Mechanisms of Incipient Chemical Reaction between Ca(OH)2and SiO2under Moderate Mechanical Stressing

Tomoyuki Watanabe, Tetsuhiko Isobe, Mamoru Senna

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

The structure of mechanically induced precursor in an amorphous state between Ca(OH)2and SiO2was determined by solid state MAS and CP/MAS29SiNMR spectroscopies, and the changes in the behavior of crystallization by linear heating were studied by X-ray diffractometry. A large broad Q0peak due to the short-range order of hydrated calcium silicates appeared in the29SiNMR spectra of mechanically induced precursors. The formation of the new ordering is confined in the near-surface region of SiO2particles, as confirmed by comparing MAS and CP/MASNMR spectra. When the amorphous precursor obtained above was subsequently heated, a rapid solid state reaction led to single phasedα-CaSiO3as the final product.

Original languageEnglish
Pages (from-to)284-289
Number of pages6
JournalJournal of Solid State Chemistry
Volume130
Issue number2
DOIs
Publication statusPublished - 1997 May

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Chemical reactions
chemical reactions
solid state
calcium silicates
Calcium silicate
Crystallization
Solid state reactions
X ray diffraction analysis
Spectroscopy
crystallization
Heating
heating
products
spectroscopy
x rays
calcium silicate

ASJC Scopus subject areas

  • Inorganic Chemistry
  • Physical and Theoretical Chemistry
  • Materials Chemistry

Cite this

Mechanisms of Incipient Chemical Reaction between Ca(OH)2and SiO2under Moderate Mechanical Stressing. / Watanabe, Tomoyuki; Isobe, Tetsuhiko; Senna, Mamoru.

In: Journal of Solid State Chemistry, Vol. 130, No. 2, 05.1997, p. 284-289.

Research output: Contribution to journalArticle

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