Synthesis of ceramic nanoparticles with non-equilibrium crystal structures and chemical compositions by controlled thermal plasma processing

被引：11
|
作者：
Ishigaki, Takamasa [1 ]
机构：
[1] Natl Inst Mat Sci, Nano Ceram Ctr, Plasma Proc Grp, Tsukuba, Ibaraki 3050044, Japan
来源：
JOURNAL OF THE CERAMIC SOCIETY OF JAPAN | 2008年 / 116卷 / 1351期
关键词：
nanoparticle synthesis; RF induction thermal plasma; reactor design; titanium oxide; phase selection; nucleation;
D O I：
10.2109/jcersj2.116.462
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The synthesis of functional nanostructured powders has been developed through reactive thermal plasma processing. Nanosized particles of titanium oxide powder with high crystallinity and non-equilibrium chemical composition were synthesised by one-step processing based on the oxidation of solid and liquid precursors. Spherical carbon powders were treated in a reactive thermal plasma. Crystallinity, chemical composition, and surface morphology were changed in plasma-treated carbon powders. Plasma-treated carbon powders were used as the anode of a lithium-ion rechargeable battery, and improvements in discharge capacity and efficiency were recognized. The generation of pulse-modulated RF inductively coupled plasmas (PM-ICPs) was developed for the first time. The non-equilibrium states were recognized at the instances of pulse-on and pulse-off, and the concentration of chemically active radical species was increased. This offers a unique physico-chemical condition for materials processing. (C) 2008 The Ceramic Society of Japan. All rights reserved.
引用
收藏
页码：462 / 470
页数：9
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