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Aulya Rizqi
Universitas Negeri Semarang
Education Materials Science & Nanotechnology Physics

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Phase transformation in Fe–Ti–O composites as potential lead-free piezoelectric materials for energy sensor applications Aulya Rizqi; Agus Yulianto; Budi Astuti
Journal of Physics: Theories and Applications Vol 10, No 1 (2026): Journal of Physics: Theories and Applications
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/jphystheor-appl.v10i1.114433

Abstract

The Fe₂O₃–TiO₂ composite sintered at 900 °C exhibits a phase transformation from Fe₃O₄ to Fe₂O₃, which significantly affects the functional properties of the material. Composition variations (0:100 to 90:10) result in clear differences in densification, porosity, resistivity, and piezoelectric response. An increase in the Fe₂O₃ fraction strengthens densification but decreases piezoelectric voltage due to limited dipole movement. In contrast, the dominance of TiO₂ favors high resistivity while producing a maximum voltage of 0.01 V at a 10:90 composition. These results confirm that the balance of the Fe₂O₃–TiO₂ ratio determines the optimal combination of properties, as well as underscore the potential of this composite as an environmentally friendly lead-free piezoelectric material for sensor and energy device applications.
Co-Authors Agus Yulianto Budi Astuti