TY - JOUR

T1 - Low toxicity binder systems for tape cast Ce0.9Gd0.1O1.95 laminates

A1 - Klemensø,Trine

A1 - Menon,Mohan

A1 - Ramousse,Severine

AU - Klemensø,Trine

AU - Menon,Mohan

AU - Ramousse,Severine

PB - Pergamon

PY - 2010

Y1 - 2010

N2 - 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.

AB - 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.

KW - Solid Oxide Fuel Cells

KW - Fuel Cells and hydrogen

KW - Brændselsceller og brint

U2 - 10.1016/j.ceramint.2009.10.019

DO - 10.1016/j.ceramint.2009.10.019

JO - Ceramics International

JF - Ceramics International

SN - 0272-8842

IS - 2

VL - 36

SP - 773

EP - 780

ER -