Transformation of the corundum structure upon high-temperature reduction

Dan’ko, A. Ya.; Rom, Monika; Sidelnikova, N. S.; Nizhankovskiy, S. V.; Budnikov, A. T.; Grin, L. A.; Kaltaev, Kh. Sh-o.

doi:10.1134/s1063774508070031

Cited by 13 publications

(10 citation statements)

References 2 publications

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“…The HRTEM image shows that the material is highly disordered with a degree of polycrystallinity indicated by the diffuse diffraction rings in the SAED pattern. The rings identied in the diffraction pattern are consistent with a lower oxygen content cubic alumina phase (Al 2 O 3Àx ), 27 possibly induced by the electron beam. Finally, the specic surface area of the material is determined from nitrogen adsorption using the Brunauer-Emmett-Teller (BET) method.…”

Section: Resultssupporting

confidence: 54%

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Low-temperature densification of Al-doped Li₇La₃Zr₂O₁₂: a reliable and controllable synthesis of fast-ion conducting garnets

et al. 2017

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Section: Resultssupporting

confidence: 54%

“…Much effort has been undertaken to determine the site preference of Al 3+ , and similar dopants such as Ga 3+ , in the cubic LLZO. 5,6,[18][19][20][21][22][23][24][25]27 Al magic angle spinning (MAS) nuclear magnetic resonance (NMR) spectra of Al-doped LLZO showed two characteristic resonances at ca. 66 ppm and ca.…”

Section: Introductionmentioning

confidence: 99%

Low-temperature densification of Al-doped Li₇La₃Zr₂O₁₂: a reliable and controllable synthesis of fast-ion conducting garnets

et al. 2017

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“…The presence of small intermediate zones of -Al 2 O 3 between the substrate and the eutectic components should not be discarded. Dan'ko et al (2008) have reported that corundum can transform into -Al 2 O 3 upon high-temperature reduction with small amounts of alkali metals.…”

Section: Discussionmentioning

confidence: 99%

“…The transformation corundum ! -Al 2 O 3 has also been reported upon high-temperature reduction with small amounts of alkali metals (Dan'ko et al, 2008).…”

Section: Description Of the Involved Structuresmentioning

confidence: 99%

In-situlaser synthesis of Nd–Al–O coatings: the role of sublattice cations in eutectic formation

Francisco

Bea

Vegas³

et al. 2015

Acta Crystallogr Sect B

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# 2015 International Union of Crystallography Neodymium aluminate coatings have been prepared in-situ by the laser zone melting (LZM) method, using a CO 2 SLABtype laser emitting at 10.6 mm. Polycrystalline Al 2 O 3 commercial plates have been used as substrates, and coatings were prepared from the corresponding mixtures of powdered neodymium and aluminium oxides as starting materials. Microstructure, studied by SEM and phase composition, studied by XRD, proved the in-situ formation of a NdAlO 3 / NdAl 11 O 18 eutectic. As a result, a well integrated composite coating was formed. Nanoindentation tests are consistent with excellent integration between coating and substrate. Structural similarities between the eutectic components within the coating, as well as between these and the substrate, are consistent with the crystallographic concepts proposed by Vegas (Ramos-Gallardo & Vegas, 1997), where cation subarrays play an important role governing metal oxide structures. These structure sublattices are suggested as the driving force behind eutectic oxide formation.

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“…In many crystal growth processes the graphite heat insulation or graphite heaters are used. The presence of carbon significantly complicates the gas-transport reactions in the Al-O-C system [7,8,9,10].…”

Section: Introductionmentioning

confidence: 99%

Growth of long undoped and Ce-doped LuAG single crystal fibers for dual readout calorimetry

Kononets

Auffray

Dujardin

et al. 2016

Journal of Crystal Growth

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The influence of the reducing Ar+CO atmosphere on the stages of starting raw material preparation, growth and post-growth annealing of yttrium aluminium garnet, Y3Al5O12 (YAG) crystals was studied. The chemical reactions involving CO atmosphere and its impact on the raw material, melt, and crystal composition are determined. Modification of YAG optical properties under the reducing annealing is discussed.

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Transformation of the corundum structure upon high-temperature reduction

Cited by 13 publications

References 2 publications

Low-temperature densification of Al-doped Li₇La₃Zr₂O₁₂: a reliable and controllable synthesis of fast-ion conducting garnets

Low-temperature densification of Al-doped Li₇La₃Zr₂O₁₂: a reliable and controllable synthesis of fast-ion conducting garnets

In-situlaser synthesis of Nd–Al–O coatings: the role of sublattice cations in eutectic formation

Growth of long undoped and Ce-doped LuAG single crystal fibers for dual readout calorimetry

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Transformation of the corundum structure upon high-temperature reduction

Cited by 13 publications

References 2 publications

Low-temperature densification of Al-doped Li7La3Zr2O12: a reliable and controllable synthesis of fast-ion conducting garnets

Low-temperature densification of Al-doped Li7La3Zr2O12: a reliable and controllable synthesis of fast-ion conducting garnets

In-situlaser synthesis of Nd–Al–O coatings: the role of sublattice cations in eutectic formation

Growth of long undoped and Ce-doped LuAG single crystal fibers for dual readout calorimetry

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Low-temperature densification of Al-doped Li₇La₃Zr₂O₁₂: a reliable and controllable synthesis of fast-ion conducting garnets

Low-temperature densification of Al-doped Li₇La₃Zr₂O₁₂: a reliable and controllable synthesis of fast-ion conducting garnets