Pore size control of porous silica ceramics by hydrothermal hot-pressing

Kazumichi Yanagisawa, Koji Ioku, Nakamichi Yamasaki

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Porous silica ceramics with homogeneous pore distribution were prepared by the hydrothermal hot-pressing of silica gels. The recovered porous ceramics had high mechanical strengths with large pore volumes. The ceramics prepared at 300 °C and 20 MPa for 1 h with 17.2 mass% water showed the following properties; high compressive strength (60 MPa), low bulk density (0.68 g/cm3), large pore volume (0.98 cm3/g), and uniform pore distribution with average pore size of 65 nm. The average pore diameter of the ceramics was controlled from 25 to 100 nm by selecting hydrothermal hot-pressing conditions and starting silica gels. The formation mechanism of large pores in the silica ceramics could be elucidated by capillary effects.

Original languageEnglish
Pages (from-to)966-971
Number of pages6
JournalNippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan
Volume102
Publication statusPublished - 1994 Oct
Externally publishedYes

Fingerprint

hot pressing
Silica Gel
Silica gel
Hot pressing
Silicon Dioxide
Pore size
Silica
ceramics
silicon dioxide
porosity
Compressive strength
Strength of materials
silica gel
Water
compressive strength
water

ASJC Scopus subject areas

  • Ceramics and Composites

Cite this

Pore size control of porous silica ceramics by hydrothermal hot-pressing. / Yanagisawa, Kazumichi; Ioku, Koji; Yamasaki, Nakamichi.

In: Nippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan, Vol. 102, 10.1994, p. 966-971.

Research output: Contribution to journalArticle

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