Estimation of the free-charge-carrier concentration in fast-ion conducting Na2S-B2S3 glasses from an analysis of the frequency-dependent
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1994-11-01
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Martin, Steve
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Materials Science and Engineering
Materials engineers create new materials and improve existing materials. Everything is limited by the materials that are used to produce it. Materials engineers understand the relationship between the properties of a material and its internal structure — from the macro level down to the atomic level. The better the materials, the better the end result — it’s as simple as that.
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Materials Science and Engineering
Abstract
ac and dc conductivities of fast-ion conducting xNa2S+(1-x)B2S3 glasses in the composition range 0.001≤x≤0.1 were analyzed using the Almond-West formula σ(ν)=σdc[1+(ν/νH)α]. The hopping frequency for free charge carriers νH, the dc conductivity σdc, and their respective activation energies were determined. The concentration of free charge carriers evaluated from the conductivities and estimated mobilities is in good agreement with the overall content of sodium cations in the glasses and it is proposed that this supports the concept of a strong and not weak electrolyte model for these fast-ion conducting glasses.
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This article is from Physical Review B 50 (1994): 13259–13266, doi:10.1103/PhysRevB.50.13259. Posted with permission.
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Sat Jan 01 00:00:00 UTC 1994