TU Darmstadt / ULB / TUbiblio

Solvent-deficient synthesis of nanocrystalline Ba0.5Sr0.5Co0.8Fe0.2O3-delta powder

Zeljkovic, Sasa and Miyawaki, Jin and Vrankovic, Dragoljub and Tervoort, Elena and Hauert, Roland and Kotegawa, Toru and Ivas, Toni (2018):
Solvent-deficient synthesis of nanocrystalline Ba0.5Sr0.5Co0.8Fe0.2O3-delta powder.
In: Processing and Application of Ceramics, Faculty of Technology, University of Novi Sad, Serbia, pp. 342-349, 12, (4), ISSN 1820-6131,
DOI: 10.2298/PAC1804342Z,
[Online-Edition: http://www.doiserbia.nb.rs/Article.aspx?ID=1820-61311804342Z...],
[Article]

Abstract

Nanocrystalline Ba(0.5)Sr(0.5)Co(0.8)Fe(0.2)O(3-delta )powders were prepared by a cost-effective solvent-deficient method using metal nitrates and ammonium bicarbonate as precursors. X-ray diffraction (XRD), specific surface determination (BET), thermal analyses (TG-DTA-DSC), dynamic light scattering (DLS) and scanning electron microscopy (SEM) were used to examine the effects of the calcination temperature on the Ba0.5Sr0.5Co0.8Fe0.2O3-delta (BSCF) formation. XRD analysis showed that a cubic Ba0.5Sr0.5Co0.8Fe0.2O3-delta was obtained after heating for 1 h at 1000 degrees C. BSCF nanocrystals with a diameter of about 25 nm were obtained. On the other hand, the sample mass was stabilized at 915 degrees C as recorded by thermogravimetric analysis (TG), indicating a formation of the complex BSCF oxide already at this temperature. The phase transformations during the synthesis of BSCF oxide are defined and confirmed with the note on the instability of the cubic phase. Using the four-point DC measurements between -73 degrees C and 127 degrees C, the band gap of 0.84 eV was determined. The solvent-deficient method used in this study to synthesize Ba0.5Sr0.5Co0.8Fe0.2O3-delta showed distinct advantages in comparison with other synthesis techniques considering simplicity, rapid synthesis, and quality of the produced nanocrystals.

Item Type: Article
Erschienen: 2018
Creators: Zeljkovic, Sasa and Miyawaki, Jin and Vrankovic, Dragoljub and Tervoort, Elena and Hauert, Roland and Kotegawa, Toru and Ivas, Toni
Title: Solvent-deficient synthesis of nanocrystalline Ba0.5Sr0.5Co0.8Fe0.2O3-delta powder
Language: English
Abstract:

Nanocrystalline Ba(0.5)Sr(0.5)Co(0.8)Fe(0.2)O(3-delta )powders were prepared by a cost-effective solvent-deficient method using metal nitrates and ammonium bicarbonate as precursors. X-ray diffraction (XRD), specific surface determination (BET), thermal analyses (TG-DTA-DSC), dynamic light scattering (DLS) and scanning electron microscopy (SEM) were used to examine the effects of the calcination temperature on the Ba0.5Sr0.5Co0.8Fe0.2O3-delta (BSCF) formation. XRD analysis showed that a cubic Ba0.5Sr0.5Co0.8Fe0.2O3-delta was obtained after heating for 1 h at 1000 degrees C. BSCF nanocrystals with a diameter of about 25 nm were obtained. On the other hand, the sample mass was stabilized at 915 degrees C as recorded by thermogravimetric analysis (TG), indicating a formation of the complex BSCF oxide already at this temperature. The phase transformations during the synthesis of BSCF oxide are defined and confirmed with the note on the instability of the cubic phase. Using the four-point DC measurements between -73 degrees C and 127 degrees C, the band gap of 0.84 eV was determined. The solvent-deficient method used in this study to synthesize Ba0.5Sr0.5Co0.8Fe0.2O3-delta showed distinct advantages in comparison with other synthesis techniques considering simplicity, rapid synthesis, and quality of the produced nanocrystals.

Journal or Publication Title: Processing and Application of Ceramics
Volume: 12
Number: 4
Publisher: Faculty of Technology, University of Novi Sad, Serbia
Uncontrolled Keywords: Ba0.5Sr0.5Co0.8Fe0.2O3-delta; nanofabrication; calcination temperature OXYGEN PERMEATION PERFORMANCE; PEROVSKITE OXIDE; CATHODE; DECOMPOSITION; COMBUSTION; BSCF; MICROSTRUCTURE; METHANE; NITRATE
Divisions: 11 Department of Materials and Earth Sciences
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences > Material Science > Dispersive Solids
Date Deposited: 28 Jun 2019 06:58
DOI: 10.2298/PAC1804342Z
Official URL: http://www.doiserbia.nb.rs/Article.aspx?ID=1820-61311804342Z...
Projects: Ministry of Science and Technology of Republic of Srpska, Grant Number 19/6-020/961-49/12
Export:
Suche nach Titel in: TUfind oder in Google

Optionen (nur für Redakteure)

View Item View Item