Thermal analysis of sintering Li–Ti–Zn ferrite from mechanically activated powders

The effect of mechanical activation of the synthesized ferrite powder on the process of thermal sintering of ferrite ceramics has been studied. Mechanical activation of the powder of Li 0.65 Fe 1.6 Ti 0.5 Zn 0.2 Mn 0.05 O 4 composition was performed at a drum rotation speed of 300, 600, and 1100 rpm...

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Bibliographic Details
Published in:Journal of thermal analysis and calorimetry 2023-02, Vol.148 (4), p.1687-1692
Main Authors: Nikolaeva, Svetlana A., Lysenko, Elena N., Nikolaev, Evgeniy V., Ghyngazov, Sergey A.
Format: Article
Language:English
Subjects:
Activated sintering
Analysis
Analytical Chemistry
Ceramic materials
Ceramic powders
Ceramics
Chemistry
Chemistry and Materials Science
Dilatometry
Energy utilization
Extensometers
Inorganic Chemistry
Iron compounds
Measurement Science and Instrumentation
Physical Chemistry
Polymer Sciences
Powders
Sintering
Sintering (powder metallurgy)
Thermal analysis
Zinc
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Summary:The effect of mechanical activation of the synthesized ferrite powder on the process of thermal sintering of ferrite ceramics has been studied. Mechanical activation of the powder of Li 0.65 Fe 1.6 Ti 0.5 Zn 0.2 Mn 0.05 O 4 composition was performed at a drum rotation speed of 300, 600, and 1100 rpm using steel balls with a diameter of 2 and 5 mm. The mechanically activated powder was sintered in a highly sensitive dilatometer at 1010 °C for 2 h. Dilatometric analysis showed that the total shrinkage of the samples during sintering increases at increased energy intensity of ferrite powder milling. It was found that the sample prepared from the powder mechanically activated with 2 mm balls shows the best degree of complete compaction after sintering as compared with the samples activated using 5 mm balls. Shrinkage curves were used for kinetic analysis based on mathematical modeling to determine the parameters of ferrite sintering. Kinetic analysis showed that diffusion models are best suited for modeling the sintering process.
ISSN:1388-6150
1588-2926
DOI:10.1007/s10973-022-11409-1