Bibliographic Details
| Title: |
Liquid-phase/defect–barrier co-design for colossal-permittivity LST via ZnBi2O4 grain-boundary engineering. |
| Authors: |
Hsiang, Hsing-I1 (AUTHOR) hsingi@mail.ncku.edu.tw, Lin, Che-Cheng1 (AUTHOR) |
| Source: |
Ceramics International. May2026:Part B, Vol. 52 Issue 11, p17620-17630. 11p. |
| Subjects: |
Permittivity, Schottky barrier, Dielectric properties, Microstructure, Bismuth oxides, Crystal grain boundaries |
| Abstract: |
We report a co-design approach that combines La-doped SrTiO 3 (LST) with ZnBi 2 O 4 (ZB) to achieve low-temperature densification and grain-boundary (GB) barrier strengthening while retaining colossal permittivity (CP). Rietveld refinement confirms single-phase perovskite with subtle lattice changes consistent with limited Bi substitution and ZB-assisted microstructural evolution. XPS indicates ZB reduces the relative Ti3+ fraction (Ti3+/Ti total ratio) relative to Sr-deficient LST and, after post-fire re-oxidation, increases the adsorbed-oxygen fraction at GBs—features that support double-Schottky-barrier formation. Dielectric spectra show high permittivity with suppressed loss; Mott–Schottky analysis provides barrier descriptors that correlate with GB-controlled transport. This work defines a processing–defect–barrier window for CP SrTiO 3 compatible with base-metal co-firing. [ABSTRACT FROM AUTHOR] |
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| Database: |
Engineering Source |
