2025 - Sustainable Industrial Processing Summit
SIPS2025 Volume 5. Meyers Intl. Symp. / Composite

Editors:F. Kongoli, P. Assis, H.A.C. Lopera, S. Diaz, S.N. Monteiro, V.S. Candido
Publisher:Flogen Star OUTREACH
Publication Year:2025
Pages:316 pages
ISBN:978-1-998384-46-4 (CD)
ISSN:2291-1227 (Metals and Materials Processing in a Clean Environment Series)
CD-SIPS2025_Volume1
CD shopping page

    SYNTHESIS OF POTASSIUM FERRITE BY THE SOL-GEL AUTO-COMBUSTION METHOD: INFLUENCE OF CALCINATION TEMPERATURE ON CRYSTALLINE PHASES

    Ary Machado de Azevedo1; Pedro Henrique Poubel Mendonça da Silveira1; Lisley Madeira Coelho1; Sergio Monteiro1; Belayne Zanini Marchi1; Marcelo Henrique Prado da Silva1; André Ben-Hur da Silva Figueiredo1;
    1MILITARY INSTITUTE OF ENGINEERING, Rio de Janeiro, Brazil;
    Type of Paper: Regular
    Id Paper: 43
    Topic: 18

    Abstract:

    Potassium ferrite was synthesized through the sol-gel auto-combustion [1] chemical route, aiming to evaluate the influence of calcination temperature on the formation of crystalline phases. The obtained samples were subjected to calcination temperatures of 0°C (post-combustion), 300°C, 550°C, 750°C, and 950°C. Structural characterizations were performed using X-Ray Diffraction (XRD), where the crystallite size was calculated from the most intense peak at each calcination temperature using the Scherrer equation [2]. Micrographs were also obtained to assess grain size, along with analyses by Mössbauer Spectroscopy, Fourier Transform Infrared Spectroscopy (FTIR), and Raman Spectroscopy. The results demonstrated that the synthesis of potassium ferrite was successful; however, an increasing formation of additional phases of potassium ferrite and magnetite was observed with rising calcination temperatures. Therefore, it is concluded that the sol-gel auto-combustion method is not recommended for applications requiring a specific crystalline phase predominance, due to the simultaneous generation of secondary phases with higher thermal treatment temperatures [3]. Additionally, as the temperature increased, a reduction in grain size was observed, attributed to the combustion of residual fuel traces.

     

    Keywords:

    Potassium Ferrite; Sol-Gel Auto-Combustion; Calcination Effect; Crystalline Phases

    Cite this article as:

    Machado de Azevedo A, Poubel Mendonça da Silveira P, Madeira Coelho L, Monteiro S, Zanini Marchi B, Prado da Silva M, Ben-Hur da Silva Figueiredo A. (2024). SYNTHESIS OF POTASSIUM FERRITE BY THE SOL-GEL AUTO-COMBUSTION METHOD: INFLUENCE OF CALCINATION TEMPERATURE ON CRYSTALLINE PHASES. In F. Kongoli, P. Assis, H.A.C. Lopera, S. Diaz, S.N. Monteiro, V.S. Candido (Eds.), Sustainable Industrial Processing Summit Volume 5 Meyers Intl. Symp. / Composite (pp. 255-256). Montreal, Canada: FLOGEN Star Outreach