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 ⋅ PH Materials Science and Engineering Program, University of the Philippines Diliman
Melissa B. Manauis ⋅ PH Materials Science and Engineering Program, University of the Philippines Diliman
Roland V. Sarmago ⋅ PH 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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Issue

2001: Proceedings of the 19th Samahang Pisika ng Pilipinas Philippine Physics Congress

Article ID

SPP-2001-W2C-6

Section

Superconductivity

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.