Synthesis of Nanocrystalline Ba0,5Sr0,5FeO3-δ by Sol-gel Self-Combustion Method

7th Nanoscience and Nanotechnology Symposium

物理学;材料科学

Fitriana, F.^1 ; Anjarwati, D.Z.^1 ; Baity, P.S.N.^1 ; Suasmoro, S.^1

Dept. of Physics, Institut Teknologi Sepuluh Nopember, Surabaya

60111, Indonesia^1

关键词: Calcination conditions;    Electrochemical reductions;    Electronic conductivity;    Environment friendly;    Intermediate temperatures;    Long term stability;    MIEC;    Sol gel self combustions;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/395/1/012011/pdf
DOI  :  10.1088/1757-899X/395/1/012011

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Fuel cell is a one of device to convert chemical into proper electric energy, has some advantages including high efficiency, long term stability, fuel flexibility, environment friendly. To develop SOFC operates at intermediate temperature (500-700°C), it is necessary to figure out a cathode material capable of overcoming the low electrochemical reduction activity in oxygen at intermediate temperatures. Ba0,5Sr0,5FeO3-δ (BSF) has mixed ionic and electronic conductivity properties (MIEC). A sol-gel self-combustion method was used to synthesize BSF due to easier preparation and produces excellent result (high homogeneity and high reactivity) powder. Two conditions were set up in different pH, namely 0-1 and 6-7. The self-combustion reaction occurred on heating up to 220 °C and produced yield ashes. To acquire the calcination condition, the temperature was carried out at 500, 700, 900, 1000, and 1100 °C for 6 hours. In this study, the phase formation, structure, and crystallite size of BSF was characterized by make use of X-ray diffraction (XRD) data. The results show that BSF has cubic perovskite structure with space group pm3m (221), crystallite size 52 and 109 nm for pH 0-1 and 6-7 respectively.