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Thermal Intumescent Characteristics of Heated Sodium Silicate

[+] Author Affiliations
Takeshi Otaka, Yutaka Asako

Tokyo Metropolitan University, Tokyo, Japan

Paper No. IMECE2002-39393, pp. 205-210; 6 pages
  • ASME 2002 International Mechanical Engineering Congress and Exposition
  • Heat Transfer, Volume 1
  • New Orleans, Louisiana, USA, November 17–22, 2002
  • Conference Sponsors: Heat Transfer Division
  • ISBN: 0-7918-3632-0 | eISBN: 0-7918-1691-5, 0-7918-1692-3, 0-7918-1693-1
  • Copyright © 2002 by ASME


A fire barrier material is made of a rubber in which intumescent materials are mixed. Sodium silicate is one of the intumescent materials which intumesces at low temperature. In this report, the thermal intumescent characteristics of water glass and sodium metasilicate are investigated. Thermal intumescent ratio of water glass and sodium metasilicate were measured using a thermo-gravimetry (TG/DTA) with the heating rate in the range from 1 K/min to 99.9 K/min. As the result, it is clarify that thermal intumescent characteristics depend on the heating rate. Thermal intumescent ratio increases with increasing the heating rate. No intumescence was observed under the condition that the heating rate ranges from 1 K/min to 20 K/min.

Copyright © 2002 by ASME
Topics: Sodium



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