Morphology and Sintering of CeO_2 Powders Produced by Homogeneous Precipitation Method

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概要

• 論文の詳細を見る

• We examined the preparation condition of ceria (CeO<SUB>2</SUB>) powders through homogeneous precipitation at 90°C and the effect of its morphology on sintering. The synthesized powder had different morphology depending on the condition in homogeneous precipitation method using hexamethylenetetramine (HMT). The coalesced spherulic powder with ca. 0.1μm size was obtained under the condition of Ce concentration of 0.05M with 0.3-0.5 M HMT. In the case of 0.1M Ce solution, the rod-like particles and fibers of CeO<SUB>2</SUB> were obtained. For the synthesis of dense cerium oxide ceramics by pressureless sintering, the starting powders with spherulic shape were useful. The relative density of ceramics was 93% after sintering at 1400 °C for 1h in air. At 1500°C, the oxygen release in CeO<SUB>2</SUB> was assumed. A sintering temperature of 1400°C can be applied for forming CeO<SUB>2</SUB> ceramic by using the spherulic powders through the homogeneous precipitation at the concentration of 0.05 M Ce and 0.3-0.5M HMT.

• 社団法人 粉体粉末冶金協会の論文
• 2003-05-15

著者

• Suzuki Suguru

  Ceramics Research Laboratory Nagoya Institute Of Technology

• Suzuki Suguru

  Ceramic Engineering Research Laboratory Nagoya Institute Of Technology

• Ozawa Masakuni

  Ceramics Res. Lab. Nagoya Inst. Of Technol.

• HIBI Hisayuki

  Ceramics Research Laboratory, Nagoya Institute of Technology

• Hibi Hisayuki

  Ceramics Research Laboratory Nagoya Institute Of Technology

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