Synthesis, crystal structure and luminescence in Ca3Al2O6

Mixed-phases of the undoped ZnAl2O4/ZnO/Ca5Al6O14 ( Z Z C ) a n d C e 3+ doped ZnAl2O4/ZnO/Ca5Al6O14/Ca3Al4ZnO10 (ZZCC:0.1% Ce 3+ ) were successfully prepared using the sol-gel method. The 0.1% Ce 3+ concentration was kept constant while the annealing temperature (Ta) was varied from 500 -1300 o C. X-ray diffraction (XRD) results showed that the prepared materials consist of the mixture of the cubic (ZnAl2O4), hexagonal wurzite (ZnO) and orthorhombic (Ca5Al6O14 and Ca3Al4ZnO10) crystal structures, which highly depends on the Ta. Energy dispersive x-ray spectroscopy (EDS) analysis confirmed the presence of all the expected elementary compositions. Scanning electron microscopy (SEM) results showed that varying the Ta does not influence the morphology of the prepared nanophosphor material. Transmission Electron Microscopy (TEM) confirmed that the prepared powders were in the nanoscale region. The photoluminescence (PL) results showed emission peaks located at 409, 488, 545, 589, 615, 695 and 785 nm, which were attributed to the intrinsic defects within ZZC mixed phases. There was no emission observed from the Ce 3+ transition. Optimum photoluminescence intensity was observed at the Ta = 600 °C. The commission Internationale de I'Eclairage coordinates (CIE) showed that the emission colour could be tuned by varying the Ta.

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“…Ca3Al2O6 [11] and Ca12Al14O33 [9] which have been reported. In this work, the focus is drawn on the Ca5Al6O14 and Ca3Al4ZnO10.…”

Section: Introductionmentioning

confidence: 62%

Effects of annealing temperature on the structure and photoluminescence properties of the ZnO/ZnAl2O4/Ca5Al6O14/Ca3Al4ZnO10:0.1% Ce3+ mixed-phases nanophosphor prepared by citrate sol–gel process

et al. 2020

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“…In Ca 3 Al 2 O 6 , whose formation is evident from the in situ HE - SXRD, the tetrahedral [AlO 4 ] rings are connected by Ca 2+ ions. As per the literature, six different Ca sites exist. Three of them, Ca(1–3), form subcell (A), and Ca(4–6) form subcell (B).…”

Section: Resultsmentioning

confidence: 95%

Unveiling Non-isothermal Crystallization of CaO–Al₂O₃–B₂O₃–Na₂O–Li₂O–SiO₂ Glass via In Situ X-ray Scattering and Raman Spectroscopy

et al. 2022

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The crystallization in glasses is a paradoxical phenomenon and scarcely investigated. This work explores the non-isothermal crystallization of a multicomponent alumino-borosilicate glass via in situ high-energy synchrotron X-ray diffraction, atomic pair distribution function, and Raman spectroscopy. Results depict the crystallization sequence as Ca 3 Al 2 O 6 and CaSiO 4 followed by LiAlO 2 with the final compound formation of Ca 3 B 2 O 6 . These precipitations occur in a narrow temperature range and overlap, resulting in a single exothermic peak in the differential scanning calorimetry thermogram. The concurrent nucleation of Ca 3 Al 2 O 6 and CaSiO 4 is intermediated by their corresponding hydrates, which have dominantly short-range order. Moreover, the crystallization of LiAlO 2 and Ca 3 B 2 O 6 is strongly linked with the changes of structural units during the incubation stage in non-isothermal heating. These findings clarify the crystallization of multicomponent glass, which have been inferred from ex situ reports but never evidenced via in situ studies.

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“…The absorption peaks at 3420 and 1603 cm À1 can be assigned to the stretching vibration and bending vibration of OH groups of H 2 O. 49 The bands at 1114 and 454 cm À1 can be attributed to the Fe-O stretching vibration modes in Fe 2 O 3 . This FTIR results indicate the formation of Fe 2 O 3 in the present outcome, which are reliably matched with XRD patterns.…”

Section: Characterization Results Of Synthesized Rhombohedral Fe 2 O mentioning

confidence: 99%

Hydrothermal synthesis, characterization and enhanced photocatalytic activity and toxicity studies of a rhombohedral Fe₂O₃nanomaterial

et al. 2019

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Synthesis, crystal structure and luminescence in Ca3Al2O6

Cited by 12 publications

References 21 publications

Effects of annealing temperature on the structure and photoluminescence properties of the ZnO/ZnAl2O4/Ca5Al6O14/Ca3Al4ZnO10:0.1% Ce3+ mixed-phases nanophosphor prepared by citrate sol–gel process

Effects of annealing temperature on the structure and photoluminescence properties of the ZnO/ZnAl2O4/Ca5Al6O14/Ca3Al4ZnO10:0.1% Ce3+ mixed-phases nanophosphor prepared by citrate sol–gel process

Unveiling Non-isothermal Crystallization of CaO–Al₂O₃–B₂O₃–Na₂O–Li₂O–SiO₂ Glass via In Situ X-ray Scattering and Raman Spectroscopy

Hydrothermal synthesis, characterization and enhanced photocatalytic activity and toxicity studies of a rhombohedral Fe₂O₃nanomaterial

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Synthesis, crystal structure and luminescence in Ca3Al2O6

Cited by 12 publications

References 21 publications

Effects of annealing temperature on the structure and photoluminescence properties of the ZnO/ZnAl2O4/Ca5Al6O14/Ca3Al4ZnO10:0.1% Ce3+ mixed-phases nanophosphor prepared by citrate sol–gel process

Effects of annealing temperature on the structure and photoluminescence properties of the ZnO/ZnAl2O4/Ca5Al6O14/Ca3Al4ZnO10:0.1% Ce3+ mixed-phases nanophosphor prepared by citrate sol–gel process

Unveiling Non-isothermal Crystallization of CaO–Al2O3–B2O3–Na2O–Li2O–SiO2 Glass via In Situ X-ray Scattering and Raman Spectroscopy

Hydrothermal synthesis, characterization and enhanced photocatalytic activity and toxicity studies of a rhombohedral Fe2O3nanomaterial

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Unveiling Non-isothermal Crystallization of CaO–Al₂O₃–B₂O₃–Na₂O–Li₂O–SiO₂ Glass via In Situ X-ray Scattering and Raman Spectroscopy

Hydrothermal synthesis, characterization and enhanced photocatalytic activity and toxicity studies of a rhombohedral Fe₂O₃nanomaterial