Open AccessEFFECT OF NORMALIZING HEATING OF FERRITE COMPACTS ON COMPACTION DURING RADIATION-THERMAL SINTERING
Author(s) -
Oldřich Starý,
AUTHOR_ID
Publication year - 2021
Publication title -
eurasian physical technical journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.194
H-Index - 2
eISSN - 2413-2179
pISSN - 1811-1165
DOI - 10.31489/2021no3/11-14
Subject(s) - materials science , sintering , shrinkage , compaction , annealing (glass) , thermal , metallurgy , ferrite (magnet) , composite material , grinding , thermodynamics , physics
The study investigated linear shrinkage of lithium-titanium ferrite samples during radiation-thermal and thermal sintering. Prior to compaction, part of the powders were subjected to thermal heating for 2h at temperatures of 1273, 1373, and 1473 K. It is found that changes in the shrinkage kinetics of ferrites after powder annealing are consistent with the classical concepts of thermal deexcitation of powders due to annealing of defects. Such defects were formed in powder grains during grinding. The obtained data analysis allowed us to offer the most likely model for radiation-thermal activation of powder ferrite sintering. This is a model of radiation inhibition of non-equilibrium defects relaxation.