An investigation of the effects of the pelletizing pressure on the superconducting properties of a lead-doped BSCCO grown by the second combustion method

• Main Authors: Refamonte, Eliza Y., Billones, David Kenneth
• Format: text
• Language: English
• Published: Animo Repository 1995
• Subjects: Bismuth trioxide; Superconductors; Physics
• Online Access: https://animorepository.dlsu.edu.ph/etd_bachelors/3760
• Institution: De La Salle University

The second combustion method was employed in the fabrication of lead-doped BSCCO bulk superconductors. Samples of varied pelletizing pressure were prepared to determine the effect of pelletizing pressure variation to the superconducting properties of the said material. Characterization of each sample was made possible through the XRD and P-T measurements. It was found that as the pelletizing pressure increases, the high-Tc percentage content increased. It reaches a maximum peak at 1.27 tons/cm2, then beyond this value the high-Tc percentage content decreases as the pelletizing pressure increases. The same behavior was observed for the pelletizing pressure against the intensities of the peaks. Moreso, it was also observed that the curve of the lattice parameter (a = b) for low-Tc against the pelletizing pressure behaves similarly with the behavior of the high-Tc percentage content versus the pelletizing pressure. The values of the lattice parameter (a = b) for high-Tc were relatively high at 1.91 tons/cm2. However, the lattice parameters (c) do not exhibit dependency over the pelletizing pressure. The P-T curves were generally the same for the samples, with a gradual and smooth transition. Samples subjected to a pelletizing pressure of 1.27 tons/cm2 exhibited the best results based on the XRD patterns and P T curves obtained.