Non-silicate porous glasses obtained by the leaching of borate-rich glasses

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dc.contributor.advisorHeckroodt, R Oen_ZA
dc.contributor.authorDe Villiers, Daniel Roberten_ZA
dc.date.accessioned2016-10-27T14:22:41Z
dc.date.available2016-10-27T14:22:41Z
dc.date.issued1985en_ZA
dc.descriptionBibliography: pages 62-65.en_ZA
dc.description.abstractGlasses of the composition Na₂O-B₂O₃-X-Y and Na₂O-B₂O₃-Al₂o₃-X-Y were made where X and Y are two of the oxides CeO₂, HfO₂, ThO₂,Y₂O₃,ZrO₂ or Ga₂O₃. The glasses were either quenched or heat treated to promote phase separation and/or crystallization. The materials were subsequently leached in distilled water for periods of up to 96 hours. Leaching resulted in porous glasses or porous crystalline materials. The porous materials had high surface areas and good alkali resistance. A wide variety of compositions of these porous materials had BET surface areas between 100 and 413 m²/g. Selected porous glasses were chemically analysed. The heat resistances of two porous glasses were evaluated by observing the temperatures necessary for densification. Electron micrographs and X-ray diffraction scans were taken where necessary. Part of the glass forming regions for quenched samples of the system Na₂O-B₂O₃-Ga₂O₃-Y₂O₃ having Ga₂O₃ : Y₂O₃ ratios of either 3 : 1 or 3 : 2 were investigated. Part of the glass forming region for quenched samples of the Na₂O-B₂O₃-Y₂O₃ system was also investigated.en_ZA
dc.identifier.apacitationDe Villiers, D. R. (1985). <i>Non-silicate porous glasses obtained by the leaching of borate-rich glasses</i>. (Thesis). University of Cape Town ,Faculty of Engineering & the Built Environment ,Centre for Materials Engineering. Retrieved from http://hdl.handle.net/11427/22327en_ZA
dc.identifier.chicagocitationDe Villiers, Daniel Robert. <i>"Non-silicate porous glasses obtained by the leaching of borate-rich glasses."</i> Thesis., University of Cape Town ,Faculty of Engineering & the Built Environment ,Centre for Materials Engineering, 1985. http://hdl.handle.net/11427/22327en_ZA
dc.identifier.citationDe Villiers, D. 1985. Non-silicate porous glasses obtained by the leaching of borate-rich glasses. University of Cape Town.en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - De Villiers, Daniel Robert AB - Glasses of the composition Na₂O-B₂O₃-X-Y and Na₂O-B₂O₃-Al₂o₃-X-Y were made where X and Y are two of the oxides CeO₂, HfO₂, ThO₂,Y₂O₃,ZrO₂ or Ga₂O₃. The glasses were either quenched or heat treated to promote phase separation and/or crystallization. The materials were subsequently leached in distilled water for periods of up to 96 hours. Leaching resulted in porous glasses or porous crystalline materials. The porous materials had high surface areas and good alkali resistance. A wide variety of compositions of these porous materials had BET surface areas between 100 and 413 m²/g. Selected porous glasses were chemically analysed. The heat resistances of two porous glasses were evaluated by observing the temperatures necessary for densification. Electron micrographs and X-ray diffraction scans were taken where necessary. Part of the glass forming regions for quenched samples of the system Na₂O-B₂O₃-Ga₂O₃-Y₂O₃ having Ga₂O₃ : Y₂O₃ ratios of either 3 : 1 or 3 : 2 were investigated. Part of the glass forming region for quenched samples of the Na₂O-B₂O₃-Y₂O₃ system was also investigated. DA - 1985 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 1985 T1 - Non-silicate porous glasses obtained by the leaching of borate-rich glasses TI - Non-silicate porous glasses obtained by the leaching of borate-rich glasses UR - http://hdl.handle.net/11427/22327 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/22327
dc.identifier.vancouvercitationDe Villiers DR. Non-silicate porous glasses obtained by the leaching of borate-rich glasses. [Thesis]. University of Cape Town ,Faculty of Engineering & the Built Environment ,Centre for Materials Engineering, 1985 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/22327en_ZA
dc.language.isoengen_ZA
dc.publisher.departmentCentre for Materials Engineeringen_ZA
dc.publisher.facultyFaculty of Engineering and the Built Environment
dc.publisher.institutionUniversity of Cape Town
dc.subject.otherMaterials Engineeringen_ZA
dc.titleNon-silicate porous glasses obtained by the leaching of borate-rich glassesen_ZA
dc.typeMaster Thesis
dc.type.qualificationlevelMasters
dc.type.qualificationnameMSc (Applied Science)en_ZA
uct.type.filetypeText
uct.type.filetypeImage
uct.type.publicationResearchen_ZA
uct.type.resourceThesisen_ZA
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