Determination of oxygen content of YBa₂Cu₃O_7−δ using iodometric titration

Authors

Edwin L. Olmos Materials Science and Engineering Program, University of the Philippines Diliman
Marvin U. Herrera Materials Science and Engineering Program, University of the Philippines Diliman
Roland V. Sarmago National Institute of Physics, University of the Philippines Diliman

Abstract

In this paper, we were able to determine the δ values of annealed YBa₂Cu₃O_7−δ samples using iodometric titration. The method involves the addition of SCN as indicator for the true endpoint after the starch endpoint. For the samples annealed (6 hrs, 950°C) with air and those annealed (6 hrs, 950°C) under constant oxygen flow, we obtained the average δ values of 0.287 and 0.251, respectively. X-ray powder diffraction tests confirm that the samples are essentially those of orthorhombic or superconducting YBa₂Cu₃O_7−δ.

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Issue

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

Article ID

SPP-2001-H1A-4

Section

Superconductivity

Published

2001-10-24

How to Cite

[1]

EL Olmos, MU Herrera, and RV Sarmago, Determination of oxygen content of YBa2Cu3O7−δ using iodometric titration, Proceedings of the Samahang Pisika ng Pilipinas 19, SPP-2001-H1A-4 (2001). URL: https://proceedings.spp-online.org/article/view/SPP-2001-H1A-4.