Particle motion in glasses

Rao, K. J.; Parthasarathy, Rajarathinam

doi:10.1007/bf02841266

Proc. Indian Acad. Sci. (Chem. Sci.)

1985

DOI: 10.1007/bf02841266

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Particle motion in glasses

K. J. Rao

Rajarathinam Parthasarathy

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1986

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Cited by 2 publications

References 135 publications

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Low temperature properties of glasses—Unsolved problems

Raychaudhuri

1986

Proc. Indian Acad. Sci. (Chem. Sci.)

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Al~tract, Glasses show very interesting behaviour well below the glass transition teml~rature. Inspire of various experimental observations, even simple quantitative explanations relating these relaxation phenomena to structural properties are absent. In this paper we have tried to point out a phenomenological approach to this problem by identifying certain parameters which we think can be used to characterize these relaxations. Keywards. Glasses; relaxation; tunnelling model.

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Low temperature properties of glasses—Unsolved problems

Raychaudhuri

1986

Proc. Indian Acad. Sci. (Chem. Sci.)

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A new approach for understanding ion transport in glasses; example of complex alkali diborate glasses containing lead, bismuth and tellurium oxides

Gowda¹,

Reddy²,

Rao

2013

Bull Mater Sci

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Mechanism of ion transport in glasses continues to be incompletely understood. Several of the theoretical models in vogue fail to rationalize conductivity behaviour when d.c. and a.c. measurements are considered together. While they seem to involve the presence of at least two components in d.c. activation energy, experiments fail to reveal that feature. Further, only minor importance is given to the influence of structure of the glass on the ionic conductivity behaviour. In this paper, we have examined several general aspects of ion transport taking the example of ionically conducting glasses in pseudo binary, yNa 2 B 4 O 7 •(1−y) M a O b (with y = 0•25-0•79 and M a O b = PbO, TeO 2 and Bi 2 O 3) system of glasses which have also been recently characterized. Ion transport in them has been studied in detail. We have proposed that non-bridging oxygen (NBO) participation is crucial to the understanding of the observed conductivity behaviour. NBO-BO switching is projected as the first important step in ion transport and alkali ion jump is a subsequent event with a characteristically lower barrier which is, therefore, not observed in any study. All important observations in d.c. and a.c. transport in glasses are found consistent with this model.

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Particle motion in glasses

Cited by 2 publications

References 135 publications

Low temperature properties of glasses—Unsolved problems

Low temperature properties of glasses—Unsolved problems

A new approach for understanding ion transport in glasses; example of complex alkali diborate glasses containing lead, bismuth and tellurium oxides

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