Electrical properties of phosphate glasses |
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Authors: | Roger F Bartholomew |
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Institution: | Research and Development Laboratories, Corning Glass Works, Corning, New York 14830, USA |
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Abstract: | The electrical properties of glasses in the Na2OP2O5, Ag2OP2O5 and (1?x)Na2OxAg2OP2O5 systems have been measured over a range of temperature and composition.The properties of the Na2OP2O5 and Ag2OP2O5 glasses have been compared within the phosphate system as well as with silicate glasses. The silver-containing glasses show higher conductivity and lower temperature coefficients when compared with the sodium-containing glasses. A maximum in the room temperature resistivity of the (1?x)Na2O?xAg2O?P2O5 system was found around the mole ratio of 0.16:0.84 Ag2O:Na2O, indicating a mixed-alkali effect. A similar effect was seen in the tan δ, but not in the Tg-against-composition plots. A linear relationship was noted for the tan δ-versus-log10 (resistivity) plot, as has been seen in other glass-forming systems. |
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