セリアジルコニア系粉末の共沈法による合成と分光特性評価 Synthesis and Optical Characteristics Evaluation for Ceria-zirconia Powders by Coprecipitation Method

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We investigated the optical properties for CeO<SUB>2</SUB>-ZrO<SUB>2</SUB> system powders synthesized by coprecipitation method and heated at 900°C. For x=0.4 to 0.7 in Zr<SUB>x</SUB>Ce<SUB>1-x</SUB>O<SUB>2</SUB>, XRD revealed two phases existed: Ce-rich CeO<SUB>2</SUB>-ZrO<SUB>2</SUB> solid solution with cubic fluorite structure and Zr-rich CeO<SUB>2</SUB>-ZrO<SUB>2</SUB> solid solution with tetragonal pseudo-fluorite structure. For x=0.2 to 0.8, b<SUP>∗</SUP> values showed about 40, and vivid yellow powders were obtained. Diffuse reflectance spectra of the powder in the UV region showed the broad shoulder-type band at 320-350 nm, which is assigned to interband transitions in CeO<SUB>2</SUB>. The Zr-doping in CeO<SUB>2</SUB> extended the light absorption range by the interband transitions into visible light region. The light with wavelengths corresponding to purple and blue were absorbed, so that the powders showed yellow corresponding to the complementary color.

We investigated the optical properties for CeO<SUB>2</SUB>-ZrO<SUB>2</SUB> system powders synthesized by coprecipitation method and heated at 900°C. For x=0.4 to 0.7 in Zr<SUB>x</SUB>Ce<SUB>1-x</SUB>O<SUB>2</SUB>, XRD revealed two phases existed: Ce-rich CeO<SUB>2</SUB>-ZrO<SUB>2</SUB> solid solution with cubic fluorite structure and Zr-rich CeO<SUB>2</SUB>-ZrO<SUB>2</SUB> solid solution with tetragonal pseudo-fluorite structure. For x=0.2 to 0.8, b<SUP>∗</SUP> values showed about 40, and vivid yellow powders were obtained. Diffuse reflectance spectra of the powder in the UV region showed the broad shoulder-type band at 320-350 nm, which is assigned to interband transitions in CeO<SUB>2</SUB>. The Zr-doping in CeO<SUB>2</SUB> extended the light absorption range by the interband transitions into visible light region. The light with wavelengths corresponding to purple and blue were absorbed, so that the powders showed yellow corresponding to the complementary color.

収録刊行物

  • 粉体および粉末冶金

    粉体および粉末冶金 59(2), 75-79, 2012-02-15

    一般社団法人 粉体粉末冶金協会

参考文献:  7件中 1-7件 を表示

各種コード

  • NII論文ID(NAID)
    10030479837
  • NII書誌ID(NCID)
    AN00222724
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    05328799
  • NDL 記事登録ID
    023549540
  • NDL 請求記号
    Z17-274
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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