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Crystallisation of PFA glasses
Bibliography: leaves 79-81.
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| Format: | Thesis |
| Language: | English |
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Department of Mechanical Engineering
2014
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| _version_ | 1867613478276038656 |
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| access_status_str | Open Access |
| author | Emms, S |
| author2 | Heckroodt, R O |
| author_browse | Emms, S Heckroodt, R O |
| author_facet | Heckroodt, R O Emms, S |
| author_sort | Emms, S |
| collection | Thesis |
| description | Bibliography: leaves 79-81. |
| format | Thesis |
| id | oai:open.uct.ac.za:11427/8485 |
| institution | University of Cape Town (South Africa) |
| language | eng |
| last_indexed | 2026-06-10T12:36:47.206Z |
| license_str | Not specified — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UCTD — University of Cape Town Open Access Repository |
| publishDate | 2014 |
| publishDateRange | 2014 |
| publishDateSort | 2014 |
| publisher | Department of Mechanical Engineering |
| publisherStr | Department of Mechanical Engineering |
| record_format | dspace |
| source_str | UCTD — University of Cape Town Open Access Repository |
| spelling | oai:open.uct.ac.za:11427/8485 Crystallisation of PFA glasses Emms, S Heckroodt, R O Applied Science Bibliography: leaves 79-81. Glasses with various compositions, falling in the CaO-AI20rSi02 and MgO-CaOAI20rSi02 systems were made, using pulverised fuel ash and silica, hydrated lime, kaolin and magnesium carbonate. Titania or ferric oxide and chromia were used as nucleants. Various crystallisation heat treatments were carried out and the nucleation and crystallisation behaviour was studied. A minimum MgO:CaO was found to be necessary for bulk nucleation to occur. The activation energy for viscous flow decreased with increased MgO:CaO ratios. This was accompanied by an increase in the surface crystal growth rates and a decrease in the activation energy for surface crystal growth. Titania also lowered the activation energies for viscous flow and surface crystal growth and caused an increase in the surface crystal growth rates. 2014-10-17T07:31:08Z 2014-10-17T07:31:08Z 1994 Master Thesis Masters MSc http://hdl.handle.net/11427/8485 eng application/pdf Department of Mechanical Engineering Faculty of Engineering and the Built Environment University of Cape Town |
| spellingShingle | Applied Science Emms, S Crystallisation of PFA glasses |
| thesis_degree_str | Master's |
| title | Crystallisation of PFA glasses |
| title_full | Crystallisation of PFA glasses |
| title_fullStr | Crystallisation of PFA glasses |
| title_full_unstemmed | Crystallisation of PFA glasses |
| title_short | Crystallisation of PFA glasses |
| title_sort | crystallisation of pfa glasses |
| topic | Applied Science |
| url | http://hdl.handle.net/11427/8485 |
| work_keys_str_mv | AT emmss crystallisationofpfaglasses |