K(Sr2Nb3)O10 (KSN) ceramic without the secondary phase was obtained from a KSN + 0.05K2O specimen sintered at 1350°C. This ceramic was used as the precursor to synthesize Sr2Nb3O10 − (SNO−) nanosheets, because it has a pure KSN phase with a large (002) plane. The SNO− nanosheets were deposited on a Pt/Ti/SiO2/Si substrate using the electrophoresis method at room temperature, and heated at various temperatures to get rid of the organic defects. The crystalline SNO phase without organic defects was formed in film annealed at 600°C. However, when the annealing temperature exceeded 600°C, the Pt electrode became unstable, resulting in degradation of the SNO film. Good electric properties were obtained from the SNO film annealed at 600°C: dielectric constant of 70, dielectric loss of 0.017 at 1.0 MHz, leakage current density of 3.5×10−8 A/cm2 at 0.2 MV/cm, and a breakdown electric field of 0.25 MV/cm.
Bibliographical noteFunding Information:
This work was conducted under the framework of Research and Development program of the Korea Institute of Energy Research (KIER) (B6-2454). The authors also thank the KU-KIST graduate school program of Korea University.
All Science Journal Classification (ASJC) codes
- Ceramics and Composites
- Materials Chemistry