熊本県下扇原遺跡出土古代ベンガラのキャラクタリゼーション

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タイトル別名
  • Characterization of Ancient Red Iron Oxides Excavated from the Shimo-ohgibaru Archaeological Site in Kumamoto, Japan
  • クマモト ケンカセン ゲン イセキ シュツド コダイ ベンガラ ノ キャラクタリゼーション

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抄録

To clarify the detailed features of the red bengala samples excavated from the Shimo-ohgibaru archaeological site in the late Yayoi period (2nd to 3rd century A.D.) from the viewpoint of materials science, colorimetric measurements, X-ray fluorescence analyses, X-ray diffraction measurements, transmission electron microscope observations, and surface area measurements of the ancient bengala samples were achieved. The ancient bengala sample was found to be high purity α - Fe2O3. The features of the color tone and particle size of the ancient bengala were clarified by comparing with those of commercially available bengala, Fukiya bengala, and synthesized α-Fe2O3. In addition, the starting materials and synthesis processes of the ancient bengala were discussed by applying the elutriation experiments of representative natural hematite and heat-treated natural iron hydroxide (Oniita).

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