\"The goal of this work was to connect the network structures of phosphate and borophosphate glasses to the compositional dependence of properties related to biomedical applications. The glasses were characterized by a variety of techniques, including phosphate ion chromatography, Raman spectroscopy, and 11B and 31P Magic Angle Spinning Nuclear Magnetic Resonance spectroscopy, which provide qualitative and quantitative information about the phosphate and borate moieties that constitute the network structures. The systematic addition of borate to a phosphate glass initially creates tetrahedral borate sites that replace P-O-P linkages with B-O-P linkages, and the properties of the resulting borophosphate glasses can be understood by modeling the number of bridging oxygen linkages between the borate and phosphate units; there are systematic increases in glass transition temperature with increases in the number of bridging oxygens per network former. The network structure also affects the dissolution rates of the glasses, but the nature of the crosslinking bonds is more important than their numbers. The substitution of SrO for CaO also decreases the dissolution rates of both Na-Ca/Sr-metaphosphate glasses as well as the borophosphate glasses, which are of interest for the use in biomedical applications. Finally, the systematic substitution of P2O5 for B2O3 in a series of Na-Ca/Sr-borophosphate glasses affects the dissolution rates of the glass in simulated body fluid, the pH of the SBF, and the nature of the phosphate phases that precipitate on the glass surface. It remains to be seen if these bioactive responses could be used to design new biomedical devices\"--Abstract, p. iv
","abstract_html":"<p>"The goal of this work was to connect the network structures of phosphate and borophosphate glasses to the compositional dependence of properties related to biomedical applications. The glasses were characterized by a variety of techniques, including phosphate ion chromatography, Raman spectroscopy, and <sup>11</sup>B and <sup>31</sup>P Magic Angle Spinning Nuclear Magnetic Resonance spectroscopy, which provide qualitative and quantitative information about the phosphate and borate moieties that constitute the network structures. The systematic addition of borate to a phosphate glass initially creates tetrahedral borate sites that replace P-O-P linkages with B-O-P linkages, and the properties of the resulting borophosphate glasses can be understood by modeling the number of bridging oxygen linkages between the borate and phosphate units; there are systematic increases in glass transition temperature with increases in the number of bridging oxygens per network former. The network structure also affects the dissolution rates of the glasses, but the nature of the crosslinking bonds is more important than their numbers. The substitution of SrO for CaO also decreases the dissolution rates of both Na-Ca/Sr-metaphosphate glasses as well as the borophosphate glasses, which are of interest for the use in biomedical applications. Finally, the systematic substitution of P<sub>2</sub>O<sub>5</sub> for B<sub>2</sub>O<sub>3</sub> in a series of Na-Ca/Sr-borophosphate glasses affects the dissolution rates of the glass in simulated body fluid, the pH of the SBF, and the nature of the phosphate phases that precipitate on the glass surface. It remains to be seen if these bioactive responses could be used to design new biomedical devices"--Abstract, p. iv</p>","abstract_has_math":false,"creators":["Freudenberger, Parker Tracy"],"institution":"Missouri University of Science and Technology","degree_name":"Ph. D. in Materials Science and Engineering","degree_level":null,"degree_discipline":null,"degree_department":null,"school":null,"contributors":[],"advisors":[],"committee_chairs":[],"committee_members":[],"year":null,"date_issued":"","date_published":null,"updated_at":"2026-07-24T03:18:26Z","subjects":["Materials Science and Engineering"],"languages":[],"rights":[],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"https://scholarsmine.mst.edu/doctoral_dissertations/3258","outbound_label":"Repository record","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:creator","label":"Author","values":["Freudenberger, Parker Tracy"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:type","label":"Dc Type","values":["Dissertation - Open Access"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Ph. D. in Materials Science and Engineering"]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["Missouri University of Science and Technology"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Materials Science and Engineering"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["https://scholarsmine.mst.edu/doctoral_dissertations/3258"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["\"The goal of this work was to connect the network structures of phosphate and borophosphate glasses to the compositional dependence of properties related to biomedical applications. The glasses were characterized by a variety of techniques, including phosphate ion chromatography, Raman spectroscopy, and 11B and 31P Magic Angle Spinning Nuclear Magnetic Resonance spectroscopy, which provide qualitative and quantitative information about the phosphate and borate moieties that constitute the network structures. The systematic addition of borate to a phosphate glass initially creates tetrahedral borate sites that replace P-O-P linkages with B-O-P linkages, and the properties of the resulting borophosphate glasses can be understood by modeling the number of bridging oxygen linkages between the borate and phosphate units; there are systematic increases in glass transition temperature with increases in the number of bridging oxygens per network former. The network structure also affects the dissolution rates of the glasses, but the nature of the crosslinking bonds is more important than their numbers. The substitution of SrO for CaO also decreases the dissolution rates of both Na-Ca/Sr-metaphosphate glasses as well as the borophosphate glasses, which are of interest for the use in biomedical applications. Finally, the systematic substitution of P2O5 for B2O3 in a series of Na-Ca/Sr-borophosphate glasses affects the dissolution rates of the glass in simulated body fluid, the pH of the SBF, and the nature of the phosphate phases that precipitate on the glass surface. It remains to be seen if these bioactive responses could be used to design new biomedical devices\"--Abstract, p. iv
"]},{"key":"dc:title","label":"Title","values":["Phosphate and Borophosphate Glasses for optical and Biomedical Applications"]}]}],"canonical_facts":{"dc:creator":["Freudenberger, Parker Tracy"],"dc:description.abstract":["\"The goal of this work was to connect the network structures of phosphate and borophosphate glasses to the compositional dependence of properties related to biomedical applications. The glasses were characterized by a variety of techniques, including phosphate ion chromatography, Raman spectroscopy, and 11B and 31P Magic Angle Spinning Nuclear Magnetic Resonance spectroscopy, which provide qualitative and quantitative information about the phosphate and borate moieties that constitute the network structures. The systematic addition of borate to a phosphate glass initially creates tetrahedral borate sites that replace P-O-P linkages with B-O-P linkages, and the properties of the resulting borophosphate glasses can be understood by modeling the number of bridging oxygen linkages between the borate and phosphate units; there are systematic increases in glass transition temperature with increases in the number of bridging oxygens per network former. The network structure also affects the dissolution rates of the glasses, but the nature of the crosslinking bonds is more important than their numbers. The substitution of SrO for CaO also decreases the dissolution rates of both Na-Ca/Sr-metaphosphate glasses as well as the borophosphate glasses, which are of interest for the use in biomedical applications. Finally, the systematic substitution of P2O5 for B2O3 in a series of Na-Ca/Sr-borophosphate glasses affects the dissolution rates of the glass in simulated body fluid, the pH of the SBF, and the nature of the phosphate phases that precipitate on the glass surface. It remains to be seen if these bioactive responses could be used to design new biomedical devices\"--Abstract, p. iv
"],"dc:identifier":["https://scholarsmine.mst.edu/doctoral_dissertations/3258"],"dc:subject":["Materials Science and Engineering"],"dc:title":["Phosphate and Borophosphate Glasses for optical and Biomedical Applications"],"dc:type":["Dissertation - Open Access"],"thesis:degree_name":["Ph. D. in Materials Science and Engineering"],"thesis:institution_name":["Missouri University of Science and Technology"]},"updated_at":"2026-07-24T03:18:26Z"}