1 mol% Zn²⁺-doped Y₂O₃ powder was consolidated utilizing spark plasma sintering (SPS) by systematically varying the heating schedule, sintering temperature, heating rate, holding time at the sintering temperature, and loading stress. Transparent, Zn²⁺-doped Y₂O₃ polycrystals were successfully produced at the heating rate of 2 °C/min, sintering temperature of 890 °C, holding time of 30 min, and loading stress of 150 or 170 MPa. The highest transmittance in the Zn²⁺-Y₂O₃ bodies at a wavelength of longer than 600 nm was comparable to those in the undoped SPSed Y₂O₃ in the literature. Employing a sintering temperature and loading stress higher than the optimum values led to coarsened pore and grain sizes, resulting in a decreased transparency. Low heating rate at temperatures above 700 °C was desirable for the attainment of high transparency. The grain boundary segregation of Zn²⁺ cations effectively contributed to the reduction of the sintering temperature required for attainment of transparency in the Y₂O₃ by SPS.

中文翻译：

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低温火花等离子体烧结与锌阳离子掺杂相结合生产透明氧化钇陶瓷

通过系统地改变加热时间表，烧结温度，加热速率，在烧结温度下的保持时间和负载应力，利用火花等离子体烧结（SPS）来固结1mol％的Zn ²⁺掺杂的Y ₂ O ₃粉末。以2℃/ min的加热速率，890℃的烧结温度，30分钟的保持时间以及150或170 MPa的加载应力成功地制备了透明的Zn ²⁺掺杂的Y ₂ O ₃多晶。Zn ²⁺ -Y ₂ O ₃体在大于600 nm的波长下的最高透射率与未掺杂的SPSed Y ₂ O ₃的透射率相当在文学中。使用高于最佳值的烧结温度和加载应力会导致孔和晶粒尺寸变粗，从而导致透明度降低。为了获得高透明度，在高于700℃的温度下低加热速率是理想的。Zn ²⁺阳离子的晶界偏析有效地有助于降低通过SPS在Y ₂ O _3中获得透明性所需的烧结温度。