Results 131 to 140 of about 488,521 (181)

Alumina Substructure and Electrical Conductivity in Vitreous Silica

Journal of the American Ceramic Society, 1984
A network of alumina cells that remains after a vitreous silica sphere is heated in hydrogen supports the suggestion that alumina and associated sodium and lithium ions in vitreous silica are nonuniformly distributed. This distribution explains the anomalously large diffusion coefficient and electrical mobility of these alkali ions
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Electric-field-gradient distribution in vitreous yttrium iron garnet

Physical Review B, 1980
M\"ossbauer quadrupole splitting (QS) measurements are reported for ${\mathrm{Fe}}^{57}$ in vitreous YIG (${\mathrm{Y}}_{3}$${\mathrm{Fe}}_{5}$${\mathrm{O}}_{12}$). Electric-field-gradient (EFG) calculations from a computer model of amorphous YIG suggest a distribution $p(|V|)$ of principal EFG components $V$ which peaks at a nonzero value, is ...
M. Eibschütz, M. E. Lines, K. Nassau
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Electrical characteristics of vitreous vs common carbons

Applied Physics Letters, 1972
The carbonization of certain cross-linked polymers under carefully controlled conditions yields a nongraphitizing carbon which, on account of its high lustre and conchoidal fracture, has been called ``vitreous carbon''. The temperature coefficient of resistivity for this carbon has been determined and its bulk resistivity reconfirmed.
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Electrical and Photoelectric Properties of Modified Chalcogenide Vitreous Semiconductors

1985
For a long time after the discovery of chalcogenide vitreous semi-conductors (ChVS) [1,2], it was believed that, unlike crystalline semiconductors, ChVS are practically insensitive to doping with various impurities, i.e., that extrinsic conductivity does not appear [3–5].
B. T. Kolomiets, V. L. Averyanov
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Time Dependence Calculation of the Breakdown Rate for Electrical Breakdowns in Vitreous Solids

physica status solidi (b), 1992
AbstractThe anomalous behaviour of different physical quantities in vitreous solids contrary to the behaviour in crystalline solids, mainly the dielectric behaviour, can be described by the effect of a system of additional low‐energy excitations in these solids. This also applies to the amorphous SiO2‐layers in MOS structures.
M. Danziger, A. Bernhardt
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The Nature of the Electrical Conductivity of Vitreous Semiconductors

1971
The band theory of conduction is based on the assumption of a perfect crystalline structure of solids. Experimental investigations of the conductivity of liquids and amorphous bodies have shown that this condition is not always satisfied [1]. The fact that long-range order is not essential, and that the electron energy spectrum remains unchanged on ...
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Effect of Gamma Irradiation on the Electrical Properties of Vitreous SiO2

Inorganic Materials, 2005
The effect of gamma irradiation on the electrical properties of vitreous SiO2 is studied at temperatures from 290 to 720 K and gamma doses from 102 to 5 × 107 Gy. The activation energy of conduction in the samples studied is shown to be unaffected by gamma irradiation.
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Electrical Conductivity in the Vitreous Selenium-Arsenic System

1971
Difficulties in the physical interpretation of the electron conductivity of amorphous materials prompted A. F. Ioffe and other workers to put forward short-range order and the associated chemical bonding as the most important factors determining the nature of semiconductors [1–7]. Investigations of liquid [8–10] and vitreous [11–13] semiconductors have
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Electric conduction of composite titanium-containing coatings on vitreous enamel substrates

Glass and Ceramics, 1999
It is demonstrated that the main factor determining the high conductivity of heat-treated titanium-bearing phosphate coatings is the decrease in the resistivity of oxide films on the surface of titanium particles.
E. V. Shinkareva, V. V. Tavgen’
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AN ELECTRIC FURNACE FOR VITREOUS ENAMELING ¹

Journal of the American Ceramic Society, 1923
ABSTRACT An electric furnace for vitreous enameling built with round wire coils placed in top, bottom and both sides. The furnace is equipped with a double loading fork and some cost data are given.
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