Vibrational and luminescent properties of polycrystalline zircon: Effect of structural and impurity defects

Merkulov, O.V.; Shchapova, Yu. V.; Uporova, N. S.; Zamyatin, D. A.; Markov, A.A.; Votyakov, S. L.

doi:10.1016/j.jssc.2020.121783

Cited by 7 publications

(5 citation statements)

References 51 publications

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“…This peak may be attributed to impurity ions in our samples such as Fe 3+ and Ti 3+ (see table 2) , which can substitute into the dodecahedral and tetrahedral sites of the zircon structure, resulting in emission peaks at longer wavelengths. These PL patterns are similar to those of zircon reported by Merkulov et al [30], where the Zr main peak is surrounded by two peaks due to impurities.…”

Section: Optical Properties Of Zircon Powderssupporting

confidence: 89%

“…The observed increase in luminescence in our zircon nanopowders may be attributed to a higher density of luminescent centres within the band gap structure of zircon's crystal structure. These centres often arise from unique defect structures, such as oxygen vacancies and interstitial defects in the crystal lattice, which are known to facilitate efficient radiative recombination [30,31]. Furthermore, the enhanced luminescence observed could result from the dissolution process employed during synthesis.…”

Section: Optical Properties Of Zircon Powdersmentioning

confidence: 99%

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Structural and optical characterizations of zircon and zirconia nanopowders derived from zircon sands

Pratama,

Hariyanto,

Purwaningsih

et al. 2024

Phys. Scr.

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This study explores the structural and optical properties of zircon (ZrSiO4) and zirconia (ZrO2) nanopowders using two types of natural Indonesian zircon sands. The former powders were synthesized through dissolution and non-dissolution methods, while the latter powders were synthesized using alkali fusion and co-precipitation techniques. X-ray fluorescence (XRF) analysis revealed a reduction in impurities post-synthesis. X-ray diffraction (XRD) and Scanning Electron Microscopy (SEM) analyses indicated that the dissolution process yielded pure zircon, whereas the non-dissolution method resulted in the presence of minor additional phases. For zirconia, all samples exhibited a tetragonal phase, albeit with varying structures. Optical properties were investigated using UV-Vis spectroscopy, which showed that both materials exhibit high absorption in the ultraviolet region, with slight differences in wavelengths peak. Consequently, zircon and zirconia demonstrated similar band gap energies ranging from 3.76 to 3.95 eV and 3.99 to 4.06 eV, respectively. Photoluminescence testing further revealed identical emission peaks 350 nm for both materials, highlighting their comparable optical characteristics. This study provides valuable understandings into the synthesis and optical properties of zircon and zirconia nanopowders derived from Indonesian zircon sands, emphasizing their potential applications in various optical and electronic fields.

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Section: Optical Properties Of Zircon Powderssupporting

confidence: 89%

Section: Optical Properties Of Zircon Powdersmentioning

confidence: 99%

Structural and optical characterizations of zircon and zirconia nanopowders derived from zircon sands

Pratama,

Hariyanto,

Purwaningsih

et al. 2024

Phys. Scr.

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“…The unit‐cell parameters

a

c

and the

c false/ a

ratio of the Mud Tank sample are close to those for well‐crystallized synthetic ZrSiO 4 . [ 48 ] An increase in the lattice constants of the SLZ2 sample as compared with the Mud Tank sample indicates the radiation damage of the structure according to Murakami et al [ 9 ] ; the increase in the

c false/ a

ratio specifies the fact of the partial thermal recovery of the structure during geological history. [ 49 ]…”

Section: Samplesmentioning

confidence: 99%

“…The unit-cell parameters a, c and the c=a ratio of the Mud Tank sample are close to those for wellcrystallized synthetic ZrSiO 4 . [48] An increase in the lattice constants of the SLZ2 sample as compared with the Mud Tank sample indicates the radiation damage of the structure according to Murakami et al [9] ; the increase in the c=a ratio specifies the fact of the partial thermal recovery of the structure during geological history. [49] Raman spectra of the SLZ2 and SLZ3 samples exhibit the broadening of spectral lines, which is the greatest for the SLZ3 sample, as compared with the reference crystalline zircon Mud Tank (Figure 2).…”

mentioning

confidence: 99%

Structural characteristics of radiation‐amorphized ZrSiO₄:U,Th according to Raman spectroscopy of Boson peak

Shchapova

Крылов

Votyakov

2023

J Raman Spectroscopy

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The structure of the amorphous fraction and the tensile-compressive stresses in amorphous-crystalline radiation-damaged zircon ZrSiO:U,Th depending on radiation dose and temperature (8-350 K) are investigated according to Raman spectroscopy of Boson peak for the first time. The Boson peak at 60-70 cm À1 associated with localized phonon states in the amorphous fraction ( f a ) is recorded at low temperatures (T < 100 K) for samples with f a < 30% and over the entire temperature range 8-350 K for f a > 70%. The wider localized states distribution in the latter case is considered as a sign of the amorphous phase structure evolution with an increase in radiation dose. The estimates of an atomic correlation radius based on the Ioffe-Regel criterion are similar to those in glasses, R c 2:0 À 2:3 nm. The monotonic increase in R c value during heating of zircon with f a > 70% is governed by thermal expansion of the percolating amorphous fraction. The nonmonotonic variations of the R c value in zircon with f a < 30% is determined by the stresses in the amorphous fraction due to the mismatch in thermal expansion coefficient (CTE) and elastic moduli of the amorphous and crystalline phases depending on temperature; a change in the sign of the crystalline fraction CTE at 30 K is assumed. The Boson peak disappearance at 100 K in zircon with f a < 30% during heating conforms to with the violation of the phonon localization as a consequence of amorphous fraction contraction and partial ordering. The data obtained are important for predicting the thermal and mechanical properties of heterogeneous radiationdamaged materials and nanocomposites.

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“…Among the available alternatives, zircon (ZrSiO 4 ), a combination ZrO 2 and SiO 2 that possesses the prominent features of high refractive index, hardness, low thermal expansion coefficient and high melting point is considered a better choice 3 . Moreover, the ability of ZrSiO 4 structure to host a variety of substitutions with impact on its final properties provides an opportunity to design multifunctional biomaterials with tailored performance for specific applications 4–8 …”

Section: Introductionmentioning

confidence: 99%

Synthesis, characterization, mechanical and magnetic characteristics of Gd³⁺/PO₄³⁻ substituted zircon for application in hard tissue replacements

Alam,

Vijayalakshmi

et al. 2023

J Biomed Mater Res

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The study reports on the use of sol–gel technique to yield zircon type [Zr(1–0.1–x) GdxTi0.1] [(SiO4)1–x(PO4)x] solid solution. Titanium has been used as a mineralizer to trigger zircon formation while equimolar concentrations of Gd3+ and PO43− were added to determine their accommodation limits in the zircon structure. The crystallization of t‐ZrO2 as a dominant phase alongside the crystallization of m‐ZrO2 and zircon were detected at 1200°C while their further annealing revealed the formation of zircon as a major phase at 1300°C. Heat treatment at 1400°C revealed the formation of zircon‐type solid solution [Zr(1–0.1‐x)GdxTi0.1][(SiO4)1−x(PO4)x] comprising the accommodation of 10 mol.% of Gd3+/PO43− at the zircon lattice. Beyond 10 mol.% of Gd3+/PO43−, the crystallization of GdPO4 as a secondary phase is noticed. Structural analysis revealed the expansion of zircon lattice due to the simultaneous occupancy of Gd3+/PO43− for the corresponding Zr4+/SiO44− sites. The mechanical strength of single‐phase zircon solid solution was higher in comparison to that of multiphase materials, namely in the presence of GdPO4 formed as a secondary phase in samples with added equimolar Gd3+/PO43− contents beyond 10 mol.%. Nevertheless, the paramagnetic behavior of the samples demonstrated a steady surge as a function of enhanced Gd3+ content.

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Vibrational and luminescent properties of polycrystalline zircon: Effect of structural and impurity defects

Cited by 7 publications

References 51 publications

Structural and optical characterizations of zircon and zirconia nanopowders derived from zircon sands

Structural and optical characterizations of zircon and zirconia nanopowders derived from zircon sands

Structural characteristics of radiation‐amorphized ZrSiO₄:U,Th according to Raman spectroscopy of Boson peak

Synthesis, characterization, mechanical and magnetic characteristics of Gd³⁺/PO₄³⁻ substituted zircon for application in hard tissue replacements

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Vibrational and luminescent properties of polycrystalline zircon: Effect of structural and impurity defects

Cited by 7 publications

References 51 publications

Structural and optical characterizations of zircon and zirconia nanopowders derived from zircon sands

Structural and optical characterizations of zircon and zirconia nanopowders derived from zircon sands

Structural characteristics of radiation‐amorphized ZrSiO4:U,Th according to Raman spectroscopy of Boson peak

Synthesis, characterization, mechanical and magnetic characteristics of Gd3+/PO43− substituted zircon for application in hard tissue replacements

Contact Info

Product

Resources

About

Structural characteristics of radiation‐amorphized ZrSiO₄:U,Th according to Raman spectroscopy of Boson peak

Synthesis, characterization, mechanical and magnetic characteristics of Gd³⁺/PO₄³⁻ substituted zircon for application in hard tissue replacements