| Budget Amount *help |
¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000)
Fiscal Year 2014: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2013: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2012: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
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| Outline of Final Research Achievements |
In the spray-drying method, an aqueous solution containing dissolved materials is sprayed inside a furnace so that the materials undergo instant drying to form a powder. If two materials with different solubility exist in the solution, the particle wall is formed by depositing into low solubility material first, then, high solubility material deposited in the inner side continuously. In the present work, I could prepare the hollow spherical particles with size of 1-5 um. The particles were hydroxyapatite (outer surface)/silica (inner surface) compositionally graded hollow spherical particles. The compressive strength of these particles were maximum 17 MPa. The particles indicates a water resistance, was able to hold the water inside. Moreover, it could be suppressed soil-drying by adding the particles into the soil.
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