitatively according to the diffracted intensity measured by XRD. The surface morphology of the samples was observed by SEM, and the average grain size was measured. It is found that doped Al2O3 can decrease the grain size and reduce the volume content of (c+t)-ZrO2. Al2O3 and SiO2 are co-doped in mole at the ratio of 3:2, the grain size and the volume content of (c+t)-ZrO2 first decrease and then increase along with the increase of dopants volume content. Ca2+ and Y3+ also affect these two parameters when they are doped in 8% Mg-partially stabilized zirconia.
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
2003年第1期25-30,共6页
Journal of The Chinese Ceramic Society
基金
国家自然科学基金资助项目 ( 5 0 2 72 0 0 9)
