High temperature mechanical properties of a crystallized BaO-B 2O3-Al2O3-SiO2 glass ceramic for SOFC

Hsiu Tao Chang, Chih Kuang Lin, Chien Kuo Liu

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

2 Scopus citations

Abstract

The high temperature mechanical properties in a glass-ceramic sealant of BaO-B2O3-Al2O3-SiO2 system was studied by four-point bending test at room temperature, 550°C, 600°C, 650°C, and 700°C, to investigate the variation of Young's modulus, flexural strength, and stress relaxation. Weibull statistic analysis was applied to describe the fracture strength of the given glass ceramic. The crystalline phase was produced by controlled heat treatment and analyzed by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The results indicated that the flexural strength was enhanced at high temperatures when the testing temperature was below the glass transition temperature (Tg). This was presumably due to a crack healing effect taking place at high temperature. Significant stress relaxation for the given glass ceramic was observed to generate extremely large deformation without breaking the specimens when the testing temperature was set at 700°C.

Original languageEnglish
Title of host publicationProceedings of the 7th International Conference on Fuel Cell Science, Engineering, and Technology 2009
Pages745-750
Number of pages6
DOIs
StatePublished - 2009
Event7th International Conference on Fuel Cell Science, Engineering, and Technology 2009 - Newport Beach, CA, United States
Duration: 8 Jun 200910 Jun 2009

Publication series

NameProceedings of the 7th International Conference on Fuel Cell Science, Engineering, and Technology 2009

Conference

Conference7th International Conference on Fuel Cell Science, Engineering, and Technology 2009
Country/TerritoryUnited States
CityNewport Beach, CA
Period8/06/0910/06/09

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