Mohammed Adamu, Girish M Kale
In this study, we investigate the electrochemical properties of MgHf4P6O24 electroceramic oxide electrolyte for its application in high-temperature electrochemical sensors designed to detect magnesium in non-ferrous alloys. The focus is on the electrical characteristics of Mg2+-cation conducting species within the solid-state electrolytes, evaluated through electrochemical impedance analysis at varying temperatures (182-764 °C) and frequencies (0.1-32 MHz). The results highlight a promising ionic conductivity of 4.52 x 10^-4 S/cm for the MgHf4P6O24 electrolyte at 747 °C, demonstrating operational stability within 1000 °C to 1300 °C. Additionally, we report on the design and fabrication of solid-state Mg-sensors utilizing the highly conductive solid-state electrolyte, incorporating a biphasic powder mixture of MgCr2O4 and Cr2O3 as a reference electrode. The sensors successfully detected magnesium dissolved in molten aluminum at approximately 700 °C, revealing a linear relationship between electromotive force (emf) and logarithm of magnesium concentration, with a transport number of 0.84±0.03 for Mg2+ ions, confirming their potential in high-temperature applications.
@article{3244133a-d8dd-4da1-9766-14253825cb4a,
title={Assessment of MgHf4P6O24 Electroceramic},
author={Mohammed Adamu and Girish M Kale},
year={2026},
language={en}
}TY - JOUR TI - Assessment of MgHf4P6O24 Electroceramic AU - Mohammed Adamu AU - Girish M Kale PY - 2026 LA - en ER -
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