Dielectric properties of Bi-substituted LDHs synthesized by co-precipitation and sol-gel methods

Magnesium-aluminum-bismuth layered double hydroxides (Mg Al Bi ; LDHs) were prepared using both coprecipitation and sol-gel methods. For the preparation of Mg/Al/Bi LDH by the co-precipitation method, the appropriate amounts of dissolved starting materials (Al(NO · 9H O, Mg(NO · 6H O and Bi(NO · 5H...

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Bibliographic Details
Published in:Materials science--Poland 2019-06, Vol.37 (2), p.190-195
Main Authors: Sokol, Denis, Ivanov, Maksim, Salak, Andrei N., Grigalaitis, Robertas, Banys, Juras, Kareiva, Aivaras
Format: Article
Language:English
Subjects:
bismuth substitution
co-precipitation
dielectric properties
layered double hydroxide
sol-gel
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Summary:Magnesium-aluminum-bismuth layered double hydroxides (Mg Al Bi ; LDHs) were prepared using both coprecipitation and sol-gel methods. For the preparation of Mg/Al/Bi LDH by the co-precipitation method, the appropriate amounts of dissolved starting materials (Al(NO · 9H O, Mg(NO · 6H O and Bi(NO · 5H O) were mixed with a solution of NaHCO :NaOH. In the sol-gel processing, the precursor Mg–Al–Bi–O gels were synthesized using the same starting materials and ethylene glycol as complexing agent. The mixed-metal oxides obtained by subsequent heating of Mg–Al–Bi–O gels at 650 °C were reconstructed to Mg Al Bi LDHs in water at 80 °C. All the synthesized products were characterized by X-ray diffraction (XRD) analysis, scanning electron microscopy (SEM) and dielectric measurements.
ISSN:2083-134X
2083-134X
DOI:10.2478/msp-2019-0035