Perfectly transparent pore-free Nd3+-doped Sr9GdF21 polycrystalline ceramics elaborated from single-crystal ceramization |
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| Affiliation: | 1. College of Aeronautics and Astronautics, Sichuan University, Chengdu 610064, China;2. College of Architecture and Civil Engineering, XHU University, Chengdu 611930, China;3. College of Physics and Electronic Engineering, Sichuan Normal University, Chengdu 610101, China;4. College of Physical Science and Technology, Sichuan University, Chengdu 610064, China;5. Université Paris Ouest Nanterre La Défense, 50 Rue de Sèvres, 92410 Ville d''Avray, France;6. School of Mechanical Engineering, Chengdu University, Chengdu 610106, China |
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| Abstract: | An Nd3+-doped Sr9GdF21 (SGF) transparent pore-free polycrystalline ceramic is produced by the ceramization of single crystals. The average transmittance (TA) of the Nd3+-doped SGF ceramic (8-mm thick) is about 90.6% in the visible region and more than 92% in the near-IR region. The fracture toughness of the Nd3+-doped SGF ceramic is up to 1.28 MPa m1/2, which is significantly higher than that of similar types of ceramics. Gd3+ ions, acting as both buffer ions and pinning ions, effectively improve the optical and mechanical properties of the SGF ceramic, implying that the sample is a promising candidate for high-power lasers. Moreover, the SGF ceramic shows a high mid- and far-infrared (up to 9 μm) transmittance, low phonon energy, and high density (ρ = 4.8466 g/cm3), which pave the way for a wide range of applications such as infrared windows, mid- and far-infrared lasers, scintillators, and in photonics. |
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| Keywords: | Ceramization of single crystals Polycrystalline transparent ceramics |
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