Synthesis and sintering behavior of yttria stabilized tetragonal zirconia doped with Al2O3

• Main Authors: Hsin-Wen Peng, 彭信文
• Other Authors: Chieh-Yuan Ding
• Format: Others
• Language: zh-TW
• Published: 2006
• Online Access: http://ndltd.ncl.edu.tw/handle/45180547757330257531

碩士 === 國立聯合大學 === 材料科學工程學系碩士班 === 94 === The effect of Al2O3–dopant on the 3mol% yttria stabilized tetragonal zirconia polycrystals (3Y-TZP/Al2O3) was investigated. A modified coprecipitation process was developed for synthesis of chemically well-dispersed powders. For comparison, 3Y-TZP powders with and without Al2O3-doping were prepared . The experimental results were characterized by ion-coupling plasma enhanced optical emission spectrometer (ICP-OES), differential thermal analyzer (DTA), X-Ray diffractometer (XRD) and field-emission scanning electronic microscopy (FE-SEM). It is found that the addition of well-dispersed alumina to 3Y-TZP enables the sintered ceramics with finer grain and more uniform grain size distribution. Experimental results show that Al2O3 may affect the density, crystalline phase and microstructure of sintered ceramics even at a low content of 0.25 wt% as long as it is uniformly dispersed in the powders.