Fabrication, microstructure, mechanical and luminescence properties of transparent Yb3+-doped Sr5(PO4)3F nanostructured ceramics
Fabrication, microstructure, mechanical and luminescence properties of transparent Yb3+-doped Sr5(PO4)3F nanostructured ceramics
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DOI：
10.1016/j.jeurceramsoc.2022.07.041
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发表时间：
2022-08-13
影响因子：
5.7
通讯作者：
Mei, Bingchu
中科院分区：
文献类型：
--
作者：
Liu, Xinwen;Tan, Guolong;Mei, Bingchu
锶-5(PO4)(3)F(S-氟化铝)晶体材料因其巨大的吸收和发射截面以及较长的荧光寿命而被认为是最理想的二极管泵浦光学材料之一。本研究采用共沉淀法制备了不同Yb浓度(0.1-5%)的S-氟化铵粉末。然后采用热压烧结法制备了不同Yb含量的S-FAP透明陶瓷。通过对前驱体粉末和最终陶瓷的X射线衍射分析，证实了六方相Sr5(PO4)(3)F的晶相结构。粉末扫描电子显微镜分析表明，随着Yb3+浓度的增加，粉末的平均粒径和长径比逐渐减小。热蚀刻表面扫描电子显微镜显示，合成了平均晶粒度小于200 nm的纳米结构S-fap透明陶瓷。3%陶瓷在500和1100 nm波长的最高透过率分别为51%和79.78%。陶瓷横截面扫描电子显微镜表明，孔隙率是影响光学特性增强的主要散射源。测试和讨论了不同Yb浓度的S-FAP透明陶瓷的吸收、发射和荧光寿命，并给出了主峰对应的吸收截面和发射截面。给出了这组陶瓷样品的一些物理参数，包括热扩散率、比热容、热扩散率数据以及显微硬度。
The Sr-5(PO4)(3)F (S-FAP) crystal material is regarded as one of the most ideal optical materials for diode pumping owing to its huge absorption and emission cross sections and long fluorescence lifespan. In this investigation, S-FAP powders with varying Yb concentrations (0.1-5%) were produced using the coprecipitation method. Then a variety of S-FAP transparent ceramics with varying Yb content were fabricated using hot-pressing sintering. The crystalline phase structure of hexagonal Sr-5(PO4)(3)F was verified by XRD analysis of the precursor powder and the final ceramics. According to the powder SEM, the average grain size and the long axial-radial ratio of powders are decreasing as the Yb3+ concentration increases. Thermal-etched surface SEM reveals nanostructured S-FAP transparent ceramics with an average grain size of less than 200 nm were synthesized. The highest transmittances of the 3% ceramics at 500 and 1100 nm wavelengths are 51% and 79.78%, respectively. The ceramic cross-sectional SEM demonstrated that porosity is the primary scattering source influencing the enhancement of optical characteristics. The absorption, emission, and fluorescence lifetimes of S-FAP transparent ceramics with varying Yb concentrations were tested and discussed, and the absorption and emission cross sections corresponding to the major peak were reported. Some physical parameters of this set of ceramic samples were shown, including thermal diffusivity, specific heat capacity, and thermal diffusivity data, as well as micro-hardness.