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Synthesis and spectral-luminescent properties of La1-xPrxGa0.5Sb1.5O6 solid solutions
Affiliation:1. Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninskii Pr. 31, Moscow, 119991, Russia;2. National Research Mordovia State University, 68 Bolshevistskaya Str., Saransk, 430005, Republic of Mordovia, Russia;1. Kazakh-Russian International University, Aktobe, Kazakhstan;2. The Institute of Nuclear Physics of the Republic of Kazakhstan, Almaty, Kazakhstan;3. L.N. Gumilyov Eurasian National University, Nur-Sultan, Kazakhstan;4. Ural Federal University, Yekaterinburg, Russia;5. SSPA “Scientific and Practical Materials Research Centre of the NAS of Belarus”, 220072, Minsk, Belarus;1. School of Applied Physics, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor, Malaysia;2. Malaysia Nuclear Agency, Bangi, 43000, Kajang, Selangor, Malaysia;1. National Engineering Research Center of Electromagnetic Radiation Control Materials, University of Electronic Science and Technology of China, Chengdu, China, 610054;2. Key Laboratory of Multi-Spectral Absorbing Materials and Structures of Ministry of Education, University of Electronic Science and Technology of China, Chengdu, China, 610054;1. The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan, 430081, China;2. National-provincial Joint Engineering Research Center of High Temperature Materials and Lining Technology, Wuhan University of Science and Technology, Wuhan, 430081, China;1. Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Andalas, Kampus Limau Manis, Padang, 25163, Indonesia;2. Department of Physics, Faculty of Mathematics and Natural Sciences, Universitas Negeri Malang, Jl. Semarang 5, Malang, 65145, Indonesia;3. Division of Inorganic and Physical Chemistry, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung, Jl. Ganesha 10, Bandung, 40132, Indonesia;4. Research Center for Nanoscience and Nanotechnology, Institut Teknologi Bandung, Jl. Ganesha 10, Bandung, 40132, Indonesia;5. Department of Chemistry, Faculty of Science and Technology, Universitas Islam Negeri Maulana Malik Ibrahim Malang, Jl. Gajayana 50, Malang, 65144, Indonesia;6. Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG, Groningen, the Netherlands
Abstract:The series of La1-xPrxGa0.5Sb1.5O6 solid solutions (x = 0–1) with PbSb2O6 structure was synthesized. The comparative study of the La1-xPrxGa0.5Sb1.5O6 morphology showed all compounds have net microstructures. Herein the Pr concentration increasing leads to particles size decreasing from 400 up to 200 nm in the samples with low Pr content and to recrystallization and coarsening of the particles in Pr-rich ones. Using LaGa0.5Sb1.5O6 as an example, it was shown that the compounds have a wide transmission region in the visible and IR spectral ranges and are characterized by a low-energy phonon spectrum. An analysis of the spectral-luminescent characteristics revealed the presence of a cross-relaxation process (1D21G4) → (3H43F4) of Pr3+ ions for La1-xPrxGa0.5Sb1.5O6 at x ≥ 0.07. It was showed that a broadband radiation of thermal nature is observed under laser excitation with λ = 457 nm and a power density of J = 4.65 kW/cm2 for the samples with high (x = 0.4–1) praseodymium content.
Keywords:Spectroscopy  Optical properties  Layered antimonates
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