Fabrication and properties of transparent Nd‐doped BaF₂ ceramics

Abstract

Nd:BaF 2 nanoparticles have been prepared via co-precipitation and a pumping filtration wash method. The phase composition and morphology of the synthesized nanoparticles were investigated by X-Ray Diffraction (XRD) and Field Emission Scanning Electron Microscopy (FE-SEM) analyses, respectively. SEM observa-

High‐entropy transparent fluoride laser ceramics

“…As observed via SEM, it is likely that micropores are the main source of scattering losses in this material, the incidence of which can be significantly reduced by optimizing the sintering process or by applying an additional hot isostatic pressing treatment. The absorption bands present in the 350 to 900 nm wavelength region can be attributed to the electronic transitions of the Nd 3+ ion from their 4 I 9/2 ground state to various excited states, with the observed combination of absorption bands being similar to that observed in Nd‐doped CaF 2 and BaF 2 ceramics . The IR transmittance spectrum of the CNCSBF transparent ceramic sintered at 750°C is presented in Figure B; the transmittance reached a maximum of approximately 85% at a wavelength of 7 μm.…”

“…The absorption bands present in the 350 to 900 nm wavelength region can be attributed to the electronic transitions of the Nd 3+ ion from their 4 I 9/2 ground state to various excited states, with the observed combination of absorption bands being similar to that observed in Nd-doped CaF 2 and BaF 2 ceramics. 31,35 The IR transmittance spectrum of the CNCSBF transparent ceramic sintered at 750°C is presented in Figure 6B; the transmittance reached a maximum of approximately 85% at a wavelength of 7 μm.…”

“…Currently, fluoride materials see application in such areas as lasers, scintillators, windows, and ultraviolet (UV) and vacuum ultraviolet (VUV) lenses . The most widely studied fluoride transparent ceramics are CaF 2 , BaF 2 , and SrF 2 , which are often doped with various rare‐earth ions, depending on the specific application of the ceramic …”

“…25 The most widely studied fluoride transparent ceramics are CaF 2 , BaF 2 , and SrF 2 , which are often doped with various rare-earth ions, depending on the specific application of the ceramic. [26][27][28][29][30][31][32][33][34][35][36][37] With inspiration stemming from various research activities in the HEA and HEC communities and from the fundamental principles of thermodynamics, the present authors have extended this entropy concept to be applied to a five-component fluoride transparent ceramic. In this work, we demonstrate the fabrication of the first high-entropy fluoride transparent 2 | EXPERIMENTAL METHODS 2 , Alfa Aesar, 99.999%], and potassium fluoride (KF, Alfa Aesar, 99.99%).…”

“…A similar processing method was employed in a previous report by these authors on Nd:BaF 2 transparent ceramics. 35 The resulting precipitate suspension was subsequently aged for 24 hours at room temperature and the precipitate was washed 10 times with deionized water via a pumping filtration method to remove any traces of the starting solution as well as any other impurities. Next, the separated precipitates were dried in an oven at 80°C, ground using an agate mortar and pestle, and then calcined at 500°C for 5 hours in an argon atmosphere.…”