A structural basis for ionic diffusion in oxide glasses
The relationships between the environments of cations in alkali silicates measured by X-ray absorption fine structure (XAFS) and magic angle spinning nuclear magnetic resonance (MASNMR) are considered. Both are consistent with the modified random network for glass structure in which modifiers form c...
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| Veröffentlicht in: | Philosophical magazine. A, Physics of condensed matter. Defects and mechanical properties Physics of condensed matter. Defects and mechanical properties, 1991-11, Vol.64 (5), p.1059-1072 |
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| container_issue | 5 |
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| container_title | Philosophical magazine. A, Physics of condensed matter. Defects and mechanical properties |
| container_volume | 64 |
| creator | Greaves, G. N. Gurman, S. J. Catlow, C. R. A. Chadwick, A. V. Houde-Walter, S. Henderson, C. M. B. Dobson, B. R. |
| description | The relationships between the environments of cations in alkali silicates measured by X-ray absorption fine structure (XAFS) and magic angle spinning nuclear magnetic resonance (MASNMR) are considered. Both are consistent with the modified random network for glass structure in which modifiers form channels percolating through the network. It is proposed that the mechanisms determining the distribution of bridging and non-bridging oxygen atoms at the glass transition are the same as those that promote ionic transport at lower temperatures in the glass. In particular the results of XAFS and MASNMR can be used to predict the activation energy for ionic transport and the magnitude of the electrical conductivity. Values of these parameters for alkali disilicates are in good agreement with those measured directly from transport properties. |
| doi_str_mv | 10.1080/01418619108204878 |
| format | Article |
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A, Physics of condensed matter. Defects and mechanical properties</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Greaves, G. N.</au><au>Gurman, S. J.</au><au>Catlow, C. R. A.</au><au>Chadwick, A. V.</au><au>Houde-Walter, S.</au><au>Henderson, C. M. B.</au><au>Dobson, B. R.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>A structural basis for ionic diffusion in oxide glasses</atitle><jtitle>Philosophical magazine. A, Physics of condensed matter. Defects and mechanical properties</jtitle><date>1991-11-01</date><risdate>1991</risdate><volume>64</volume><issue>5</issue><spage>1059</spage><epage>1072</epage><pages>1059-1072</pages><issn>0141-8610</issn><eissn>1460-6992</eissn><coden>PMAADG</coden><abstract>The relationships between the environments of cations in alkali silicates measured by X-ray absorption fine structure (XAFS) and magic angle spinning nuclear magnetic resonance (MASNMR) are considered. Both are consistent with the modified random network for glass structure in which modifiers form channels percolating through the network. It is proposed that the mechanisms determining the distribution of bridging and non-bridging oxygen atoms at the glass transition are the same as those that promote ionic transport at lower temperatures in the glass. In particular the results of XAFS and MASNMR can be used to predict the activation energy for ionic transport and the magnitude of the electrical conductivity. Values of these parameters for alkali disilicates are in good agreement with those measured directly from transport properties.</abstract><cop>London</cop><pub>Taylor & Francis Group</pub><doi>10.1080/01418619108204878</doi><tpages>14</tpages></addata></record> |
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| ispartof | Philosophical magazine. A, Physics of condensed matter. Defects and mechanical properties, 1991-11, Vol.64 (5), p.1059-1072 |
| issn | 0141-8610 1460-6992 |
| language | eng |
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| source | Periodicals Index Online; Taylor & Francis Journals Complete |
| subjects | Condensed matter: structure, mechanical and thermal properties Diffusion in solids Exact sciences and technology Physics Self-diffusion and ionic conduction in nonmetals Transport properties of condensed matter (nonelectronic) |
| title | A structural basis for ionic diffusion in oxide glasses |
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