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

Authors

Francisco A. Agra ⋅ PH Materials Science and Engineering Program, University of the Philippines Diliman
Pio John Buenconsejo ⋅ 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 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.