Abstract The textural properties (specific surface area and pore volume/diameter) of yttria-zirconia (Y2O3-ZrO2) ceramic material are critically important to its application in environmental and industrial catalysis. In this work, we tuned the textural properties of the material by a lauric acid-assisted coprecipitation method with high operability and cost-effectiveness. Lauric acid-modified and non-modified yttrium-zirconium hydroxides were prepared. The two hydroxides were then calcined at 700, 800, 900 and 950 °C, respectively, resulting in eight Y2O3-ZrO2 oxides. The surface properties and thermal decomposition behavior of the hydroxides and the structural and textural properties of the oxides were systematically investigated. It was found that lauric acid was chemically bound to the hydroxide surface, which decreased the crystallite size of the oxides. More importantly, intercrystalline aggregation in the oxides was significantly inhibited during the thermal treatment. As a result, the textural properties of mesoporous Y2O3-ZrO2 solid solution were greatly improved even after the material was calcined at high temperatures. As-prepared materials have higher specific surface area (69 to 24 m2/g) and pore volume (0.24 to 0.18 mL/g) than reported congener materials. This work may stimulate ideas for improved processing techniques which were applied to develop Y2O3-ZrO2 ceramic material with excellent textural properties.

中文翻译：

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通过月桂酸辅助合成制备具有改善的质构特性的介孔氧化钇-氧化锆固溶体

摘要 氧化钇-氧化锆（Y2O3-ZrO2）陶瓷材料的结构特性（比表面积和孔体积/直径）对其在环境和工业催化中的应用至关重要。在这项工作中，我们通过具有高可操作性和成本效益的月桂酸辅助共沉淀方法调整了材料的质地特性。制备了月桂酸改性和未改性的钇-锆氢氧化物。然后将这两种氢氧化物分别在 700、800、900 和 950 °C 下煅烧，得到八种 Y2O3-ZrO2 氧化物。系统地研究了氢氧化物的表面特性和热分解行为以及氧化物的结构和织构特性。发现月桂酸与氢氧化物表面化学结合，这减小了氧化物的微晶尺寸。更重要的是，在热处理过程中显着抑制了氧化物中的晶间聚集。结果，即使在高温煅烧材料后，介孔 Y2O3-ZrO2 固溶体的织构性能也大大提高。所制备的材料比报道的同类材料具有更高的比表面积（69 至 24 m2/g）和孔体积（0.24 至 0.18 mL/g）。这项工作可能会激发改进加工技术的想法，这些技术用于开发具有优异质地特性的 Y2O3-ZrO2 陶瓷材料。即使在高温煅烧材料后，介孔 Y2O3-ZrO2 固溶体的织构性能也得到了极大的改善。所制备的材料比报道的同类材料具有更高的比表面积（69 至 24 m2/g）和孔体积（0.24 至 0.18 mL/g）。这项工作可能会激发改进加工技术的想法，这些技术用于开发具有优异质地特性的 Y2O3-ZrO2 陶瓷材料。即使在高温煅烧材料后，介孔 Y2O3-ZrO2 固溶体的织构性能也得到了极大的改善。所制备的材料比报道的同类材料具有更高的比表面积（69 至 24 m2/g）和孔体积（0.24 至 0.18 mL/g）。这项工作可能会激发改进加工技术的想法，这些技术用于开发具有优异质地特性的 Y2O3-ZrO2 陶瓷材料。