Abstract Fine-grained ceramics based on solid solutions of ZrO2-x-Ln2O3 (where Ln = Sm, Yb), which are used to simulate inert matrix fuel (IMF), were obtained by colloidal chemical synthesis of powders and their Spark Plasma Sintering (SPS). It has been established that the SPS activation energy (Qs) for fine-grain ceramics based on ZrO2 corresponds to the activation energy of oxygen diffusion on grain boundaries of zirconium oxide (zirconia). We have demonstrated that introducing oxides of samarium (Sm2O3) and ytterbium (Yb2O3) into zirconia decreases SPS activation energy and stabilizes the phase composition of zirconia. Ceramics with densities up to 100% were obtained by the following modes of SPS: sintering temperature 1000–1250 °C, sintering time 6–10 min. Hydrolysis testing in the static mode (Т = 20 °C, P = 1 atm) in distilled water revealed no leaching of lanthanide ions at detection thresholds of 5 ppm for Sm ions and 0.1 ppm for Yb ions.

中文翻译：

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基于复合氧化物 ZrO 2 -Ln 2 O 3 (Ln = Sm, Yb) 的细粒陶瓷研究，通过火花等离子体烧结用于惰性基体燃料

摘要 通过粉末的胶体化学合成及其火花等离子体烧结，获得了基于 ZrO2-x-Ln2O3（其中 Ln = Sm，Yb）固溶体的细粒陶瓷，用于模拟惰性基体燃料（IMF）。 SPS）。已经确定，基于 ZrO2 的细晶粒陶瓷的 SPS 活化能 (Qs) 对应于氧化锆（氧化锆）晶界上氧扩散的活化能。我们已经证明，将钐 (Sm2O3) 和镱 (Yb2O3) 的氧化物引入氧化锆会降低 SPS 活化能并稳定氧化锆的相组成。通过以下 SPS 模式获得密度高达 100% 的陶瓷：烧结温度 1000-1250 °C，烧结时间 6-10 分钟。静态模式下的水解测试 (Т = 20 °C,