3Y‐TZP sinters with 1, 5, 10, and 15 mol% of Al₂O₃ were prepared using two different procedures from a 3‐YSZ powder synthesized via the citrate process. In the first procedure, alumina was introduced during synthesis via the citrate method. In the second one, the 3‐YSZ powder was impregnated with aluminum nitrate. All samples were sintered at 1773 K. The prepared composites were evaluated in terms of their microstructure, chemical and phase composition, and electrical properties. The total conductivity of the 3Y‐TZP/Al₂O₃ composite material, which contained primarily the tetragonal phase, was found to increase with temperature, and to decrease for reduced concentrations of alumina in 3Y‐TZP. In the case of the samples which had alumina introduced via impregnation, its higher content was not associated with significantly lower electrical conductivity. These samples generally exhibited higher conductivity than the samples to which alumina had been added via chemical synthesis.

中文翻译：

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柠檬酸盐凝胶法制得的3Y-TZP / Al2O3复合材料的微观结构和电性能

用两种不同的方法，通过柠檬酸盐法合成的3-YSZ粉末，制备了具有1、5、10和15 mol％Al ₂ O _3的3Y-TZP烧结体。在第一个步骤中，在合成过程中通过柠檬酸盐方法引入了氧化铝。在第二个步骤中，将3-YSZ粉末浸入硝酸铝中。所有样品均在1773 K下烧结。对制备的复合材料的微观结构，化学和相组成以及电性能进行了评估。3Y‐TZP / Al ₂ O ₃的总电导率发现主要包含四方相的复合材料会随着温度的升高而增加，并且随着3Y-TZP中氧化铝浓度的降低而降低。在通过浸渍引入氧化铝的样品的情况下，其较高的含量与显着较低的电导率无关。这些样品通常显示出比通过化学合成法添加了氧化铝的样品更高的电导率。