Fabrication and luminescence properties of highly transparent and submicrometer-grained Yb:Y2O3 ceramics by hot-pressing sintering

烧结 材料科学 透明陶瓷 陶瓷 热压 制作 微观结构 断裂韧性 热等静压 透射率 复合材料 紧迫的 粒度 晶粒生长 冶金 光电子学 替代医学 病理 医学
作者
Chengrui Liu,Guohong Zhou,Juan Jiang,Song Hu,Tianjin Zhang,Shiwei Wang,Zhenhai Xue,Hui Lin,Xianpeng Qin,Liangbing Gan
出处
期刊:Journal of Alloys and Compounds [Elsevier]
卷期号:898: 163002-163002 被引量:6
标识
DOI:10.1016/j.jallcom.2021.163002
摘要

Highly transparent and submicrometer-grained Yb:Y2O3 ceramics were obtained by hot-pressing method with ZrO2 sintering additive. Hot-pressing method provides extra driving force to promote the densification of Yb:Y2O3 transparent ceramics, resulting in high transmittance achieved. The transmittances of all samples were ranging from 80.5% to 81.8% at 1100 nm and 72.7–77.7% at 600 nm. The ceramic samples in this work were sintered at a low temperature of 1600 ℃ for 3 h, providing dense microstructures with average grain size less than 1 µm, which are smaller than those of Yb:Y2O3 ceramics prepared by other traditional sintering techniques. The microhardness and fracture toughness were ranging from 8.16 to 7.99 GPa, and from 0.94 to 0.88 MPa·m1/2, respectively, which are higher than the comparison samples fabricated by pressureless sintering. The absorption cross-sections of the 1 at% Yb-doped sample at 950 and 976 nm were 0.93 × 10−20 and 1.22 × 10−20 cm2, respectively. The fluorescence decay lifetime at 1032 nm was in the range of 0.79–1.36 ms. According to the available literature, this is the first report about Yb:Y2O3 transparent ceramics fabricated by hot-pressing sintering without any combined sintering process. The ceramics obtained may have potential use for solid-state lasers partly replacing single crystals.
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