A5052100288- Microwave Dielectric Ceramics Synthesis
- Photorefractive and Nonlinear Optics
- Ferroelectric and Piezoelectric Materials
- Electrocatalysts for Energy Conversion
- Advancements in Solid Oxide Fuel Cells
- Catalytic Processes in Materials Science
Forschungszentrum Energiespeichertechnologien
2024
Clausthal University of Technology
2021-2024
The temperature and oxygen partial pressure (pO2) dependent electrical conductivity of LiNbO3, LiTaO3, LiNb1-xTaxO3 (LNT) solid solutions up to 900 °C is presented. found be isotropic about 700 °C. Different Nb/Ta ratios do not affect activation energies at temperatures below 600 °C, which suggests an identical conduction mechanism, namely the migration Li ions by means vacancies. Above this temperature, noticeable deviations in Nb rich samples emerge due strongly increasing electronic...
The investigation of the structural phase transition in vicinity Curie temperature crystals is motivated by expected combination advantageous high‐temperature properties and , including high piezoelectric modules remarkable stability, respectively. marks ultimate limit for exploiting properties; however, transition‐related modifications might impact this other even below . Remarkably, from ferroelectric to paraelectric phase, whose strongly depends on composition x shows a significant drop...
Bulk ceria-zirconia solid solutions (Ce1−xZrxO2−δ, CZO) are highly suited for application as oxygen storage materials in automotive three-way catalytic converters (TWC) due to the high levels of achievable non-stoichiometry δ. In thin film CZO, properties expected be further enhanced. The present study addresses this aspect. CZO films with 0 ≤ x 1 were investigated. A unique nano-thermogravimetric method that is based on resonant nanobalance approach high-temperature characterization was...