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Belov AA, Shichalin OO, Papynov EK, Buravlev IY, Portnyagin AS, Azon SA, Fedorets AN, Vornovskikh AA, Kolodeznikov ES, Gridasova EA, Pogodaev A, Kondrikov NB, Shi Y, Tananaev IG. An SPS-RS Technique for the Fabrication of SrMoO 4 Powellite Mineral-like Ceramics for 90Sr Immobilization. MATERIALS (BASEL, SWITZERLAND) 2023; 16:5838. [PMID: 37687531 PMCID: PMC10489041 DOI: 10.3390/ma16175838] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/12/2023] [Revised: 08/04/2023] [Accepted: 08/22/2023] [Indexed: 09/10/2023]
Abstract
This paper reports a method for the fabrication of mineral-like SrMoO4 ceramics with a powellite structure, which is promising for the immobilization of the high-energy 90Sr radioisotope. The reported method is based on the solid-phase "in situ" interaction between SrO and MoO3 oxides initiated under spark plasma sintering (SPS) conditions. Dilatometry, XRD, SEM, and EDX methods were used to investigate the consolidation dynamics, phase formation, and structural changes in the reactive powder blend and sintered ceramics. The temperature conditions for SrMoO4 formation under SPS were determined, yielding ceramics with a relative density of 84.0-96.3%, Vickers microhardness of 157-295 HV, and compressive strength of 54-331 MPa. Ceramic samples demonstrate a low Sr leaching rate of 10-6 g/cm2·day, indicating a rather high hydrolytic stability and meeting the requirements of GOST R 50926-96 imposed on solid radioactive wastes. The results presented here show a wide range of prospects for the application of ceramic matrixes with the mineral-like composition studied here to radioactive waste processing and radioisotope manufacturing.
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Affiliation(s)
- Anton A. Belov
- Nuclear Technology Laboratory, Department of Nuclear Technology, Institute of High Technologies and Advanced Materials, Far Eastern Federal University, 10 Ajax Bay, Russky Island, 690922 Vladivostok, Russia (E.K.P.); (I.Y.B.); (A.S.P.); (S.A.A.); (A.N.F.); (A.A.V.); (A.P.); (N.B.K.)
| | - Oleg O. Shichalin
- Nuclear Technology Laboratory, Department of Nuclear Technology, Institute of High Technologies and Advanced Materials, Far Eastern Federal University, 10 Ajax Bay, Russky Island, 690922 Vladivostok, Russia (E.K.P.); (I.Y.B.); (A.S.P.); (S.A.A.); (A.N.F.); (A.A.V.); (A.P.); (N.B.K.)
| | - Evgeniy K. Papynov
- Nuclear Technology Laboratory, Department of Nuclear Technology, Institute of High Technologies and Advanced Materials, Far Eastern Federal University, 10 Ajax Bay, Russky Island, 690922 Vladivostok, Russia (E.K.P.); (I.Y.B.); (A.S.P.); (S.A.A.); (A.N.F.); (A.A.V.); (A.P.); (N.B.K.)
| | - Igor Yu. Buravlev
- Nuclear Technology Laboratory, Department of Nuclear Technology, Institute of High Technologies and Advanced Materials, Far Eastern Federal University, 10 Ajax Bay, Russky Island, 690922 Vladivostok, Russia (E.K.P.); (I.Y.B.); (A.S.P.); (S.A.A.); (A.N.F.); (A.A.V.); (A.P.); (N.B.K.)
| | - Arseniy S. Portnyagin
- Nuclear Technology Laboratory, Department of Nuclear Technology, Institute of High Technologies and Advanced Materials, Far Eastern Federal University, 10 Ajax Bay, Russky Island, 690922 Vladivostok, Russia (E.K.P.); (I.Y.B.); (A.S.P.); (S.A.A.); (A.N.F.); (A.A.V.); (A.P.); (N.B.K.)
| | - Semen A. Azon
- Nuclear Technology Laboratory, Department of Nuclear Technology, Institute of High Technologies and Advanced Materials, Far Eastern Federal University, 10 Ajax Bay, Russky Island, 690922 Vladivostok, Russia (E.K.P.); (I.Y.B.); (A.S.P.); (S.A.A.); (A.N.F.); (A.A.V.); (A.P.); (N.B.K.)
| | - Alexander N. Fedorets
- Nuclear Technology Laboratory, Department of Nuclear Technology, Institute of High Technologies and Advanced Materials, Far Eastern Federal University, 10 Ajax Bay, Russky Island, 690922 Vladivostok, Russia (E.K.P.); (I.Y.B.); (A.S.P.); (S.A.A.); (A.N.F.); (A.A.V.); (A.P.); (N.B.K.)
| | - Anastasia A. Vornovskikh
- Nuclear Technology Laboratory, Department of Nuclear Technology, Institute of High Technologies and Advanced Materials, Far Eastern Federal University, 10 Ajax Bay, Russky Island, 690922 Vladivostok, Russia (E.K.P.); (I.Y.B.); (A.S.P.); (S.A.A.); (A.N.F.); (A.A.V.); (A.P.); (N.B.K.)
| | - Erhan S. Kolodeznikov
- Nuclear Technology Laboratory, Department of Nuclear Technology, Institute of High Technologies and Advanced Materials, Far Eastern Federal University, 10 Ajax Bay, Russky Island, 690922 Vladivostok, Russia (E.K.P.); (I.Y.B.); (A.S.P.); (S.A.A.); (A.N.F.); (A.A.V.); (A.P.); (N.B.K.)
| | - Ekaterina A. Gridasova
- Nuclear Technology Laboratory, Department of Nuclear Technology, Institute of High Technologies and Advanced Materials, Far Eastern Federal University, 10 Ajax Bay, Russky Island, 690922 Vladivostok, Russia (E.K.P.); (I.Y.B.); (A.S.P.); (S.A.A.); (A.N.F.); (A.A.V.); (A.P.); (N.B.K.)
| | - Anton Pogodaev
- Nuclear Technology Laboratory, Department of Nuclear Technology, Institute of High Technologies and Advanced Materials, Far Eastern Federal University, 10 Ajax Bay, Russky Island, 690922 Vladivostok, Russia (E.K.P.); (I.Y.B.); (A.S.P.); (S.A.A.); (A.N.F.); (A.A.V.); (A.P.); (N.B.K.)
| | - Nikolay B. Kondrikov
- Nuclear Technology Laboratory, Department of Nuclear Technology, Institute of High Technologies and Advanced Materials, Far Eastern Federal University, 10 Ajax Bay, Russky Island, 690922 Vladivostok, Russia (E.K.P.); (I.Y.B.); (A.S.P.); (S.A.A.); (A.N.F.); (A.A.V.); (A.P.); (N.B.K.)
| | - Yun Shi
- Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 201899, China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Ivan G. Tananaev
- Nuclear Technology Laboratory, Department of Nuclear Technology, Institute of High Technologies and Advanced Materials, Far Eastern Federal University, 10 Ajax Bay, Russky Island, 690922 Vladivostok, Russia (E.K.P.); (I.Y.B.); (A.S.P.); (S.A.A.); (A.N.F.); (A.A.V.); (A.P.); (N.B.K.)
- Tananaev Institute of Chemistry and Technology of Rare Elements and Mineral Raw Materials, Kola Science Center, Russian Academy of Sciences, Akademgorodok, 26a, 184209 Apatity, Russia
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Optical Properties of Yttria-Stabilized Zirconia Single-Crystals Doped with Terbium Oxide. CRYSTALS 2022. [DOI: 10.3390/cryst12081081] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
A series of yttria-stabilized zirconia single-crystals doped with 0.000–0.250 mol% Tb4O7 was prepared by the optical floating-zone method. As shown by XRD and Raman spectroscopy, all of the crystals had a cubic-phase structure. These were initially orange–yellow in color, which is indicative of the presence of Tb4+ ions, but they then became colorless after being annealed in a H2/Ar atmosphere as a result of the reduction of Tb4+ to Tb3+. The absorption spectra of the unannealed samples show both the 4f 8→4f 75d1 transition of Tb3+ ions and the Tb4+ charge-transfer band. In addition, the transmittance of the crystals was increased by annealing. Under irradiation with 300 nm of light, all of the single-crystal samples showed seven emission peaks in the visible region, corresponding to the decay from the 5D3,4 excited state of Tb3+ to the 7FJ (J = 6–0) states. The most intense emission was at 544 nm, which corresponds to the typical strong green emission from the 5D4→7F5 transition in Tb3+ ions.
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Room Temperature Synthesis of Various Color Emission Rare-Earth Doped Strontium Tungstate Phosphors Applicable to Fingerprint Identification. CRYSTALS 2022. [DOI: 10.3390/cryst12070915] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Crystalline SrWO4 was synthesized at room temperature using a co-precipitation method. To use the SrWO4 as a phosphor, green and red phosphors were synthesized by doping with Tb3+ and Eu3+ rare earth ions. The synthesized samples had a tetragonal structure, and the main peak (112) phase was clearly observed. When the sample was excited using the absorption peak observed in the ultraviolet region, SrWO4:Tb3+ showed an emission spectrum of 544 nm, and SrWO4:Eu3+ showed an emission spectrum of 614 nm. When Tb3+ and Eu3+ ions were co-doped to realize various colors, a yellow-emitting phosphor was realized as the doping concentration of Eu3+ ions increased. When the synthesized phosphor was scattered on a glass substrate with fingerprints, as used in the field of fingerprint recognition, the fingerprint was revealed by green, red, and yellow emissions in response to a UV lamp.
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