2009 Fiscal Year Final Research Report
High rate synthesis of nano-size powders at non-equilibrium conditions by controlled thermal plasma processing and the complete dispersion of the powders
| Project/Area Number |
19360334
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Material processing/treatments
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| Research Institution | National Institute for Materials Science |
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Principal Investigator |
ISHIGAKI Takamasa National Institute for Materials Science, 生命科学部, 教授 (40343842)
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| Co-Investigator(Kenkyū-buntansha) |
RI Jiguang 独立行政法人物質・材料研究機構, ナノセラミックスセンター, 主任研究員 (90354381)
SATO Kimitoshi 独立行政法人物質・材料研究機構, ナノセラミックスセンター, NIMS ポスドク研究員 (40421408)
KAMIYA Hidehiro 東京農工大学, 大学院・共生科学技術研究院, 教授 (20183783)
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| Project Period (FY) |
2007 – 2009
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| Keywords | プラズマ処理 / ナノ粒子 / 発光特性 / 磁気特性 / 粒子分散 |
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| Research Abstract |
Synthesis of functional nano-structured powders has been developed through reactive thermal plasma processing. Nano-sized titanium oxide powders has been prepared by the oxidation of solid and liquid precursors. The plasma-synthesized TiO_2 nano-particles showed phase preferences different from those synthesized by conventional wet processes. Nano-sized particles of high crystallinity and non-equilibrium chemical composition were formed by one-step via reactive thermal plasma processing. Also, high dispersion behavior of plasma-synthesized nanopowders was recognized. The ultrasonically irradiated suspensions show aggregate sizes close to the primary particle sizes evaluated by an image analysis. Ultrasonic irradiation was shown to be a powerful way to disperse nanoparticles even in concentrated aqueous suspensions.
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