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Growth of nanocrystalline PbS within a glass

Published online by Cambridge University Press:  31 January 2011

M. Mukherjee ,
A. Datta  and
D. Chakravorty
M. Mukherjee
Affiliation:
Indian Association for the Cultivation of Science, Jadavpur, Calcutta, 700 032, India
A. Datta
Affiliation:
Indian Association for the Cultivation of Science, Jadavpur, Calcutta, 700 032, India
D. Chakravorty
Affiliation:
Indian Association for the Cultivation of Science, Jadavpur, Calcutta, 700 032, India
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Abstract

Nanocrystalline PbS has been grown within a phase-separated oxide glass of composition 10 Na2O, 15 PbO, 17 CaO, 3 Bi2O3, and 55 SiO2 (in mole %) by passing H2S gas over it at temperatures varying from 773 to 943 K. The particle size ranged from 2.5 to 12.9 nm. The dc resistivity of composites of nanocrystalline PbS and the phase separated glass has been measured over the temperature range 300 to 670 K. The resistivity variation in the temperature range 550 to 670 K is characterized by the sodium ion migration in the glass with an activation energy, ∼1.2 eV. The resistivity in the range 300 to 500 K was controlled by conduction in PbS particles with the estimated band gap showing an increase with a decrease in the particle size.

Type
Articles
Information
Journal of Materials Research , Volume 12 , Issue 10 , October 1997 , pp. 2507 - 2510
Copyright
Copyright © Materials Research Society 1997

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References

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