A new high-pressure phase of LiAlO2

Li, Xijun; Kobayashi, Takamichi; Zhang, Fuxiang; Kimoto, Koji; Sekine, Toshimori

doi:10.1016/j.jssc.2003.12.014

Cited by 28 publications

(18 citation statements)

References 18 publications

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“…a-LiAlO 2 can be synthesized at 3.5 GPa and 850 C; it crystallizes with a NaHF 2 structure. [31][32][33] Besides this high-pressure phase a monoclinic one 34 is known that can be obtained at an intermediate pressure and temperature.…”

Section: Resultsmentioning

confidence: 99%

Order vs. disorder—a huge increase in ionic conductivity of nanocrystalline LiAlO₂ embedded in an amorphous-like matrix of lithium aluminate

et al. 2014

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Section: Resultsmentioning

confidence: 99%

Order vs. disorder—a huge increase in ionic conductivity of nanocrystalline LiAlO₂ embedded in an amorphous-like matrix of lithium aluminate

et al. 2014

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“…According to Konar et al [5], LiAlO 2 comprises a tetragonal γ-phase (high temperature) and a cubic α-phase (low temperature) modification and LiAl 5 O 8 generally crystallizes in a spinel (high temperature) and a low temperature primitive cubic form [8]. According to Li et al [9], LiAlO 2 comprises four polymorphs: a tetragonal γ-phase, a rombohedral α-phase, an orthorhombic β-phase and two phases of high temperature.…”

Section: Important Binary Phase Systems Containing LImentioning

confidence: 99%

Li-Distribution in Compounds of the Li2O-MgO-Al2O3-SiO2-CaO System—A First Survey

Schirmer

Qiu

et al. 2020

Metals

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The recovery of critical elements in recycling processes of complex high-tech products is often limited when applying only mechanical separation methods. A possible route is the pyrometallurgical processing that allows transferring of important critical elements into an alloy melt. Chemical rather ignoble elements will report in slag or dust. Valuable ignoble elements such as lithium should be recovered out of that material stream. A novel approach to accomplish this is enrichment in engineered artificial minerals (EnAM). An application with a high potential for resource efficient solutions is the pyrometallurgical processing of Li ion batteries. Starting from comparatively simple slag compositions such as the Li-Al-Si-Ca-O system, the next level of complexity is reached when adding Mg, derived from slag builders or other sources. Every additional component will change the distribution of Li between the compounds generated in the slag. Investigations with powder X-Ray diffraction (PXRD) and electron probe microanalysis (EPMA) of solidified melt of the five-compound system Li2O-MgO-Al2O3- SiO2-CaO reveal that Li can occur in various compounds from beginning to the end of the crystallization. Among these compounds are Li1−x(Al1−xSix)O2, Li1−xMgy(Al)(Al3/2y+xSi2−x−3/2y)O6, solid solutions of Mg1−(3/2y)Al2+yO4/LiAl5O8 and Ca-alumosilicate (melilite). There are indications of segregation processes of Al-rich and Si(Ca)-rich melts. The experimental results were compared with solidification curves via thermodynamic calculations of the systems MgO-Al2O3 and Li2O-SiO2-Al2O3.

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“…For this purpose, we simulate ion irradiations on γ‐LiAlO 2 single crystals and nanocrystals. Tetragonal γ‐LiAlO 2 is one of the four known polymorphs of LiAlO 2 which includes hexagonal γ‐LiAlO 2 , monoclinic γ‐LiAlO 2 , and the high‐pressure phase γ‐LiAlO 2 . Readers interested in the selection of the γ‐phase for nuclear applications may refer to Ref .…”

Section: Introductionmentioning

confidence: 99%

Role of interfaces in damage process of irradiated lithium aluminate nanocrystals

Senor

Devanathan

2018

J Am Ceram Soc

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Molecular dynamics simulations were performed to understand the differences in the response of single crystal and nanocrystalline γ‐LiAlO2 to energy deposition by 10 keV Li recoils. The simulations are performed at 573 K and focus on the damage production in the absence of thermal annealing. The grain boundaries in the nanocrystals are found to be amorphous. Analyses of the fate of the beam ions show that the amorphous grain boundaries and differently oriented nanograins increase the number of backscattered ions and decrease the number of transmitted ions. Damaged regions protruding from the grain boundaries provide a direct evidence of the role of the grain boundaries as scattering centers in collision cascades. The simulations show that the defect density produced in the nanocrystals is about twice that in the single crystals. In both samples, Li defects account for 70% of the defects, demonstrating that LiO4 tetrahedra are much more susceptible to damage than AlO4 tetrahedra. Furthermore, Li defects occur preferentially near grain boundaries. Diffusion simulations confirm the limited thermal diffusion of defects at 573 K, effectively separating the damage production from thermal annealing in the irradiation simulations. Nevertheless, the mean square displacements of grain‐boundary defects are found to be larger than lattice defects and surface defects.

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A new high-pressure phase of LiAlO2

Cited by 28 publications

References 18 publications

Order vs. disorder—a huge increase in ionic conductivity of nanocrystalline LiAlO₂ embedded in an amorphous-like matrix of lithium aluminate

Order vs. disorder—a huge increase in ionic conductivity of nanocrystalline LiAlO₂ embedded in an amorphous-like matrix of lithium aluminate

Li-Distribution in Compounds of the Li2O-MgO-Al2O3-SiO2-CaO System—A First Survey

Role of interfaces in damage process of irradiated lithium aluminate nanocrystals

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A new high-pressure phase of LiAlO2

Cited by 28 publications

References 18 publications

Order vs. disorder—a huge increase in ionic conductivity of nanocrystalline LiAlO2 embedded in an amorphous-like matrix of lithium aluminate

Order vs. disorder—a huge increase in ionic conductivity of nanocrystalline LiAlO2 embedded in an amorphous-like matrix of lithium aluminate

Li-Distribution in Compounds of the Li2O-MgO-Al2O3-SiO2-CaO System—A First Survey

Role of interfaces in damage process of irradiated lithium aluminate nanocrystals

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Order vs. disorder—a huge increase in ionic conductivity of nanocrystalline LiAlO₂ embedded in an amorphous-like matrix of lithium aluminate

Order vs. disorder—a huge increase in ionic conductivity of nanocrystalline LiAlO₂ embedded in an amorphous-like matrix of lithium aluminate