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 shopping page
MICROSTRUCTURE AND CRYSTALLINE PHASE EVALUATION OF POTASSIUM FERRITE OBTAINED BY COLD SINTERING PROCESS USING DIFFERENT SOLVENT SOLUTIONS
Ary Machado de Azevedo1; Pedro Henrique Poubel Mendonça da Silveira1; Lisley Madeira Coelho1; Belayne Zanini Marchi1; Marcelo Henrique Prado da Silva1; Sergio Monteiro1;1MILITARY INSTITUTE OF ENGINEERING, Rio de Janeiro, Brazil;
Type of Paper: Regular
Id Paper: 44
Topic: 18
Abstract:
This study investigated the Cold Sintering Process (CSP) [1] of potassium ferrite, previously synthesized by the sol-gel auto-combustion method. To date, there have been no reported cases of potassium ferrite sintering; therefore, two solutions were tested for transient phase formation: acetic acid at a 5 molar concentration and pure ethanol, both applied at 5 wt% of the sample's weight. After consolidation of the specimens, an average material loss of 20 wt% was observed in both cases. Structural characterization by X-Ray Diffraction (XRD) indicated that the use of acetic acid resulted in a poorly defined crystalline phase, highlighting the inadequacy of this solvent for the studied method, despite achieving bulk formation. On the other hand, the use of ethanol revealed significant microstructural changes, confirmed by Scanning Electron Microscopy (SEM) images. It was observed that the initial microstructure, characterized by typical grains resulting from combustion synthesis, evolved into a lamellar (plate-like) structure [2,3], leading to an improvement in the mechanical strength of the material when compared to specimens produced with acetic acid. These results demonstrate that ethanol is an effective solvent for optimizing the microstructural and mechanical properties of potassium ferrite obtained through cold sintering process.