Kinetics modification by eggshell biomineral of cubic-CaZrO3 at 800 °C
Por:
Martínez E.C., Huerta H.E.Q., Coello P.E.A., del Lourdes Chávez García M., Esqueda J.A.R., Cruz A.T., Morales K.E.R., Ibarra J.E.R., Guerrero S.E., Peralta O.N., Bazán-Díaz L.
Publicada:
1 ene 2026
Ahead of Print:
1 ene 2026
Resumen:
© This is a U.S. Government work and not under copyright protection in the US; foreign copyright protection may apply 2026.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.
Filiaciones:
Martínez E.C.:
Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, Cd. Universitaria, 04510, Mexico City, Mexico
Huerta H.E.Q.:
Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, Cd. Universitaria, 04510, Mexico City, Mexico
Facultad de Ingeniería, Universidad Nacional Autónoma de México, Cd. Universitaria, 04510, Mexico City, Mexico
Coello P.E.A.:
Instituto de Energías Renovables, Universidad Nacional Autónoma de México, Xochicalco s/n, Azteca, 62588, Temixco, Morelos, Mexico
del Lourdes Chávez García M.:
Facultad de Química, Universidad Nacional Autónoma de México, Cd. Universitaria, 04510, Mexico City, Mexico
Esqueda J.A.R.:
Instituto de Física, Universidad Nacional Autónoma de México, Cd. Universitaria, 04510, Mexico City, Mexico
Cruz A.T.:
Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, Cd. Universitaria, 04510, Mexico City, Mexico
Morales K.E.R.:
Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, Cd. Universitaria, 04510, Mexico City, Mexico
Ibarra J.E.R.:
Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, Cd. Universitaria, 04510, Mexico City, Mexico
Guerrero S.E.:
Instituto de Física, Universidad Nacional Autónoma de México, Cd. Universitaria, 04510, Mexico City, Mexico
Peralta O.N.:
Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, Cd. Universitaria, 04510, Mexico City, Mexico
Bazán-Díaz L.:
Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, Cd. Universitaria, 04510, Mexico City, Mexico
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