Ion-exchange Reaction of Hydroxyapatites with Eu3+ and Tb3+ Ions
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概要
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Ion-exchange reaction of three types of synthetic hydroxyapatites was attempted with Eu<SUP>3+</SUP> and Tb<SUP>3+</SUP> ions for the purpose of preparing phosphors. The ion-exchange reaction was observed when the concentration of Eu<SUP>3+</SUP> and Tb<SUP>3+</SUP> nitrate solutions was less than 10 mmol/dm<SUP>3</SUP>, however, in the case of higher concentrated solution hydroxyapatites were dissolved partly to yield EuPO<SUB>4</SUB>⋅H<SUB>2</SUB>O and TbPO<SUB>4</SUB>⋅H<SUB>2</SUB>O. The emission intensity of the ion-exchanged products depended not only on the uptake amount of Eu<SUP>3+</SUP> and Tb<SUP>3+</SUP> ions but also on the Ca/ (P+C) ratio of the starting HAps.
- 日本イオン交換学会の論文
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