| Budget Amount *help |
¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000)
Fiscal Year 2014: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2013: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2012: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
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| Outline of Final Research Achievements |
In phospho-silicate slags, the composition condition, at which rare-earth elements are bonded selectively with PO4 tetrahedra, is [R2O+R'O]/[P2O5]≦1 in molar ratio, where R is the alkali metal and R' is the alkaline-earth metal. The structure of PO4 networks was characterized by infrared spectroscopy for optimized slag compositions. ICP-MS analysis revealed that rare-earth element and phosphate species were selectively dissolved into ultra-pure water by elution tests.
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