红外透明 Y2O3 陶瓷：氧化锆浓度对光学和机械性能的影响

IF 2.9 Q1 MATERIALS SCIENCE, CERAMICS Open Ceramics Pub Date : 2024-08-30 DOI:10.1016/j.oceram.2024.100666

Dariia Chernomorets , Pietro Galizia , Giacomo Zanetti , Stefano Varas , Alessandro Chiasera , Andreana Piancastelli , Roman Yavetskiy , Jan Hostaša

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摘要

通过在相对较低的温度（1735 °C）下反应真空烧结 22 小时，获得了含有不同数量 ZrO2 的 Y2O3 透明陶瓷。研究了 0-15 mol.% 范围内的 ZrO2 浓度对陶瓷的微观结构、相组成、显微硬度以及在可见光和红外范围内的光学特性的影响。SEM 和 XRD 结果表明，在所研究的浓度范围内不存在次生相，表明形成了单相固溶体。研究表明，掺杂 ZrO2 会大大减小陶瓷的平均晶粒尺寸，而微硬度则与之相反。掺杂 15 摩尔% ZrO2 的 Y2O3 陶瓷在可见光波长范围内的透射率最高。另一方面，掺杂 5 摩尔% ZrO2 和 7 摩尔% ZrO2 的 Y2O3 可被视为第一大气窗口（3-5 微米）的理想材料。

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IR-transparent Y2O3 ceramics: Effect of zirconia concentration on optical and mechanical properties

Y₂O₃ transparent ceramics with different amounts of ZrO₂ were obtained by reactive vacuum sintering at a relatively low temperature of 1735 °C for 22 h. The influence of ZrO₂ concentration within the 0–15 mol.% range on the microstructure, phase composition, microhardness, and optical properties of ceramics in the visible and IR ranges was investigated. SEM and XRD results indicate the absence of secondary phases in the studied concentration range, indicating the formation of single-phase solid solutions. It was shown that doping by ZrO₂ considerably decreases the average grain size of ceramics, while microhardness has the opposite behaviour. 15 mol.% ZrO₂-doped Y₂O₃ ceramics demonstrated the highest transmittance in the visible wavelength range. On the other hand, 5 and 7 mol.% ZrO₂-doped Y₂O₃ could be considered promising materials for the first atmospheric window (3–5 μm).