Microstructure and superconducting properties of Ag-substituted YBa2-xAgxCu3O7- δ ceramics prepared by sol-gel method
| Autor: | Fariesha Farha Ramli, Azhan Hashim, Norazidah Abd Wahab |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
010302 applied physics
Materials science Scanning electron microscope Annealing (metallurgy) General Mathematics Analytical chemistry General Physics and Astronomy Sintering Propylamine 02 engineering and technology General Chemistry 021001 nanoscience & nanotechnology Microstructure 01 natural sciences General Biochemistry Genetics and Molecular Biology Crystallography chemistry.chemical_compound chemistry Electrical resistivity and conductivity 0103 physical sciences Orthorhombic crystal system 0210 nano-technology General Agricultural and Biological Sciences Sol-gel |
| Zdroj: | Malaysian Journal of Fundamental and Applied Sciences. 13 |
| ISSN: | 2289-599X 2289-5981 |
| DOI: | 10.11113/mjfas.v13n2.655 |
| Popis: | Superconductor YBa 2-x Ag x Cu 3 O 7- δ in a bulk form has been developed through modified sol-gel processing. The preparation involved dissolving metal organic precursor in a mixture of propanoic acid and propylamine which then undergo for annealing at 900 °C for 5 hours and sintering at 950 °C for 5 hours. The bulk samples were characterized using X-ray diffractogram (XRD), resistivity measurement technique and Scanning Electron Microscope (SEM). The highest T C value was found at 84 K for x=0.05. The value decrease as the Ag concentration increase. The highest J C value measured for x =0.05 were 5.977 A/cm 2 at 50 K and 4.748 A/cm 2 a 60 K. 123 phase remains as orthorhombic for all samples. SEM micrograph showed the clear grains for the pure samples and it became not visible as the Ag concentration increase. |
| Databáze: | OpenAIRE |
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