Optical and electrical properties of lead silicate glasses

B. M. Cohen, Donald R Uhlmann, R. R. Shaw

Research output: Contribution to journalArticle

42 Citations (Scopus)

Abstract

The optical and electrical properties of PbO-SiO2 glasses containing 24.6 to 65 mole % PbO have been determined. While the short-wavelength cutoff increases continuously in wavelength with increasing PbO concentration, an abrupt lightening in color is observed in the vicinity of 38-40% PbO. The darker color of glasses containing 30-38% PbO has been associated with a scattering process. The origin of this scattering is discussed and is tentatively identified with the formation of microcrystals of SiO2 in the glasses. The alternative process of liquid-liquid phase separation seems less likely, but cannot be ruled out with certainty. The electrical conductivity of all glasses investigated exhibits an Arrhenian temperature dependence. The activation energy decreases from about 1.23 eV for the 30% PbO composition to about 1.11 eV for the 50% PbO composition, and remains about constant for glasses containing higher concentrations of PbO. Addition of NH4Cl or Sb2O3 to the batch or use of Pb(NO3)2 or Pb3O4 instead of PbO as a raw material does not affect the electrical properties. The dielectric constant at 1kHz increases continuously with increasing PbO concentration, from a value in excess of 20 for the 55% PbO composition. The implications of these results for the conduction mechanism in PbO-SiO2 glasses are discussed.

Original languageEnglish (US)
Pages (from-to)177-188
Number of pages12
JournalJournal of Non-Crystalline Solids
Volume12
Issue number2
DOIs
StatePublished - 1973
Externally publishedYes

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Silicates
silicates
Electric properties
Optical properties
electrical properties
optical properties
Glass
glass
Chemical analysis
Scattering
Color
color
Wavelength
Microcrystals
microcrystals
Liquids
scattering
wavelengths
Phase separation
lead silicate

ASJC Scopus subject areas

  • Ceramics and Composites
  • Electronic, Optical and Magnetic Materials

Cite this

Optical and electrical properties of lead silicate glasses. / Cohen, B. M.; Uhlmann, Donald R; Shaw, R. R.

In: Journal of Non-Crystalline Solids, Vol. 12, No. 2, 1973, p. 177-188.

Research output: Contribution to journalArticle

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