Determination of oxygen content of YBa₂Cu₃O_7−δ using iodometric titration

Authors

Edwin L. Olmos ⋅ PH Materials Science and Engineering Program, University of the Philippines Diliman
Marvin U. Herrera ⋅ 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

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.