In particular, we analyzed the particle transport mode during flash sintering in terms of particle diffusion. It is believed that the transform in the particles transport mode from solid diffusion to flow mass transfer accelerated the particles diffusion rate, which ensure the particle rearrangement ...
Field-assisted flash sintering has started to be explored since the application of an adequate electric field was shown to significantly reduce the sintering time and temperature, thereby controlling grain growth. In this work, Ba0.85Ca0.15Zr0.1Ti0.9O3 ceramics are obtained by current-controlled ...
(b) Crystalline ceramics tend to be produced via powder processing (e.g. sintering). (c) Crystalline ceramics tend to exhibit super plasticity. (d) Crystalline ceramics tend to express the weakest of the bonding types, making dislocation motion relatively easy. ...
Higher delivered Joule heating at the interfaces due to the presence of the electronic conductors (CNTs) are proposed as the main reason for that improvement of the electrical behavior. Keywords: solid electrolytes; samaria-doped ceria; carbon nanotubes; flash sintering; impedance spectroscopy 1. ...
A novel technique of low temperature and fast sintering is expected to meet the productive requirements of reducing energy consumption and improving efficiency. In this work, a dense Nb-doped BaTiO3 ceramic is obtained by a sintering method applying a direct current electrical field of 140 V cm(...
SINTERINGELECTRIC fieldsHerein, hot鈥恠pot generation in bulk barium titanate samples is investigated during controlled current ramping at various rates using in situ dilatometry. The incubation of the flash event is separated from dielectric breakdown at high current densities, which has prev...
Flash sinteringDensification kineticsBaTiO3Oxygen vacanciesDefect annihilationHerein, we report the densification behavior of a typical electric ceramic, barium titanate (BaTiO3), and highlight the role of oxygen vacancies in rapid densification of BaTiO3 during flash sintering. The activation energies of...
A novel technique of low temperature and fast sintering is expected to meet the productive requirements of reducing energy consumption and improving efficiency. In this work, a dense Nb-doped BaTiO3 ceramic is obtained by a sintering method applying a direct current electrical field of 140 V cm ...
Barium titanateCurrent rampFlash sinteringSurface temperatureThermal imagingZinc oxide? 2022 Elsevier LtdHotspot or preferential current path formation is a major problem halting the advance of flash sintering as an industry applicable densification method. In-situ infrared thermal imaging shows significant ...
Flash sinteringDensification kineticsBaTiO3Oxygen vacanciesDefect annihilationHerein, we report the densification behavior of a typical electric ceramic, barium titanate (BaTiO3), and highlight the role of oxygen vacancies in rapid densification of BaTiO3 during flash sintering. The activation energies of...