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Title: Dielectric properties of Bi-substituted LDHs synthesized by co-precipitation and sol-gel methods
Author: Sokol, Denis
Ivanov, Maksim
Salak, Andrei N.
Grigalaitis, Robertas
Banys, Juras
Kareiva, Aivaras
Keywords: Layered double hydroxide
Bismuth substitution
Dielectric properties
Issue Date: 19-Apr-2019
Publisher: Sciendo
Abstract: Magnesium-aluminum-bismuth layered double hydroxides (Mg3Al1-xBix; 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(NO3)3 · 9H2O, Mg(NO3)2 · 6H2O and Bi(NO3)3 · 5H2O) were mixed with a solution of NaHCO3: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 Mg3Al1-xBix 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.
Peer review: yes
DOI: 10.2478/msp-2019-0035
ISSN: 2083-1331
Appears in Collections:CICECO - Artigos

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