X-ray characterization ofβ- andβ″-alumina

Schmid, Chiara

doi:10.1007/bf01748072

Cited by 22 publications

(4 citation statements)

References 9 publications

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“…Although Na-β-Al2O3 was not recognized in the samples by the software most likely due to overlap with Na-β''-Al2O3 peaks, the partially converted composites more than likely contain a mixture of Na-β-Al2O3 and Na-β''-Al2O3. [26] This helps explain the small peaks at 44.2° and 33.6° in the diffractogram of the vapor converted 80/20 Al2O3/YSZ-3 composite seen in the bulk but not on the surface, which is already fully converted to Na-β''-Al2O3. In each image, the top blue curve (A/B bulk) is from the bulk powder after vapour conversion, the middle red curve (A/B surface) is from the surface after vapour conversion, and the bottom black curve (α-Al2O3/YSZ-3) is the composite before vapour conversion.…”

Section: Xrdmentioning

confidence: 92%

Performance analysis of Na-β″-Al2O3/YSZ solid electrolytes produced by conventional sintering and by vapor conversion of α-Al2O3/YSZ

et al. 2020

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Section: Xrdmentioning

confidence: 92%

Performance analysis of Na-β″-Al2O3/YSZ solid electrolytes produced by conventional sintering and by vapor conversion of α-Al2O3/YSZ

et al. 2020

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“…XRD analysis was performed at 40 kV and 30 mA using Cu Kα radiation. The relative amounts of the phases were determined by calculating the line intensities of the well-separated peaks of each phase using the following equations [19,20]:…”

Section: Methodsmentioning

confidence: 99%

The Influences of Sio2 on the Sintering Behavior and the Properties of Na+- Β/Β"-Al2O3 Solid Electrolyte

Lee

Lim

2019

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SiO2-doped Na+-β/β″-Al2O3 was synthesized via a solid-state reaction, and the relationship between the SiO2 content and properties of Na+-β/β″-Al2O3 was investigated. Respective specimens were doped with 0 – 5 wt.% SiO2 as a liquid phase sintering promotor and sintered. The specimens were characterized by XRD, SEM, densimeter and impedance analyzer. In the sintered samples, the phase fraction of β″-Al2O3 decreased as the SiO2 content increased, whereas the relative sintered density was enhanced with the inclusion of less than 0.7 wt.% SiO2. The relative sintered density of Na+- β/β″-Al2O3 sintered specimen with 0.7 wt.% SiO2 doping reached 99.2 % of the theoretical density and the sintered density decreased when the amount of SiO2 was larger than 1 wt.% result from excessive liquid-phase formation during sintering. Similarly, the ionic conductivity of SiO2-doped Na+-β/β″-Al2O3 was enhanced by doping with a small amount of SiO2, whereas the addition of more than 1 wt.% SiO2 negatively affected the ionic conductivity of Na+-β/β″-Al2O3 due to a decrease in the sintered density and unfavorable phase relationship. DOI: http://dx.doi.org/10.5755/j01.ms.25.3.14246

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“…The phase compositions of the calcined and sintered samples were measured with an X-ray diffractometer (D/max 2200, Rigaku, Japan). The relative amounts of the phases were determined by calculating the line intensities of the well-separated peaks of each phase using the following equations [19,20]:…”

Section: Methodsmentioning

confidence: 99%

Effects of calcium impurity on phase relationship, ionic conductivity and microstructure of Na+- β / β″-alumina solid electrolyte

Lee

et al. 2016

Bull Mater Sci

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Ca-doped Na +-β/β-alumina was synthesized using a solid-state reaction. The changes in the properties of Na +-β/β-alumina resulting from the presence of Ca impurity were studied. Ca (0-5 wt%) was added to the respective samples, which were then sintered. The specimens were characterized using X-ray diffraction, scanning electron microscopy, densimetry and impedance analysis. In the sintered specimens, the β-alumina phase fraction decreased as Ca content increased, whereas the relative sintered density increased. The surface morphology of Cadoped Na +-β/β-alumina specimens showed a Ca-rich layer, which was the main cause of increase in the specific resistance.

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X-ray characterization ofβ- andβ″-alumina

Cited by 22 publications

References 9 publications

Performance analysis of Na-β″-Al2O3/YSZ solid electrolytes produced by conventional sintering and by vapor conversion of α-Al2O3/YSZ

Performance analysis of Na-β″-Al2O3/YSZ solid electrolytes produced by conventional sintering and by vapor conversion of α-Al2O3/YSZ

The Influences of Sio2 on the Sintering Behavior and the Properties of Na+- Β/Β"-Al2O3 Solid Electrolyte

Effects of calcium impurity on phase relationship, ionic conductivity and microstructure of Na+- β / β″-alumina solid electrolyte

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