Open AccessAnalysis of the initial-stage sintering of mechanically activated SrTiO3
Author(s) -
Jelena Živojinović,
Vera P. Pavlović,
Nebojša Labus,
Vladimir A. Blagojević,
Darko Kosanović,
Vladimir B. Pavlović
Publication year - 2019
Publication title -
science of sintering/science of sintering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.309
H-Index - 25
eISSN - 1820-7413
pISSN - 0350-820X
DOI - 10.2298/sos1902199z
Subject(s) - sintering , isothermal process , materials science , activation energy , microstructure , process (computing) , electroceramics , metallurgy , composite material , fabrication , thermodynamics , chemistry , medicine , microfabrication , physics , alternative medicine , pathology , computer science , operating system
The initial-stage of sintering plays a significant role in determining the final microstructure that defines the main characteristics of electroceramics materials such as functional properties. In this article non-isothermal sintering of non-activated and mechanically activated SrTiO3 samples was investigated up to 1300?C. Dilatometric curves indicate that mechanical activation leads to an earlier onset of sintering, suggesting that it should lead to a more homogenous and denser sintered product. Analysis of the initial stage of sintering reveals that the sintering process of all examinated samples consists of tw? or three overlapping single-step processes, with a change in the dominant mass transport mechanism. The values of apparent activation energy of the considered single-step process exhibit a significant decrease with an increase in mechanical activation time. The values of the density of samples after isothermal sintering indicate that the final stage of sintering has not been reached by 1300?C.