Liu Yan, Liu Chengrui, Qin Xianpeng, Gan Lin, Zhou Guohong, Jiang Juan, Zhang Tianjin, Chen Hetuo, Wang Zhengjuan, Wang Shiwei
State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China.
Collaborative Innovation Center for Advanced Organic Chemical Materials Co-Constructed by the Province and Ministry, Ministry of Education Key Laboratory for the Green Preparation and Application of Functional Materials, School of Material Science and Engineering, Hubei University, Wuhan 430062, China.
Materials (Basel). 2023 Jun 21;16(13):4504. doi: 10.3390/ma16134504.
Highly transparent Er:YO ceramics (1-9 at.% Er) were fabricated by hot pressing sintering with ZrO as the sintering additive. The microstructures, transmittance, luminescent properties, thermal conductivity, and mechanical properties of the Er:YO ceramic samples were investigated in detail. The samples all exhibited dense and fine grain microstructures; the average grain sizes were about 0.8 μm. The transmittance levels of the samples with various Er concentrations (2 mm thick) at the wavelengths of 600 and 2700 nm were ~74 and ~83%, respectively. As the Er doping concentration increased from 1 to 9 at.%, the up-conversion luminescence of the samples gradually changed from green to red, with the intensity ratio of red/green light increasing from 0.28 to 2.01. Meanwhile, the down-conversion luminescence properties of the specimens were also studied. When the samples were under 980 nm excitation, the emission bands were detected at 1552, 1573, 1639, and 1661 nm. The thermal conductivity of the samples was found to decrease from 8.72 to 5.81 W/(m·K) with an increase of the Er concentration from 1 to 9 at.%. Moreover, the microhardness and fracture toughness of the samples with 1 at.% Er concentration were ~8.51 GPa and ~1.03 MPa·m, respectively.
采用ZrO作为烧结添加剂，通过热压烧结制备了高透明的Er:YO陶瓷（Er含量为1 - 9原子百分比）。详细研究了Er:YO陶瓷样品的微观结构、透过率、发光性能、热导率和力学性能。所有样品均呈现出致密且晶粒细小的微观结构，平均晶粒尺寸约为0.8μm。不同Er浓度（2mm厚）的样品在600nm和2700nm波长处的透过率分别约为74%和83%。随着Er掺杂浓度从1原子百分比增加到9原子百分比，样品的上转换发光逐渐从绿色变为红色，红光/绿光强度比从0.28增加到2.01。同时，还研究了样品的下转换发光性能。当样品在980nm激发下时，在1552、1573、1639和1661nm处检测到发射带。发现随着Er浓度从1原子百分比增加到9原子百分比，样品的热导率从8.72W/(m·K)降至5.81W/(m·K)。此外，Er浓度为1原子百分比的样品的显微硬度和断裂韧性分别约为8.51GPa和1.03MPa·m。
