Etude structurale de la forme ordonnée de LiAl5O8

Famery, R.; Queyroux, F.; Gilles, J.C.; Herpin, Paulette

doi:10.1016/0022-4596(79)90107-5

Cited by 58 publications

(31 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The ordered phase of LiAl 5 O 8 doped with transition metal ions, has received much attention and significant efforts have been devoted to the study of its optical properties [1][2][3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Exchange Charge Model for Fe³⁺:LiAl₅O₈

Vaida

Avram

2009

Acta Phys. Pol. A

View full text Add to dashboard Cite

The aim of this paper is the theoretical investigation of Fe 3+ doped in the ordered phase of LiAl 5 O 8 . We used the shell model and pair potential approximation to optimize the geometric structure of LiAl 5 O 8 . This approach enables the modeling of the crystal field parameters of LiAl 5 O 8 and then calculates the energy levels scheme of Fe 3+ ions doped in tetrahedral sites in the title crystal. Consistent crystal field analysis and the energy level splittings for LiAl 5 O 8 doped with Fe 3+ ions was performed in the frame of the exchange charge model of crystal field. The comparison of the theoretically obtained results for energy levels with the experimental data, yields satisfactory agreement and confirms the validity of the exchange charge model.

show abstract

Section: Introductionmentioning

confidence: 99%

“…These are located at the interstices of a close packed oxygen lattice which contains 64 sites having tetrahedral coordination and 32 sites having octahedral coordination [1].…”

Section: Introductionmentioning

confidence: 99%

Exchange Charge Model for Fe³⁺:LiAl₅O₈

Vaida

Avram

2009

Acta Phys. Pol. A

View full text Add to dashboard Cite

show abstract

“…3(e). The crystal structure of LiAl 5 O 8 is an inverse spinel with a cubic lattice (space group: P4332, lattice constant: a = 7.908 nm); 7) Li atoms and half of the Al atoms form sixcoordinated octahedra (LiO 6 and AlO 6 ) sharing their edges and the other Al atoms form four-coordinated tetrahedra (AlO 4 ) sharing corners of the octahedral. Here, strings consisting of edgesharing LiO 6 and AlO 6 octahedra are extended to [110] [dotted lines in Fig.…”

Section: Resultsmentioning

confidence: 99%

“…LiAl 5 O 8 is a promising material for catalysts and supports, and is a host material for rare-earth-free oxide phosphors. 1)8) The crystal structure of LiAl 5 O 8 is an inverse spinel with cubic lattice, 7) which has similarities to the spinel of the £-Al 2 O 3 catalyst. 8) Li 5 AlO 4 is known as a Li-ionic conductor in the Al 2 O 3 Li 2 O system, 9) whereas the Li-ion conduction of LiAl 5 O 8 has not been defined.…”

Section: Introductionmentioning

confidence: 99%

“…2),10), 11) Although LiAl 5 O 8 has been fabricated via melt-solidification 2), 7) and wet chemical processing, 5) the precise composition of LiAl 5 12) It is of importance to control the crystal orientation of LiAl 5 O 8 film for catalytic supports, because microstructures of catalytic materials could be affected by surface orientations of supports. 13) Chemical vapor deposition (CVD) is a versatile technique used to synthesize films with a variety of microstructures and oriented textures.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Oriented growth and electrical property of LiAl<sub>5</sub>O<sub>8</sub> film by laser chemical vapor deposition

Chen

Katsui

et al. 2016

J. Ceram. Soc. Japan

View full text Add to dashboard Cite

LiAl 5 O 8 films were prepared by laser chemical vapor deposition, and the effect of the deposition temperature (T dep ) on the orientation, microstructure, and deposition rate was investigated. In the T dep range of 9801040 K, highly (110)-oriented LiAl 5 O 8 film comprising flake-like grains elongated to [110] with flatter face of (111) formed at the maximum deposition rate of 70¯m h ¹1 . Above T dep = 1050 K, dense LiAl 5 O 8 films slightly oriented to (100) were deposited with faceted columnar grains of pyramidal and terrace shapes. The electrical properties of the LiAl 5 O 8 films were examined using AC impedance spectroscopy. The complex plane plots of the dense LiAl 5 O 8 film consisted of a semicircle associated with the bulk response and an inclined spike, suggesting the ionic conduction in the LiAl 5 O 8 film.

show abstract

Effect of Dopant Concentrations on the Luminescent Properties of LiAl₅O₈:Fe Phosphors

Silva

Nascimento

et al. 2021

Physica Status Solidi (b)

View full text Add to dashboard Cite

The structural and optical properties of pure and Fe‐doped LiAl5O8 are investigated using the modified sol–gel method, using anhydrous glucose as the polymerizing agent. The structural and optical properties are identified using X‐ray diffraction (XRD), scanning electron microscopy (SEM), photoluminescence (PL), and X‐ray excited optical luminescence (XEOL). The XRD diffraction patterns confirm the formation of a LiAl5O8 phase with different Fe concentrations. The effect of Fe3+ ions as a dopant on the luminescent properties of LiAl5O8 is studied and is discussed in detail. The results reveal a red emission upon excitation at 267 and 391 nm. A maximum emission intensity is observed for 1 mol% of Fe. PL and XEOL emission spectra exhibit 4T1g(4 G) → 6A1g(6S) and 4E1g + 6A1g(4 G) → 6A1g(6S) transitions typical of the Fe3+ ion. In addition, an 2 E → 4A2 transition centered at ≈714 nm is attributed to the presence of Cr3+ ions in the host lattice as a contaminant in starting materials. The coordinated Commission Internationale de l'Eclairage (CIE) is calculated from the emission spectra, and points to the possibility of applying this study as a red–pink emitting match.

show abstract

Etude structurale de la forme ordonnée de LiAl5O8

Cited by 58 publications

References 6 publications

Exchange Charge Model for Fe³⁺:LiAl₅O₈

Exchange Charge Model for Fe³⁺:LiAl₅O₈

Oriented growth and electrical property of LiAl<sub>5</sub>O<sub>8</sub> film by laser chemical vapor deposition

Effect of Dopant Concentrations on the Luminescent Properties of LiAl₅O₈:Fe Phosphors

Contact Info

Product

Resources

About

Etude structurale de la forme ordonnée de LiAl5O8

Cited by 58 publications

References 6 publications

Exchange Charge Model for Fe3+:LiAl5O8

Exchange Charge Model for Fe3+:LiAl5O8

Oriented growth and electrical property of LiAl<sub>5</sub>O<sub>8</sub> film by laser chemical vapor deposition

Effect of Dopant Concentrations on the Luminescent Properties of LiAl5O8:Fe Phosphors

Contact Info

Product

Resources

About

Exchange Charge Model for Fe³⁺:LiAl₅O₈

Exchange Charge Model for Fe³⁺:LiAl₅O₈

Effect of Dopant Concentrations on the Luminescent Properties of LiAl₅O₈:Fe Phosphors