authors |
Emerenciano, AA; Araujo, AJM; Grilo, JPF; Macedo, DA; Rasekh, S; Kovalevsky, AV; Paskocimas, CA; Nascimento, RM |
nationality |
International |
journal |
MATERIALS LETTERS |
author keywords |
Ca3Co4O9; Ceramics; Environmentally friendly precursors; Proteic sol-gel synthesis; Electrical properties |
keywords |
CA3CO4O9 CERAMICS; COBALT OXIDE; MICROSTRUCTURE; ENHANCEMENT; PERFORMANCE; CA; BEHAVIOR; C349 |
abstract |
This work reports the microstructural and thermoelectric characterization of the misfit [Ca2CoO3-delta](0.62)[CoO2] compound obtained by a solid-state synthesis using mollusk shells and a proteic sol-gel method, which uses gelatin as a polymerizing agent. The results clearly demonstrate the capability of these routes to produce pure Ca3Co4O9 with plate-like morphology. Sintered ceramic samples show randomly oriented grains and relative densities in the range of 63-67%. The obtained microstructures provide reasonable electrical properties and result in competitive thermoelectric performance for the material prepared by the proteic sol-gel synthesis (P.F. of 205 mu W/K-2 m at 700 degrees C). (C) 2019 Elsevier B.V. All rights reserved. |
publisher |
ELSEVIER |
issn |
0167-577X |
isbn |
1873-4979 |
year published |
2019 |
volume |
254 |
beginning page |
286 |
ending page |
289 |
digital object identifier (doi) |
10.1016/j.matlet.2019.07.053 |
web of science category |
Materials Science, Multidisciplinary; Physics, Applied |
subject category |
Materials Science; Physics |
unique article identifier |
WOS:000484824500072
|