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

Y. Ohtsuki; S. Sakida; Y. Benino; T. Nanba

doi:10.1002/9781118472590.ch16

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

Y. Ohtsuki, S. Sakida, Y. Benino, T. Nanba

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

1 Citation (Scopus)

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 language	English
Title of host publication	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
Publisher	American Ceramic Society
Pages	145-149
Number of pages	5
ISBN (Print)	9781118273746
DOIs	https://doi.org/10.1002/9781118472590.ch16
Publication status	Published - Jan 1 2012
Event	9th 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 2011 → Jul 14 2011

Publication series

Name	Ceramic Transactions
Volume	231
ISSN (Print)	1042-1122

Other

Other	9th 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
Country	Australia
City	Cairns, QLD
Period	7/10/11 → 7/14/11

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

Effect of TiO₂ addition on the distribution of phosphorus associated with phase separation of borosilicate glasses. / Ohtsuki, Y.; Sakida, S.; Benino, Y.; Nanba, T.

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. American Ceramic Society, 2012. p. 145-149 (Ceramic Transactions; Vol. 231).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

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. Ceramic Transactions, vol. 231, American Ceramic Society, pp. 145-149, 9th 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, 7/10/11. https://doi.org/10.1002/9781118472590.ch16

Ohtsuki Y, Sakida S , Benino Y , Nanba T. 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. American Ceramic Society. 2012. p. 145-149. (Ceramic Transactions). https://doi.org/10.1002/9781118472590.ch16

Ohtsuki, Y. ; Sakida, S. ; Benino, Y. ; Nanba, T. / Effect of TiO₂ addition on the distribution of phosphorus associated with phase separation of borosilicate glasses. 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. American Ceramic Society, 2012. pp. 145-149 (Ceramic Transactions).

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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.",

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AB - 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.

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