Preparation of SiO2-TiO2 graded glass by using high gravity field combined with sol-gel method

Masamichi Nishihara, Takashi Sagawa, Hirotaka Ihara, Rika Nishimura, Susumu Matsuzaki, Tsutomu Mashimo

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


A method to prepare the multi-component oxide glass with graded structure was proposed. This method is based on the facts that colloid particles can sediment during a sol-gel transition process under comparatively low gravity field, and the resultant gel can be converted into glass at lower temperature treatment than a conventional method. The graded structure was formed by centrifuging (10,000 g level) the Si and Ti mixed colloids, and immobilized by removal of solvent at 90 °C. This graded precursor gel was heated to 900 °C to convert into a glass state. The proper condition to prepare the graded glass was examined especially focusing on the growth time of colloids before the centrifugation. A transparent SiO2-TiO2 glass with molecular-scale graded structure was obtained in many trials.

Original languageEnglish
Pages (from-to)1201-1204
Number of pages4
JournalFuntai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
Issue number11
Publication statusPublished - Nov 2000
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Mechanical Engineering
  • Industrial and Manufacturing Engineering
  • Metals and Alloys
  • Materials Chemistry


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