Synthesis, structure and luminescence properties of phosphates A1−3x Eu x Zr2(PO4)3 (A—alkali metal)

Канунов, А. Е.; Glorieux, Benoît; Орлова, А. И.; Borovikova, E. Yu.; Zavedeeva, Galina

doi:10.1007/s12034-016-1337-1

Cited by 9 publications

(4 citation statements)

References 20 publications

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“…26. Sodium zirconium phosphate (NZP) [17,18,19,20,21,22,23,24,87,89,155,209,211,293,379,380,381,382,383,384,385,386,387,388,389,390,391,392,393,394,395,396,397,398,399,400,401,402,403,404,405,406,407,408,409,410,411,412,413,414,415,416], Figure 26.…”

Section: Crystalline Ceramic Phasementioning

confidence: 99%

“…Many of the compounds listed here have been studied and continue to be actively investigated by researchers led by the co-author of this work (Prof Orlova), including those with structures of garnet [185,189,190,191,192,193,194], P-pollucite [205,206,207,208,209,210,211,212,213,214,215], pollucite [214,215,293], monazite [141,352], sodium zirconium phosphate (NZP) [21,209,383,384,388,392,393,394,396,405,407,408,409,412,413,414,415,416,417,418,419], langbeinite [416,417,418,419], whitlockite [87,89,424,425,426,427,428,429,430] and scheelite [89,445,446]. Overall crystalline ceramics are characterized as much more durable compared with glasses of the same chemical compo...…”

Section: Summary Of Crystalline Ceramic Waste-formsmentioning

confidence: 99%

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Ceramic Mineral Waste-Forms for Nuclear Waste Immobilization

2019

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Crystalline ceramics are intensively investigated as effective materials in various nuclear energy applications, such as inert matrix and accident tolerant fuels and nuclear waste immobilization. This paper presents an analysis of the current status of work in this field of material sciences. We have considered inorganic materials characterized by different structures, including simple oxides with fluorite structure, complex oxides (pyrochlore, murataite, zirconolite, perovskite, hollandite, garnet, crichtonite, freudenbergite, and P-pollucite), simple silicates (zircon/thorite/coffinite, titanite (sphen), britholite), framework silicates (zeolite, pollucite, nepheline /leucite, sodalite, cancrinite, micas structures), phosphates (monazite, xenotime, apatite, kosnarite (NZP), langbeinite, thorium phosphate diphosphate, struvite, meta-ankoleite), and aluminates with a magnetoplumbite structure. These materials can contain in their composition various cations in different combinations and ratios: Li–Cs, Tl, Ag, Be–Ba, Pb, Mn, Co, Ni, Cu, Cd, B, Al, Fe, Ga, Sc, Cr, V, Sb, Nb, Ta, La, Ce, rare-earth elements (REEs), Si, Ti, Zr, Hf, Sn, Bi, Nb, Th, U, Np, Pu, Am and Cm. They can be prepared in the form of powders, including nano-powders, as well as in form of monolith (bulk) ceramics. To produce ceramics, cold pressing and sintering (frittage), hot pressing, hot isostatic pressing and spark plasma sintering (SPS) can be used. The SPS method is now considered as one of most promising in applications with actual radioactive substances, enabling a densification of up to 98–99.9% to be achieved in a few minutes. Characteristics of the structures obtained (e.g., syngony, unit cell parameters, drawings) are described based upon an analysis of 462 publications.

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Section: Crystalline Ceramic Phasementioning

confidence: 99%

Section: Summary Of Crystalline Ceramic Waste-formsmentioning

confidence: 99%

Ceramic Mineral Waste-Forms for Nuclear Waste Immobilization

2019

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“…Owing to the wide isomorphism characteristic of the NaZr 2 (PO 4 ) 3 (NZP) structure [1][2][3], structural analogs of NZP are of interest for designing new inorganic materials for a variety of purposes: radioactive waste consolidation [4,5], minor actinide transmutation [6,7], thermally stable ceramics [8,9], ionic conductors [10,11], phosphors [12,13], and other applications.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Thermal Expansion of Calcium Iron Zirconium Phosphates with the NaZr2(PO4)3 Structure

et al. 2018

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Ca 0.5(1+x) Zr 2-x Fe x (PO 4) 3 phosphates have been synthesized by a sol-gel process. The individual compounds and solid solutions obtained crystallize in the NaZr 2 (PO 4) 3 structure (trigonal symmetry, sp. gr. R3). Using high-temperature X-ray diffraction, we have determined their thermal expansion parameters in the temperature range from 25 to 800°C. With increasing x, the magnitudes of their linear thermal expansion coefficients and thermal expansion anisotropy decrease. Most of the synthesized phosphates can be rated as low-thermal-expansion compounds and can be regarded as materials capable of withstanding thermal "stress."

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“…Compounds that are structural analogs of NaZr 2 (PO 4 ) 3 (NZP) are promising as key components of materials with tailored physicochemical properties. Wellknown members of this family possess high thermal and chemical stability, radiation resistance [1,2], and ionic conductivity [3][4][5]; good catalytic [6] and luminescent properties [7,8]; and low thermal expansion [9][10][11]. There is ample evidence that they can be used to produce essentially pore-free ceramic materials with good physicomechanical properties [2,[12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Preparation of NZP-Type Ca0.75 + 0.5xZr1.5Fe0.5(PO4)3 –x(SiO4)x Powders and Ceramic, Thermal Expansion Behavior

et al. 2018

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Ca 0.75+0.5x Zr 1.5 Fe 0.5 (PO 4 ) 3-x (SiO 4 ) x (x = 0-0.5) solid solutions have been synthesized by a sol-gel process and characterized by X-ray diffraction, IR spectroscopy, and differential scanning calorimetry. As expected, the synthesized phosphatosilicates crystallize in a NaZr 2 (PO 4 ) 3 -type structure (trigonal symmetry, sp. gr. R3 c). The thermal expansion of the solid solutions has been studied by high-temperature Xray diffraction in the temperature range from 25 to 800°C. Their thermal expansion parameters have been calculated and analyzed as functions of composition. Highdensity ceramics based on the Ca 0.875 Zr 1.5 Fe 0.5 (PO 4 ) 2.75 (SiO 4 ) 0.25 phosphatosilicate have been produced by spark plasma sintering and their structure and properties have been studied in detail. CONCLUSIONSCa 0.75+0.5x Zr 1.5 Fe 0.5 (PO 4 ) 3-x (SiO 4 ) x (x = 0-0.5) solid solutions isostructural with NaZr 2 (PO 4 ) 3 have been synthesized and characterized. According to the present high-temperature X-ray diffraction data obtained in the range 25-800°C, their lattice parameters a and c are linear functions of temperature: heating reduces the a cell parameter and increases c. The incorporation of silicate groups has been shown to lead to a sharp decrease in the absolute value of a-axis thermal expansion coefficient and a slight increase in the c-axis coefficient. The Ca 0.875 Zr 1.5 Fe 0.5 (PO 4 ) 2.75 (SiO 4 ) 0.25 (x = 0.25) and CaZr 1.5 Fe 0.5 (PO 4 ) 2.5 (SiO 4 ) 0.5 (x = 0.5) phosphatosilicates have intermediate thermal expansion coefficients: 2 × 10 -6 ≤ α av ≤ 8 × 10 -6°C-1 .The observed general trends in the effect of anion substitutions in the framework on the thermal expansion of NaZr 2 (PO 4 ) 3 -type compounds can be helpful in engineering materials with tailored thermal expansion parameters.Using one composition as an example, we have demonstrated the possibility of producing ceramic samples with high relative density (~99.7%) and high mechanical strength by SPS. ACKNOWLEDGMENTSThis work was supported by the Russian Science Foundation, project no. 16-13-10464: Advanced ceramic like mineral materials with improved and adjustable service characteristics: design, synthesis, study.

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Synthesis, structure and luminescence properties of phosphates A1−3x Eu x Zr2(PO4)3 (A—alkali metal)

Cited by 9 publications

References 20 publications

Ceramic Mineral Waste-Forms for Nuclear Waste Immobilization

Ceramic Mineral Waste-Forms for Nuclear Waste Immobilization

Preparation and Thermal Expansion of Calcium Iron Zirconium Phosphates with the NaZr2(PO4)3 Structure

Preparation of NZP-Type Ca0.75 + 0.5xZr1.5Fe0.5(PO4)3 –x(SiO4)x Powders and Ceramic, Thermal Expansion Behavior

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