Tape Casting and Crystallization Kinetics of Ce0.8Y0.2O1.9

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概要

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• An aqueous tape casting of Ce0.8Y0.2O1.9 (YDC) ceramics was developed using poly(acrylic acid) (PAA) as a dispersant, poly(vinyl alcohol) (PVA) as a binder, poly(ethylene glycol) (PEG) as a plasticizer, and deionized water as a solvent. The surface properties of YDC powder with and without PAA dispersant were characterized by zeta potential. The rheological of the YDC slurries was evaluated with a rotary viscometer. The zeta potential measurement showed that the isoelectric point for YDC powders in the absence of dispersant had a pH value of 3.35. The experiment results showed that the pH value greatly affects the rheology of the slurry. In the presence of 2 wt % PAA dispersant, 55 wt % YDC powders exhibited shear thinning behavior, indicating that YDC slurry was homogenous and well stabilized. With an appropriate formulate, homogeneous, smooth, and defect-free green tapes were successfully obtained. Moreover, the crystallization kinetics of YDC powders prepared by the coprecipitation process has also been investigated in this study. The activation energy of crystallization was calculated on the basis of differential scanning calorimetry (DSC) at different heating rates. The activation energy of crystallization presented a value of 192.8 kJ/mol.

• 2008-07-25

著者

• Liu Biing-lang

  Department Of Chemical Engineering Wu Feng Institute Of Technology

• Fu Yen-pei

  Department Of Materials Science And Engineering National Dong Hwa University

• Tseng Chien-Wei

  Department of Materials Science and Engineering, National Dong-Hwa University, Shou-Feng, Hualien 974, Taiwan

• Wen Shaw-Bing

  Meiho Institute of Technology, Neipu, Pingtung 912, Taiwan

• Tsai Feng-Yi

  Department of Materials Science and Engineering, National Dong Hwa University, Shou-Feng, Hualien 974, Taiwan

• Tsai Feng-Yi

  Department of Materials Science and Engineering, National Dong-Hwa University, Shou-Feng, Hualien 974, Taiwan

• Hsu Chin-Shang

  Material and Chemical Research Laboratories, Industrial Technology Research Institute, Hsinchu 300, Taiwan

• Liu Biing-Lang

  Department of Chemical Engineering, Wu Feng Institute of Technology, Ming Hsiung, Chiayi 621, Taiwan

• Fu Yen-Pei

  Department of Materials Science and Engineering, National Dong-Hwa University, Shou-Feng, Hualien 974, Taiwan

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