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Journal of Materials Science

, Volume 30, Issue 13, pp 3457–3462 | Cite as

Experimental studies and space charge mechanism for the conductivity/mobility enhancement due to SnO2 dispersion in Ag+ ion conducting borate glass

  • K. M. Shaju
  • S. Chandra
Article

Abstract

The enhancement in ionic conductivity of a Ag+ ion conducting borate glass of molar % composition 55.5 Agl-22.25 Ag20-22.25 B2O3 is reported with the dispersion of SnO2. X-ray diffraction (XRD), i.r. and optical microscopy reveals that the SnO2 addition yields a dispersed phase material and not a new glass. The material is essentially a Ag+ ion conducting (Agl+Ag2O+B2O3) glass in which SnO2 is dispersed. The direct measurement of mobility of the mobile ions reveals that the enhancement in conductivity is controlled by the enhancement in mobility. A space charge model based on the mechanism of adsorption-desorption of mobile ions near/at the interface in the space charge region creating a certain type of mobile ion concentration gradient is introduced to explain the results.

Keywords

Optical Microscopy SnO2 Disperse Phase Space Charge B2O3 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Chapman & Hall 1995

Authors and Affiliations

  • K. M. Shaju
    • 1
  • S. Chandra
    • 1
  1. 1.Department of PhysicsBanaras Hindu UniversityVaranasiIndia

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