Low toxicity binder systems for tape cast Ce0.9Gd0.1O1.95 laminates

Trine Klemensø, Mohan Menon, Severine Ramousse

    Research output: Contribution to journalJournal articleResearchpeer-review

    Abstract

    Conventional binder systems for tape casting contain toxic phthalate plasticizers and butanone (MEK) as part of the solvent. The effects of exchanging the phthalate with a non-toxic alternative, and butanone with ethanol, were studied on laminates of high-green density CGO (Ce0.9Gd0.1O1.95) tapes. Samples were prepared with a binder system containing DBP (dibutyl phthalate) plasticizer and MEK solvent, and with a binder system based on a non-toxic non-phthalate plasticizer and ethanol. In both systems, the weight ratio of plasticizer to the PVB (polyvinyl butyral) binder was varied between 0.4 and 0.7. Substitution to the less toxic binder system had no adverse impacts on the microstructure. In fact, denser packing and improved homogeneity were observed with the non-phthalate-based system at ratio 0.5 indicating improved dispersion in this system. The denser packing also coincided with a maximum in z-shrinkage and molecular weight of the binder system, which could be related to the distribution of the binder system.
    Original languageEnglish
    JournalCeramics International
    Volume36
    Issue number2
    Pages (from-to)773-780
    ISSN0272-8842
    DOIs
    Publication statusPublished - 2010

    Keywords

    • Solid Oxide Fuel Cells
    • Fuel Cells and hydrogen

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