Effect of Al element on the strength development of calcite and silica gel composites on hydrothermal processing

H. Imaizumi, H. Maeda, Hideki Ishida

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Calcite and silica gel composites prepared by sol gel technique were hydrothermally solidified under a saturated steam pressure. The composites were fabricated by calcite and tetraethoxysilane (TEOS) without or with AlCl 3·6H2O. The silica gel particles with several hundreds nm in diameter were observed around the surface of the calcite particles before the hydrothermal processing. The bending strengths of the hydrothermally solidified materials without Al element were relatively low even after the hydrothermal processing. In contrast, the bending strengths of the hydrothermally solidified materials with Al element increased up to 6.0 MPa after 10 h of hydrothermal processing at 200 °C. The SEM photographs of the hydrothermally solidified samples with Al element showed that silica gel particles are converted to platy-like deposit during the hydrothermal processing. The platy-like deposit formed around the calcite particles are estimated to act as a binder between the calcite particles, resulting in the development of the strength.

Original languageEnglish
Title of host publication2nd International Symposium on Aqua Science, Water Resource and Low Carbon Energy
Pages272-275
Number of pages4
DOIs
Publication statusPublished - 2010 Dec 1
Event2nd International Symposium on Aqua Science, Water Resource and Low Carbon Energy - Sanya, China
Duration: 2009 Dec 72009 Dec 10

Publication series

NameAIP Conference Proceedings
Volume1251
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Other

Other2nd International Symposium on Aqua Science, Water Resource and Low Carbon Energy
Country/TerritoryChina
CitySanya
Period09/12/709/12/10

Keywords

  • Calcite
  • Hydrothermal solidification
  • Sol gel technique

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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