Parasitic amorphous on single-domain crystal: Structural observations of silicate glass-ceramics

Yoshihiro Takahashi, Yoshiki Yamazaki, Rie Ihara, Takumi Fujiwara

研究成果: Article査読

17 被引用数 (Scopus)

抄録

Glass-ceramics (GCs) are materials obtained from the crystallisation of functional phases in glass, and have a structure that the crystallised phase embedded in the glass matrix. Glass-forming oxides are commonly added to the functional phases to improve the stability of precursor glass; however, the issue of glass-ceramics permitting the presence of residual phases resulting from addition is required to be clarified. To elucidate this issue, we prepared 'perfectly surface-crystallised' GC consisting of fresnoite-type Sr2 TiSi2 O8 from a non-stoichiometric glass and performed texture/morphology observations. Numerous SiO2-rich binodal-like nanospheres (∼10 nm) were parasitic on the fresnoite single-crystal domains. The parasitic texture is considered to form via the following process: (i) binodal-type phase separation into stoichiometric fresnoite (crystalline matrix) and SiO2-rich phases (amorphous nanoparticles) and (ii) single-domain formation by surface crystallisation in the matrix. Furthermore, in terms of texture, the resulting GC differs from the GCs reported to date, i.e., inverse GC.

本文言語English
論文番号1147
ジャーナルScientific reports
3
DOI
出版ステータスPublished - 2013

ASJC Scopus subject areas

  • General

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