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Liquid-phase/defect–barrier co-design for colossal-permittivity LST via ZnBi2O4 grain-boundary engineering.

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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]
Copyright of Ceramics International is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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DbLabel: Engineering Source
An: 193008228
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
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  Data: Liquid-phase/defect–barrier co-design for colossal-permittivity LST via ZnBi2O4 grain-boundary engineering.
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  Data: <searchLink fieldCode="AR" term="%22Hsiang%2C+Hsing-I%22">Hsiang, Hsing-I</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> hsingi@mail.ncku.edu.tw</i><br /><searchLink fieldCode="AR" term="%22Lin%2C+Che-Cheng%22">Lin, Che-Cheng</searchLink><relatesTo>1</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Ceramics+International%22">Ceramics International</searchLink>. May2026:Part B, Vol. 52 Issue 11, p17620-17630. 11p.
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  Data: <searchLink fieldCode="DE" term="%22Permittivity%22">Permittivity</searchLink><br /><searchLink fieldCode="DE" term="%22Schottky+barrier%22">Schottky barrier</searchLink><br /><searchLink fieldCode="DE" term="%22Dielectric+properties%22">Dielectric properties</searchLink><br /><searchLink fieldCode="DE" term="%22Microstructure%22">Microstructure</searchLink><br /><searchLink fieldCode="DE" term="%22Bismuth+oxides%22">Bismuth oxides</searchLink><br /><searchLink fieldCode="DE" term="%22Crystal+grain+boundaries%22">Crystal grain boundaries</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: 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]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Ceramics International is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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      – Type: doi
        Value: 10.1016/j.ceramint.2026.02.346
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      – Code: eng
        Text: English
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        PageCount: 11
        StartPage: 17620
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      – SubjectFull: Permittivity
        Type: general
      – SubjectFull: Schottky barrier
        Type: general
      – SubjectFull: Dielectric properties
        Type: general
      – SubjectFull: Microstructure
        Type: general
      – SubjectFull: Bismuth oxides
        Type: general
      – SubjectFull: Crystal grain boundaries
        Type: general
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      – TitleFull: Liquid-phase/defect–barrier co-design for colossal-permittivity LST via ZnBi2O4 grain-boundary engineering.
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              Text: May2026:Part B
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              Y: 2026
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