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Raman, Dilatometric, and Dielectric Insights into Pr3+-Doped Pb-Sb Silicate Glasses toward Ion-Conducting Glass Electrolytes

  • 0Department of Physics, Acharya Nagarjuna University, Nagarjuna Nagar, Guntur 522 510, India.
The Journal of Physical Chemistry. B +

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September 22, 2025

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September 22, 2025

View abstract on PubMed

Summary

This summary is machine-generated.

Adding red lead (Pb3O4) to Sb2O3-SiO2:Pr2O3 glasses alters their structure and properties. Higher Pb3O4 content initially reduces conductivity but then increases it by enhancing ion mobility for solid-state electrolyte applications.

Area Of Science

  • Materials Science
  • Solid-State Chemistry
  • Glass Science

Background

  • Development of novel solid-state electrolytes is crucial for advanced battery technologies.
  • Understanding structure-property relationships in oxide glasses is key to optimizing ionic conductivity.

Purpose Of The Study

  • To investigate the impact of red lead (Pb3O4) concentration on the structural, thermal, dielectric, and conductivity properties of Sb2O3-SiO2:Pr2O3 glasses.
  • To elucidate the conduction mechanisms and their dependence on glass network evolution.

Main Methods

  • Melt-quenching technique for glass synthesis.
  • Raman spectroscopy for structural analysis (including temperature-dependent studies).
  • Dilatometry for thermal expansion and softening point determination.
  • Dielectric spectroscopy and AC conductivity measurements over a range of frequencies and temperatures.

Main Results

  • Raman spectroscopy revealed progressive network polymerization up to 30 mol% Pb3O4, followed by depolymerization at 35 mol%.
  • Dilatometry indicated changes in thermal expansion coefficients and softening temperatures correlating with structural evolution.
  • AC conductivity decreased with increasing Pb3O4 up to 30 mol% due to a compact structure, but significantly increased at 35 mol% Pb3O4 due to network depolymerization and enhanced ion mobility.
  • Polaronic conduction was dominant at lower Pb3O4 content, transitioning to ionic conduction (primarily Pb2+) at higher concentrations.

Conclusions

  • Red lead addition significantly influences the structure and ionic conductivity of Sb2O3-SiO2:Pr2O3 glasses.
  • A critical Pb3O4 concentration (35 mol%) promotes network depolymerization, enhancing ionic mobility and conductivity.
  • These findings provide fundamental insights for designing glass-based solid-state electrolytes, potentially incorporating lighter alkali ions for improved battery performance.