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<p>Herein, we report the room temperature (Tr) stabilization of polymorphic cubic phase calcium zirconate (c-CaZrO<sub>3</sub>). The samples were prepared by a solid-state approach at 800&#xa0;°C for 96 h, a temperature considerably lower than the one reported previously. The reduction of the transition temperature is attributed to the use of chicken eggshells (ES) as a bio-reagent for CaCO<sub>3</sub>. Several characterizations were done on the raw materials and processed systems, including simultaneous differential scanning calorimetry/thermogravimetric analysis, and powder x-ray diffraction (XRD). The organic matter amount was not quantified. Transmission electronic microscopy corroborates the crystals size of 50–200 nm and the presence of c-CaZrO<sub>3</sub> at Tr which was not detected by XRD. Photoluminescence on this polymorph of CaZrO<sub>3</sub> emits green light, shown with measurements by using a 355 nm laser which led to emission at a characteristic peak around 532 nm.</p> Graphical abstract <p>Fast Fourier transform (FFT) of c-CaZrO<sub>3</sub>.</p>

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Kinetics modification by eggshell biomineral of cubic-CaZrO3 at 800 °C

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年1月30日

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  • Elizabeth Chavira Martínez,
  • Hugo Emir Quintana Huerta,
  • Patricia Eugenia Altuzar Coello,
  • María del Lourdes Chávez García,
  • Jorge Alejandro Reyes Esqueda,
  • Adriana Tejeda Cruz,
  • Karla Eriseth Reyes Morales,
  • Josué Esaú Romero Ibarra,
  • Salvador Escobar Guerrero,
  • Omar Novelo Peralta,
  • Lourdes Bazán-Díaz

摘要

Herein, we report the room temperature (Tr) stabilization of polymorphic cubic phase calcium zirconate (c-CaZrO3). The samples were prepared by a solid-state approach at 800 °C for 96 h, a temperature considerably lower than the one reported previously. The reduction of the transition temperature is attributed to the use of chicken eggshells (ES) as a bio-reagent for CaCO3. Several characterizations were done on the raw materials and processed systems, including simultaneous differential scanning calorimetry/thermogravimetric analysis, and powder x-ray diffraction (XRD). The organic matter amount was not quantified. Transmission electronic microscopy corroborates the crystals size of 50–200 nm and the presence of c-CaZrO3 at Tr which was not detected by XRD. Photoluminescence on this polymorph of CaZrO3 emits green light, shown with measurements by using a 355 nm laser which led to emission at a characteristic peak around 532 nm.

Graphical abstract

Fast Fourier transform (FFT) of c-CaZrO3.