Effect of TiO2 addition on the distribution of phosphorus associated with phase separation of borosilicate glasses

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Abstract

Behavior of phosphorus associated with phase separation and the effect of TiO2 addition on the phosphorus distribution were investigated in Na2O-B2O3-SiO2 ternary glass system. After heat treatment, phase separation by spinodal decomposition was commonly observed. In the phase separation of TiO2-free glasses, phosphorus was preferentially distributed into B2O3-rich phase, and after TiO2 addition, phosphorus distribution into SiO 2-rich phase was also observed. With increasing TiO2 content, the amount of phosphorus distributed into SiO2-rich phases increased up to 90%. 31P MAS NMR indicated that phosphorus in the glasses was mainly present in negatively-charged Q2 units with terminal oxygen atoms, and in the TiO2-containing glasses, Q 1 or Q0 units containing P-O-Ti bond were confirmed. Despite the formation of negatively-charged Q1 or Q0 units, phosphorus was distributed into SiO2-rich phase, which was due to the distribution of Ti4+ ions with higher coordination numbers acting as network modifiers.

Original languageEnglish
Title of host publicationProcessing, Properties, and Applications of Glass and Optical Materials - Proceedings of the 9th International Conference on Advances in the Fusion and Processing of Glass, AFPG9
PublisherAmerican Ceramic Society
Pages145-149
Number of pages5
ISBN (Print)9781118273746
DOIs
Publication statusPublished - Jan 1 2012
Event9th International Conference on Advances in the Fusion and Processing of Glass, AFPG9 and Symposium 15 - Structure, Properties and Photonic Applications of Glasses Held during PACRIM-9 - Cairns, QLD, Australia
Duration: Jul 10 2011Jul 14 2011

Publication series

NameCeramic Transactions
Volume231
ISSN (Print)1042-1122

Other

Other9th International Conference on Advances in the Fusion and Processing of Glass, AFPG9 and Symposium 15 - Structure, Properties and Photonic Applications of Glasses Held during PACRIM-9
CountryAustralia
CityCairns, QLD
Period7/10/117/14/11

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

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    Ohtsuki, Y., Sakida, S., Benino, Y., & Nanba, T. (2012). Effect of TiO2 addition on the distribution of phosphorus associated with phase separation of borosilicate glasses. In Processing, Properties, and Applications of Glass and Optical Materials - Proceedings of the 9th International Conference on Advances in the Fusion and Processing of Glass, AFPG9 (pp. 145-149). (Ceramic Transactions; Vol. 231). American Ceramic Society. https://doi.org/10.1002/9781118472590.ch16