An x-ray diffraction and SEM study of the effect of excess CaCO3, CaO and CuO on the stability of Bi-2212 phase

Authors

  • Persia Ada N. de Yro Materials Science and Engineering Program, University of the Philippines Diliman
  • Melissa B. Manauis Materials Science and Engineering Program, University of the Philippines Diliman
  • Roland V. Sarmago National Institute of Physics, University of the Philippines Diliman

Abstract

The properties of the BSCCO superconductors depend strongly on the sintering temperature, time and composition. We have examined the effect of adding CaCO3-CuO and CaO-CuO on previously synthesized Bi-2212 precursor. CaCO3 and CuO powders were ground with the original 2212 precursor, pelletized and sintered at 845°C and 855°C for 75 hours and at 850°C for 50 hours. CaO and CuO were added to the original 2212 precursor, powdered, pelletized and sintered at 830°C, 840°C and 860°C for 100 hours. The composition of the sintered pellets was determined using x-ray diffraction. SEM micrographs of the samples were obtained. The sintered pellets consisted almost entirely of Bi-2212 phase, CaCuO3 and CuO. The addition of CaCO3-CuO and CaO-CuO stabilized the Bi-2212 phase. The compound CaCuO3 that resulted from this addition promoted the stabilization of Bi-2212.

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Published

2001-10-24

How to Cite

[1]
PAN de Yro, MB Manauis, and RV Sarmago, An x-ray diffraction and SEM study of the effect of excess CaCO3, CaO and CuO on the stability of Bi-2212 phase, Proceedings of the Samahang Pisika ng Pilipinas 19, SPP-2001-W2C-6 (2001). URL: https://proceedings.spp-online.org/article/view/SPP-2001-W2C-6.