Synthesis of Cu-containing Diopside through a One-Step Crystallization
Eltohamy, M., Ali, A., Leonelli, C., Hamzawy, E. (2021). Synthesis of Cu-containing Diopside through a One-Step Crystallization. EKB Journal Management System, 64(11), 6673-6679. doi: 10.21608/ejchem.2021.22902.2364
Mohamed R. Eltohamy; Ashraf F Ali; Cristina Leonelli; Esmat M.A. Hamzawy. "Synthesis of Cu-containing Diopside through a One-Step Crystallization". EKB Journal Management System, 64, 11, 2021, 6673-6679. doi: 10.21608/ejchem.2021.22902.2364
Eltohamy, M., Ali, A., Leonelli, C., Hamzawy, E. (2021). 'Synthesis of Cu-containing Diopside through a One-Step Crystallization', EKB Journal Management System, 64(11), pp. 6673-6679. doi: 10.21608/ejchem.2021.22902.2364
Eltohamy, M., Ali, A., Leonelli, C., Hamzawy, E. Synthesis of Cu-containing Diopside through a One-Step Crystallization. EKB Journal Management System, 2021; 64(11): 6673-6679. doi: 10.21608/ejchem.2021.22902.2364

Synthesis of Cu-containing Diopside through a One-Step Crystallization

Egyptian Journal of Chemistry
Article 52, Volume 64, Issue 11, November 2021, Page 6673-6679  XML PDF (720.06 K)
Document Type: Original Article
DOI: 10.21608/ejchem.2021.22902.2364
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Authors
Mohamed R. Eltohamy email orcid 1; Ashraf F Ali2, 3; Cristina Leonelli4; Esmat M.A. Hamzawy1
1Glass Research Department, National Research Centre, 33 El Buhouth St., Dokki, Cairo 12622, Egypt
2Deanship ofthe Common First Year, Jouf University, KSA
3Inogranic Chemistry Department, National Research Centre, 33 El Buhouth St., Dokki, Cairo 12622, Egypt
4Department of Engineering “Enzo Ferrari”, University of Modena and Reggio Emilia, 41125 Modena, Italy
Abstract
The incorporation of copper into pyroxene structure was investigated through the melt quenching technique and one-step crystallization procedure. Two series of glasses have been studied, one set with Ca=Mg and another set with Ca>Mg in diopside formula Cux(Ca Mg)2-xSi2O6. The glasses were nucleated by TiO2, Cr2O3, or CaF2 additions as nucleating agents to variably control the phases produced. X-ray diffraction (XRD), scanning electron microscopy, and energy-dispersive X-ray spectroscopy (EDX) were used to characterize the obtained samples. The heat treatment studied at 700, 800, 900 and 1000 °C for 2 h produced green and dark green glasses based on Cu-containing diopside. Various crystalline wollastonite, cuprite, tenorite, cristobalite, quartz, and fluorite phases were developed with different ratios combined with diopside formation depending on the heat treatment and nucleating agents used. As the heat treatment increased in temperature, the crystallized fraction increased with the development of nano-aggregates and the observed reticulated textures confirmed a radical change in the euhedral crystals. This emphasizes that the Cu-containing diopside can be created by a facile one step process. These compositions may find some applications in biological and optical fields.
Keywords
diopside; glasses; nucleation; crystallization; microstructure
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