Anomalous velocity change of surface wave near the gelation point

Hirotaka Okabe, Keiichi Kuboyama, Kazuhiro Hara, Shoichi Kai

Research output: Contribution to journalConference articlepeer-review

1 Citation (Scopus)


We studied the properties of surface waves during the gelation process of tungstic acid and gelatin and silica gel by the time resolved surface wave measurements. The anomaly is clearly shown in the change of the wave number exponent x (ω to approximately kx, the values 1.5 and 1.0 indicate surface tension and elastic wave, respectively). x of the tungstic acid was about 1.4 in the sol state and rapidly decreased to 1.0 at the gelation point. x of gelatin was about 1.4 (same as tungstic acid) in the sol state and decreased gradually after the gelation point. On the other hand, x of silica gel remained near 1.5 after the gelation point.

Original languageEnglish
Pages (from-to)73-76
Number of pages4
JournalPhysica B: Condensed Matter
Publication statusPublished - Mar 1999
EventProceedings of the 1998 9th International Conference on Phonon Scattering in Condensed Matter, PHONONS 98 - Lancaster, Great Britain
Duration: Jul 26 1998Jul 31 1998

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering


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