Forming of Self-Sustaining Ce_0.9Gd_0.1O_1.95 Film by Aqueous Tape Casting Method

Abstract

Self-sustaining Ce_0.9Gd_0.1O_1.95 film was fabricated by aqueous tape casting method. An aqueous tape casting of dispersion was performed using poly acrylic acid (PAA) as dispersant, poly carboxylate ammonium (PCA) as binder, poly ethylene glycol (PEG) as plasticize, and deionized water as solvent. The rheology of the slurries was evaluated with cone-plate method. The conditions for preparing stable slurries were studied, regarding with solid concentration and ball-milling period, and optimized by viscosity measurements and aging experiments. Green tapes with thickness in the range of 65 to 130 µm were prepared by conditions; solid concentration of 25～26 vol% and gap width of 0.2～0.3mm with moving rate of 45 cm min^-1. Conventional sintering techniques were available for densification, and semitransparent Ce_0.9Gd_0.1O_1.95 film was successfully fabricated by heating a green sheet at 1500 °C in air.