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Assessment of MgHf4P6O24 Electroceramic

Mohammed Adamu, Girish M Kale

2026enelectroceramicssolid electrolytesionic conductivitymagnesium sensorshigh temperatureelectrochemical impedance

Abstract

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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.

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Cite This Work

@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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