Formation of TiO 2 nanocrystallites in the TiO 2-ZnO-B 2O 3-Al 2O 3 glass-ceramics

Hirokazu Masai, Keisuke Hirakawa, Kazuki Yoshida, Takamichi Miyazaki, Yoshihiro Takahashi, Rie Ihara, Takumi Fujiwara

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)

Abstract

We have examined the structure and the crystallization behavior of the 13TiO 2-xZnO-17Al 2O 3-(70-x)B 2O 3 (TZAB) glass. Coordination number of B 2O 3 and Al 2O 3 is changed by substitution of B 2O 3-ZnO, whereas coordination states of TiO 2 and ZnO are not affected by the substitution. With increasing amount of ZnO, network forming AlO 4 increases instead of network modifying AlO 5 and AlO 6. In the case of B 2O 3, BO 4 unit is preferentially formed with increasing amount of ZnO. The glass-ceramics show selective crystallization of TiO 2, and the precipitated phase of TiO 2 depends on the amount of ZnO. Dendritic-like aggregates of anatase crystallites were precipitated in the glass-ceramic containing lower amount of ZnO, whereas isolated granules of rutile crystallites were precipitated in the glass-ceramic containing higher amount of ZnO. We have demonstrated that the transparency of the glass-ceramic strongly depends on the crystallinity of precipitated crystallites. The crystallization behavior indicates that both main network and the interstitial components were affected by the substitution.

Original languageEnglish
Pages (from-to)3138-3143
Number of pages6
JournalJournal of the American Ceramic Society
Volume95
Issue number10
DOIs
Publication statusPublished - 2012 Oct

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

Fingerprint Dive into the research topics of 'Formation of TiO <sub>2</sub> nanocrystallites in the TiO <sub>2</sub>-ZnO-B <sub>2</sub>O <sub>3</sub>-Al <sub>2</sub>O <sub>3</sub> glass-ceramics'. Together they form a unique fingerprint.

Cite this