Temperature and time dependence of Bi-2212 phase stability with Ca₂CuO₃ and CuO

Authors

Francisco A. Agra Materials Science and Engineering Program, University of the Philippines Diliman
Pio John Buenconsejo Materials Science and Engineering Program, University of the Philippines Diliman
Roland V. Sarmago National Institute of Physics, University of the Philippines Diliman

Abstract

The time and temperature dependence of Bi-2212 phase stability with Ca₂CuO₃ and CuO by solid state sintering at 810−860°C and at 10-100 hours was investigated. X-ray diffraction (XRD) analysis showed an increase in Bi-2212 peak intensities at increasing sintering time and temperature. Surface examination confirmed an increasing trend in crystal size from 830−860°C for 100 sintering hours and from 10−100 hours at 855°C.
At 860°C, the presence of Ca₂CuO₃ and CuO prevented the disproportionation of Bi-2212. A small amount of Bi-2223 also formed. Resistance measurement observed transitions at 78 K and 110 K from a 'mixed' sample sintered at 860°C for 100 hours. This confirmed the presence of Bi-2212 and Bi-2223.

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Issue

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

Article ID

SPP-2001-W2C-5

Section

Superconductivity

Published

2001-10-24

How to Cite

[1]

FA Agra, PJ Buenconsejo, and RV Sarmago, Temperature and time dependence of Bi-2212 phase stability with Ca2CuO3 and CuO, Proceedings of the Samahang Pisika ng Pilipinas 19, SPP-2001-W2C-5 (2001). URL: https://proceedings.spp-online.org/article/view/SPP-2001-W2C-5.