Analysis of the crystal phases of Na+-beta-aluminas synthesized by infiltration of alkali molten salts

Lee, Daehan; Lee, Sung-Tae; Lee, Kimoon; Lim, Sung-Ki

doi:10.1016/j.jiec.2012.04.006

Journal of Industrial and Engineering Chemistry

2012

DOI: 10.1016/j.jiec.2012.04.006

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Analysis of the crystal phases of Na+-beta-aluminas synthesized by infiltration of alkali molten salts

Daehan Lee¹,

Sung-Tae Lee²,

Kimoon Lee³

et al.

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Cited by 3 publications

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“…So, Na + -β/β″-Al2O3 has been used as solid electrolyte in sodium/sulfur battery and this battery operate at 300 -350 °C. Thus, the ionic conductivities data were focused at 350 °C, in this study [35,36]. Table 2 lists ionic conductivity of various dopant doped Na + -β/β ″ -Al2O3 investigated by other researchers for compared to the value obtained in this study [37 -39].…”

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

Lee

Lim

2019

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Sol–gel synthesis of Mg2+ stabilized Na-β″/β-Al2O3 solid electrolyte for sodium anode battery

Zhang

et al. 2014

Journal of Alloys and Compounds

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Impact of sintering temperature on the Al₂O₃ electrolyte

Khokhar,

El Jery,

Ahmed

et al. 2023

Zeitschrift Für Physikalische Chemie

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Highly conductive and stable β″-Al2O3 electrolyte powder is achieved via the solid-state reaction technique when sintered at 1200 °C, 1250 °C, 1300 °C, 1350 °C, and 1400 °C temperature, correspondingly. The findings show that the ionic conductivity has improved slightly from 1200 °C to 1400 °C. As the sintering temperature is increased, the EIS curve shows a short curve of resistance. A maximum ionic conductivity of 7.07 × 10−4 S cm−2 is achieved at 1400 °C (1800 Ω). This is caused by the large β″ contents in Al2O3, as inspected by the X-ray diffraction results. Furthermore, the morphology of Al2O3 shows less porosity and denser particles within the powder.

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Analysis of the crystal phases of Na+-beta-aluminas synthesized by infiltration of alkali molten salts

Cited by 3 publications

References 9 publications

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

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

Sol–gel synthesis of Mg2+ stabilized Na-β″/β-Al2O3 solid electrolyte for sodium anode battery

Impact of sintering temperature on the Al₂O₃ electrolyte

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Analysis of the crystal phases of Na+-beta-aluminas synthesized by infiltration of alkali molten salts

Cited by 3 publications

References 9 publications

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

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

Sol–gel synthesis of Mg2+ stabilized Na-β″/β-Al2O3 solid electrolyte for sodium anode battery

Impact of sintering temperature on the Al2O3 electrolyte

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Product

Resources

About

Impact of sintering temperature on the Al₂O₃ electrolyte