ABSTRACT Three kinds of commercial zirconia powders with compositions (1–x)ZrO2–xY2O3 (x = 0, 3 and 8 mol-%) were sintered at 1300–1600°C in their free-standing granules. The as-received powder with x = 0 is monoclinic (M) phase. Both as-received powders with x = 3 and 8 show mixed phases dominated by tetragonal (T). The powder with x = 0 returned to M phase at room temperature after high temperature sintering. The powder with x = 3 transfer from mixed phase (T + M) to single phase T after sintering at 1300°C or 1400°C. Moreover, minor M phase appears again when the sintering temperature is above 1400°C, sintering the powder with x = 8 shows only T phase after sintering at different temperatures.

中文翻译：

---

不同 Y2O3 浓度的自立式氧化锆颗粒的烧结

摘要 三种商业氧化锆粉末的组成为 (1-x)ZrO2-xY2O3（x = 0、3 和 8 mol-%），在 1300-1600°C 下烧结成独立颗粒。x = 0 的原样粉末是单斜 (M) 相。x = 3 和 8 的两种原样粉末都显示出以四方晶 (T) 为主的混合相。x = 0 的粉末在高温烧结后在室温下返回 M 相。x = 3 的粉末在 1300°C 或 1400°C 烧结后从混合相 (T + M) 转变为单相 T。此外，当烧结温度高于 1400°C 时，次要的 M 相再次出现，x = 8 的粉末在不同温度下烧结后仅显示 T 相。