Preparation and corrosion resistance of graded glass coating on PbTe

L. Chen, T. Goto, R. Tu, Ch Guo, T. Hirai

Research output: Contribution to journalConference article

Abstract

Lead telluride (PbTe) is a promising material for the thermoelectric power generation system using combustion heat from municipal solid waste. Because the combustion gas from solid waste incinerator generally contains corrosive substances such as HCl and H2SO4, the corrosion resistance of PbTe becomes important for its thermoelectric application. In the present study, SiO2-B2O3-Na2O-ZnO system glasses were coated on PbTe in order to improve the corrosion resistance. Addition of PbO and TeO2 to this system glass significantly improved the adhesion of the glass as well as the oxidation resistance of glass-coated PbTe. However, the addition of PbO and TeO2 degraded the corrosion resistance of the glass coating because the PbO and TeO2 reacted with HCl at high temperature to form volatile chlorides. In order to incorporate the corrosion resistance and adhesion of glass coating, a two-layer glass was coated on PbTe, in which the inner layer contains 60 mass%PbO·TeO2 while the outer layer contains no PbO·TeO2. Corrosion experiments showed that the glass coating with the graded PbO·TeO2 content exhibited excellent adhesion and corrosion resistance at an O2-HCl-Ar atmosphere.

Original languageEnglish
Pages (from-to)256-261
Number of pages6
JournalMaterials Science Forum
Volume308-311
Publication statusPublished - 1999 Jan 1
EventProceedings of the 1998 5th International Symposium on Functionally Graded Materials, FGM '98 - Dresden, Ger
Duration: 1998 Oct 261998 Oct 29

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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    Chen, L., Goto, T., Tu, R., Guo, C., & Hirai, T. (1999). Preparation and corrosion resistance of graded glass coating on PbTe. Materials Science Forum, 308-311, 256-261.