High-temperature mechanical properties of a solid oxide fuel cell glass sealant in sintered forms

Hsiu Tao Chang, Chih Kuang Lin, Chien Kuo Liu, Szu Han Wu

Research output: Contribution to journalArticlepeer-review

40 Scopus citations

Abstract

High-temperature mechanical properties of a silicate-based glass sealant (GC-9) for planar solid oxide fuel cell have been studied in sintered forms. Ring-on-ring biaxial flexural tests are carried out at room temperature to 800 °C for the sintered GC-9 glass. The results are also compared with those in cast bulk forms. From the force-displacement curves, the glass transition temperature (Tg) of the non-aged, sintered GC-9 glass is estimated to be between 700 °C and 750 °C, while that of the aged one is between 750 °C and 800 °C. Due to a crack healing effect of the residual glass at high temperature, the flexural strength of the sintered GC-9 glass at temperature of 650 °C to Tg point is greater than that at room temperature. At temperature above Tg, the flexural strength and stiffness are considerably reduced to a level lower than the room-temperature one. The sintered GC-9 glass with pores and crystalline phases has a flexural strength lower than the cast bulk one at temperature of 650 °C and below. Due to a greater extent of crystallization, the flexural strength and stiffness of the sintered GC-9 glass are greater than those of the cast bulk one at 700-800 °C.

Original languageEnglish
Pages (from-to)3583-3591
Number of pages9
JournalJournal of Power Sources
Volume196
Issue number7
DOIs
StatePublished - 1 Apr 2011

Keywords

  • High temperature
  • Mechanical properties
  • Planar solid oxide fuel cell
  • Ring-on-ring test
  • Sintered glass sealant

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