Effect of Heat Treatment on The Crystal Structur, Electrical Conductivity and Surface of Ba1.5Sr0.5Fe2O5 Composite

4th International Conference on Advanced Materials Science and Technology

Purwanto, P.^1 ; Adi, W.A.^1 ; Yunasfi^1

Center for Science and Technology of Advanced Materials, National Nuclear Energy Agency of Indonesia (BATAN), Kawasan Puspiptek Serpong, Tangerang Selatan

15314, Indonesia^1

关键词: Ba1,5Sr0,5Fe2O5;    Conductivity measurements;    Crystal structur;    Effect of heat treatments;    Electrical conductivity;    Energy dispersive spectroscopies (EDS);    Powder metallurgy techniques;    Sintering temperatures;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/202/1/012076/pdf
DOI  :  10.1088/1757-899X/202/1/012076

来源: IOP

【 摘 要 】

The Composite of Ba1,5Sr0,5Fe2O5has been synthesized by using powder metallurgy technique. The Ba1.5Sr0.5Fe2O5were prepared from BaCO3, SrCO3and Fe2O3raw materials with a specific weight ratio. The three materials were synthesized by powder metallurgy under heat treatment at 800 °C, 900 °C, and 1000 °C for 5 hours. All the three samples were characterized by using X-ray Diffraction (XRD) to determine the crystal structure and crystal size, LCR meter to determine the conductivity, and Scanning Electron Microscope (SEM) to observe the morphological of the composites. The phase analysis result showed that the composite consists of several minor phases such as BaO2, SrO2, and Fe2O3. The Crystal size of composite Ba1.5Sr0.5Fe2O5decreased while increases the strain of crystal with increasing of sintering temperature. The crystal size of the Ba1.5Sr0.5Fe2O5composite is 3.55 nm to 7.23 nm and value of strain is 8.47% until 3.90%. Based on the conductivity measurement, it was obtained that the conductivity of the Ba1.5Sr0.5Fe2O5composite decreased with increasing sintering temperature. It was also noticed that the conductivity increased with increasing of frequency. The conductivity ranged from 6.619×10-7S/cm to 65.659×10-7S/cm. The energy dispersive spectroscopy (EDS) analysis showed that several dominant elements were a good agreement with the phase analysis.