A5050052588- Advanced Thermoelectric Materials and Devices
- Thermal Expansion and Ionic Conductivity
- Magnetic and transport properties of perovskites and related materials
- Advancements in Solid Oxide Fuel Cells
- Advanced Condensed Matter Physics
University of Aveiro
2021-2022
Aliovalent substitutions in Ca3Co4O9 often result complex effects on the electrical properties and solubility, impact of substituting cation also depends largely preparation processing method. It is well-known that monoclinic symmetry this material’s composite crystal structure allows for a significant hole transfer from rock salt-type Ca2CoO3 buffer layers to hexagonal CoO2 ones, increasing concentration holes breaking electron–hole latter layers. This work explored relevant relatively low...
The present work explores the possibility of incorporation silicon into crystal structure Ruddlesden-Popper La2NiO4+δ mixed conducting ceramics with aim to improve chemical compatibility lanthanum silicate-based solid electrolytes. Ceramics nominal composition La2Ni1−ySiyO4+δ (y = 0, 0.02 and 0.05) were prepared by glycine nitrate combustion technique sintered at 1450 °C. While minor changes in lattice parameters tetragonal K2NiF4-type may suggest a small fraction Si Ni sublattice, combined...
It is well-known that the electrical properties of Ca3Co4O9 thermoelectric (TE) compound are strongly influenced by valence substituting cation, while its solubility and "functional" impact depend largely on preparation and/or processing methods used [...]