Enhanced densification and ionic conductivity of LLZO by flash sintering
Source abstract
Abstract
Flash sintering arouses the interest since high-density ceramics can be obtained at shorter dwell times and lower temperatures than conventional sintering. In this study, the cubic garnet Li 6.25 Al 0.25 La 3 Zr 2 O 12 (Al-LLZO) was successfully synthesised by the solid-state method. The powders were uniaxially pressed and were subjected to flash sintering at 850°C in a tube furnace under a DC bias using various current densities. It is evidenced that control of the flash electric current is a crucial factor for densification of Al-LLZO. The sample sintered in 50 V cm −1 and 200 mA mm −2 showed a cubic LLZO, 94 ± 0.4% relative density, 0.37 mS cm −1 total ionic conductivity and 0.32 eV activation energy. In addition, it was demonstrated that increasing the current density had a considerable impact on the relative density. This outstanding ionic conductivity might be due to the lower lithium loss and higher density as a result of flash sintering method applied.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Microwave Dielectric Ceramics Synthesis · Ferroelectric and Piezoelectric Materials · Nuclear materials and radiation effects
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
School of Metallurgy and Materials Engineering, Iran University of Science and Technology (IUST), Tehran, Iran
Renewable Energy Department, Niroo Research Institute (NRI), Tehran, Iran
Funding
Iran National Science Foundation
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