| Autor: |
Jiro Fukunaga, Takashi Wakasugi, Akio Hirota, Rikuo Ota |
| Rok vydání: |
1997 |
| Předmět: |
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| Zdroj: |
Journal of Non-Crystalline Solids. 210:141-147 |
| ISSN: |
0022-3093 |
| DOI: |
10.1016/s0022-3093(96)00590-x |
| Popis: |
The solubility of Ag 2 O was measured for the Na 2 O–B 2 O 3 and Na 2 O–B 2 O 3 –Al 2 O 3 system with the rotating crucible method and static method, respectively, under air atmosphere at temperatures ranging from 1273 to 1423 K. The contamination of melts from crucibles could be avoided by the rotating crucible method, with which it became possible to measure the solubility of Ag 2 O for the Na 2 O–B 2 O 3 system above the melting point of Ag for the first time. It was found that the addition of Na 2 O decreases the solubility of Ag 2 O while the addition of Al 2 O 3 had little effect on the solubility. The effect of Na 2 O and Al 2 O 3 on the solubility of Ag 2 O is expressed by interaction coefficients and is analyzed in terms of the basicity of melts. The solubility of Ag 2 O in Na 2 O–B 2 O 3 –Al 2 O 3 melts increased with increased temperature. This phenomena was explained by a small enthalpy change in oxidation of silver. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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