{"id":{"repo_id":"vt","oai_identifier":"oai:vtechworks.lib.vt.edu:10919/84900"},"canonical_url":"https://search.dev.ndltd.org/etd/vt/oai:vtechworks.lib.vt.edu:10919/84900","repository":{"repo_id":"vt","name":"Virginia Tech","base_url":"https://vtechworks.lib.vt.edu/oai/request"},"display":{"title":"Study of Pore Development in Silicon Oxycarbide Ceramics to Understand the Microstructural Evolution","abstract":"Silicon oxycarbide (SiOC) is a ceramic obtained through the heating of a polymer precursor, which undergoes partial decomposition to go from an organic polymer to an inorganic ceramic. The microstructure of SiOC is not uniform at the nanometer scale, and contains nanometer sized silicon dioxide, carbon, and silicon carbide. Porous SiOC has shown great promise in applications such as lithium ion batteries, gas separation, and thermal barriers. The microstructure, and thus the properties of the SiOC, is influenced by the initial polymer and the processing conditions. In this thesis, SiOC is fabricated using a base polysiloxane polymer using different gases during heating, different additives that change the initial polymer chemical composition or polymer shape, and polymers with different reactive groups. Porosity was introduced into the SiOC ceramics through either etching the SiOC with hydrofluoric acid, which removes the silicon dioxide and produces pores with diameters less than 20 nanometers, or through decomposition during heating of a certain polymer in a two polymer mixture, producing pores that are dozens of microns in diameter. The effects of the processing parameters on the porosity and pore size are used to understand the differences in the microstructure during pyrolysis.","abstract_html":"Silicon oxycarbide (SiOC) is a ceramic obtained through the heating of a polymer precursor, which undergoes partial decomposition to go from an organic polymer to an inorganic ceramic. The microstructure of SiOC is not uniform at the nanometer scale, and contains nanometer sized silicon dioxide, carbon, and silicon carbide. Porous SiOC has shown great promise in applications such as lithium ion batteries, gas separation, and thermal barriers. The microstructure, and thus the properties of the SiOC, is influenced by the initial polymer and the processing conditions. In this thesis, SiOC is fabricated using a base polysiloxane polymer using different gases during heating, different additives that change the initial polymer chemical composition or polymer shape, and polymers with different reactive groups. Porosity was introduced into the SiOC ceramics through either etching the SiOC with hydrofluoric acid, which removes the silicon dioxide and produces pores with diameters less than 20 nanometers, or through decomposition during heating of a certain polymer in a two polymer mixture, producing pores that are dozens of microns in diameter. The effects of the processing parameters on the porosity and pore size are used to understand the differences in the microstructure during pyrolysis.","abstract_has_math":false,"creators":["Erb, Donald Joseph"],"institution":"Virginia Tech","degree_name":"Master of Science","degree_level":"masters","degree_discipline":"Materials Science and Engineering","degree_department":"Materials Science and Engineering","school":null,"contributors":[],"advisors":[],"committee_chairs":["Lu, Peizhen"],"committee_members":["Clark, David E.","Tallon Galdeano, Carolina"],"year":2018,"date_issued":"2018-08-22","date_published":"2018-08-22","updated_at":"2026-07-22T22:19:12Z","subjects":["Silicon Oxycarbide","Crosslinking","Pyrolysis","Porous Ceramic","Porosity"],"languages":[],"rights":["In Copyright"],"rights_urls":["http://rightsstatements.org/vocab/InC/1.0/"],"identifier_entries":[{"key":"dc:identifier.other","label":"Dc Identifier Other","values":["vt_gsexam:16867"],"render_values":[{"text":"vt_gsexam:16867","href":null,"code":true}]}]},"links":{"outbound_url":"http://hdl.handle.net/10919/84900","outbound_label":"Handle","outbound_source":"dc:identifier.uri"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.committeechair","label":"Committee Chair","values":["Lu, Peizhen"]},{"key":"dc:contributor.committeemember","label":"Committee Member","values":["Clark, David E.","Tallon Galdeano, Carolina"]},{"key":"dc:contributor.department","label":"Department","values":["Materials Science and Engineering"]},{"key":"dc:creator","label":"Author","values":["Erb, Donald Joseph"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.accessioned","label":"Dc Date Accessioned","values":["2018-08-23T08:00:32Z"]},{"key":"dc:date.available","label":"Dc Date Available","values":["2018-08-23T08:00:32Z"]},{"key":"dc:date.issued","label":"Date","values":["2018-08-22"]},{"key":"dc:publisher","label":"Institution","values":["Virginia Tech"]},{"key":"dc:type","label":"Dc Type","values":["Thesis"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Materials Science and Engineering"]},{"key":"thesis:degree_level","label":"Degree Level","values":["masters"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Master of Science"]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["Virginia Polytechnic Institute and State University"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Silicon Oxycarbide","Crosslinking","Pyrolysis","Porous Ceramic","Porosity"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:rights","label":"Dc Rights","values":["In Copyright"]},{"key":"dc:rights.uri","label":"Rights URI","values":["http://rightsstatements.org/vocab/InC/1.0/"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier.other","label":"Dc Identifier Other","values":["vt_gsexam:16867"]},{"key":"dc:identifier.uri","label":"Identifier URI","values":["http://hdl.handle.net/10919/84900"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["Silicon oxycarbide (SiOC) is a ceramic obtained through the heating of a polymer precursor, which undergoes partial decomposition to go from an organic polymer to an inorganic ceramic. 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The effects of the processing parameters on the porosity and pore size are used to understand the differences in the microstructure during pyrolysis."]},{"key":"dc:description.abstractgeneral","label":"General Abstract","values":["Silicon oxycarbide (SiOC) is a ceramic obtained through the heating of a polymer precursor, which undergoes partial decomposition to go from an organic polymer to an inorganic ceramic. The microstructure of SiOC is not uniform at the nanometer scale, and contains nanometer sized silicon dioxide, carbon, and silicon carbide. Porous SiOC has shown great promise in applications such as lithium ion batteries, gas separation, and thermal barriers. The microstructure, and thus the properties of the SiOC, is influenced by the initial polymer and the processing conditions. In this thesis, SiOC is fabricated using a base polysiloxane polymer using different gases during heating, different additives that change the initial polymer chemical composition or polymer shape, and polymers with different reactive groups. Porosity was introduced into the SiOC ceramics through either etching the SiOC with hydrofluoric acid, which removes the silicon dioxide and produces pores with diameters less than 20 nanometers, or through decomposition during heating of a certain polymer in a two polymer mixture, producing pores that are dozens of microns in diameter. The effects of the processing parameters on the porosity and pore size are used to understand the differences in the microstructure during pyrolysis."]},{"key":"dc:description.degree","label":"Dc Description Degree","values":["Master of Science"]},{"key":"dc:format.medium","label":"Dc Format Medium","values":["ETD"]},{"key":"dc:title","label":"Title","values":["Study of Pore Development in Silicon Oxycarbide Ceramics to Understand the Microstructural Evolution"]}]}],"canonical_facts":{"dc:contributor.committeechair":["Lu, Peizhen"],"dc:contributor.committeemember":["Clark, David E.","Tallon Galdeano, Carolina"],"dc:contributor.department":["Materials Science and Engineering"],"dc:creator":["Erb, Donald Joseph"],"dc:date.accessioned":["2018-08-23T08:00:32Z"],"dc:date.available":["2018-08-23T08:00:32Z"],"dc:date.issued":["2018-08-22"],"dc:description.abstract":["Silicon oxycarbide (SiOC) is a ceramic obtained through the heating of a polymer precursor, which undergoes partial decomposition to go from an organic polymer to an inorganic ceramic. The microstructure of SiOC is not uniform at the nanometer scale, and contains nanometer sized silicon dioxide, carbon, and silicon carbide. Porous SiOC has shown great promise in applications such as lithium ion batteries, gas separation, and thermal barriers. The microstructure, and thus the properties of the SiOC, is influenced by the initial polymer and the processing conditions. In this thesis, SiOC is fabricated using a base polysiloxane polymer using different gases during heating, different additives that change the initial polymer chemical composition or polymer shape, and polymers with different reactive groups. Porosity was introduced into the SiOC ceramics through either etching the SiOC with hydrofluoric acid, which removes the silicon dioxide and produces pores with diameters less than 20 nanometers, or through decomposition during heating of a certain polymer in a two polymer mixture, producing pores that are dozens of microns in diameter. 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In this thesis, SiOC is fabricated using a base polysiloxane polymer using different gases during heating, different additives that change the initial polymer chemical composition or polymer shape, and polymers with different reactive groups. Porosity was introduced into the SiOC ceramics through either etching the SiOC with hydrofluoric acid, which removes the silicon dioxide and produces pores with diameters less than 20 nanometers, or through decomposition during heating of a certain polymer in a two polymer mixture, producing pores that are dozens of microns in diameter. The effects of the processing parameters on the porosity and pore size are used to understand the differences in the microstructure during pyrolysis."],"dc:description.degree":["Master of Science"],"dc:format.medium":["ETD"],"dc:identifier.other":["vt_gsexam:16867"],"dc:identifier.uri":["http://hdl.handle.net/10919/84900"],"dc:publisher":["Virginia Tech"],"dc:rights":["In Copyright"],"dc:rights.uri":["http://rightsstatements.org/vocab/InC/1.0/"],"dc:subject":["Silicon Oxycarbide","Crosslinking","Pyrolysis","Porous Ceramic","Porosity"],"dc:title":["Study of Pore Development in Silicon Oxycarbide Ceramics to Understand the Microstructural Evolution"],"dc:type":["Thesis"],"thesis:degree_discipline":["Materials Science and Engineering"],"thesis:degree_level":["masters"],"thesis:degree_name":["Master of Science"],"thesis:institution_name":["Virginia Polytechnic Institute and State University"]},"updated_at":"2026-07-22T22:19:12Z"}