Highly Transparent <scp><scp>Mg</scp></scp>0.27<scp><scp>Al</scp></scp>2.58<scp><scp>O</scp></scp>3.73<scp><scp>N</scp></scp>0.27 Ceramic Prepared by Pressureless Sintering

Liu, Xiao; Wang, Hao; Tu, Baofeng; Wang, Weimin; Fu, Zhengyi

doi:10.1111/jace.12711

Cited by 49 publications

(6 citation statements)

References 24 publications

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“…Polycrystalline Mg 1– x Al 2(1+ x /3) O 4 samples were prepared by a conventional solid-state method, which has been employed to synthesize spinel-type MgO·1.5Al 2 O 3 , AlON, and MgAlON in our previous studies. − Commercial MgO (∼99.9%) and α-Al 2 O 3 (∼99.99%) powders were used to synthesize Mg 1– x Al 2(1+ x /3) O 4 with designed compositions of x = 0, 0.12, 0.25, 0.53, 0.6. The XRD patterns were recorded on a PANalytical X’Pert Pro X-ray diffractometer equipped with monochromated Cu Kα radiation (1.540598 Å, 40 kV, 40 mA).…”

Section: Experimental Detailsmentioning

confidence: 99%

Magic Angle Spinning NMR Study on Inversion Behavior and Vacancy Disorder in Alumina-Rich Spinel

Zhang

Wang

et al. 2018

Inorg. Chem.

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Solid state magic angle spinning nuclear magnetic resonance (NMR) and X-ray diffraction (XRD) were used to investigate the inverse behavior and vacancy disorder in alumina-rich spinel, MgAlO (0 ≤ x ≤ 0.86). Simulation and integration of NMR spectra have been developed for probing the population of Al located in different coordinated environments. Rietveld profile refinements were performed for powder XRD spectra by combining with NMR analysis. With changes in the composition, inversion disorder and cationic vacancies coexisting in tetrahedral and octahedral coordinations fluctuate in amount in the crystal lattice. The coordination polyhedra in the crystal structure can adjust the volume to variations of composition, anion parameter, and inverse parameter. This opens a window to the design and functionalization of spinel materials.

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Section: Experimental Detailsmentioning

confidence: 99%

Magic Angle Spinning NMR Study on Inversion Behavior and Vacancy Disorder in Alumina-Rich Spinel

Zhang

Wang

et al. 2018

Inorg. Chem.

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“…Moreover, yttria possesses a broader range of transparency, a lower high-temperature infrared (IR) emissivity, and a higher theoretical thermal conductivity compared to the aforementioned conventional transparent ceramics, which make transparent yttria ceramics better TA B L E 1 Physical properties of transparent Y 2 O 3 , YAG, AlON, and MgAl 2 O 4 ceramic materials. [3][4][5][6][7][8] .…”

Section: Introductionmentioning

confidence: 99%

Highly transparent yttria ceramics with Nb₂O₅/Ta₂O₅ as novel sintering additives by pressureless vacuum sintering

Liu

Gan²,

Qin

et al. 2023

J Am Ceram Soc.

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Highly transparent yttria ceramics were fabricated by pressureless sintering with Nb 2 O 5 or Ta 2 O 5 as a novel sintering additive. The optical transmittance, microstructural evolution, and thermo-mechanical properties of the samples were investigated. The optimal doping concentrations of Nb 2 O 5 and Ta 2 O 5 are 0.3 and 0.2 at.%, respectively, which are much lower compared to those of previously reported counterparts. The transmittance of the sample with 0.3 at.% Nb 2 O 5 reaches 81.6% at 1100 nm and 72.4% at 400 nm (2 mm in thickness), similar transmittance was obtained in the sample with 0.2 at.% Ta 2 O 5 . The microhardness (∼7 GPa), fracture toughness (∼0.85 MPa⋅m 1/2 ), and biaxial strength (∼200 MPa) of the present samples were confirmed to be comparable or even better compared to those of previously reported transparent yttria ceramics fabricated by pressureless sintering. Furthermore, the present samples, by virtue of the low doping concentrations, possessed relatively high thermal conductivity values (>10 W/m⋅K), which substantially guaranteed high thermal shock resistance.

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“…[6][7][8][9] Researchers have conducted a large number of theoretical and experimental studies on the phase diagram, crystal structure, preparation, and properties of transparent ceramics of MgAlON. [10][11][12] It has been found that the infrared optical transmittance of the MgAlON transparent ceramics is better than that of the AlON transparent ceramics, but the mechanical properties of the former are difficult to surpass those of the latter. Clay et al developed a series of research studies on the synthesis and preparation of LiAlON transparent ceramics using LiAl 5 O 8 , Al 2 O 3 , and AlN as raw materials.…”

Section: Introductionmentioning

confidence: 99%

Crystal structure investigation of spinel‐type LiAlON with multiple atomic disorders

Wang

Chen

et al. 2023

J Am Ceram Soc.

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Spinel‐type lithium aluminum oxynitride (LiAlON) contains atomic disorders at every crystallographic position, including vacancies, cation, and anion disorders. In this work, the crystal structure of spinel‐type LiAlON with multiple atomic disorders was systematically studied by first‐principles calculation, solid‐state NMR, and the Rietveld crystal structure refinement. The theoretical simulations demonstrate that the Li+ occupies octahedral positions and prefers to be far away from the N3− and cation vacancies in the crystal structure of LiAlON. A spinel‐type LiAlON compound with chemical formula of Li0.06Al2.72O3.77N0.23 was prepared by solid‐state reaction. The local structure of Li+ and Al3+ was probed by 7Li and 27Al solid‐state NMR technology. Combined with theoretical calculations and solid‐state NMR, the crystal structure of Li0.06Al2.72O3.77N0.23 was fully resolved by the Rietveld refinement. This work provides a deep understanding on the disordered crystal structure of the spinel‐type LiAlON solid solution.

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Highly Transparent Mg_0.27Al_2.58O_3.73N_0.27 Ceramic Prepared by Pressureless Sintering

Cited by 49 publications

References 24 publications

Magic Angle Spinning NMR Study on Inversion Behavior and Vacancy Disorder in Alumina-Rich Spinel

Magic Angle Spinning NMR Study on Inversion Behavior and Vacancy Disorder in Alumina-Rich Spinel

Highly transparent yttria ceramics with Nb₂O₅/Ta₂O₅ as novel sintering additives by pressureless vacuum sintering

Crystal structure investigation of spinel‐type LiAlON with multiple atomic disorders

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Highly Transparent Mg0.27Al2.58O3.73N0.27 Ceramic Prepared by Pressureless Sintering

Cited by 49 publications

References 24 publications

Magic Angle Spinning NMR Study on Inversion Behavior and Vacancy Disorder in Alumina-Rich Spinel

Magic Angle Spinning NMR Study on Inversion Behavior and Vacancy Disorder in Alumina-Rich Spinel

Highly transparent yttria ceramics with Nb2O5/Ta2O5 as novel sintering additives by pressureless vacuum sintering

Crystal structure investigation of spinel‐type LiAlON with multiple atomic disorders

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Product

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About

Highly Transparent Mg_0.27Al_2.58O_3.73N_0.27 Ceramic Prepared by Pressureless Sintering

Highly transparent yttria ceramics with Nb₂O₅/Ta₂O₅ as novel sintering additives by pressureless vacuum sintering