A large amount synthesis of nanopowder using modulated induction thermal plasmas synchronized with intermittent feeding of raw materials

A large amount synthesis of nanopowder using modulated induction thermal plasmas synchronized with intermittent feeding of raw materials
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使用调制感应热等离子体与原料间歇进料同步大量合成纳米粉末

DOI:
10.1088/1742-6596/406/1/012001
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发表时间:
2012
期刊:
J.Phys.Conf.Ser.
影响因子:
--
通讯作者:
K.Nakamura
K.Nakamura
中科院分区:
--
文献类型:
--
作者:
Y.Tanaka;T.Tsuke;W.Guo;Y.Uesugi;T.Ishijima;S.Watanabe;K.Nakamura

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提出了一种利用Ar-O2脉冲调制感应热等离子体(PMITP)直接蒸发钛粉大量合成纳米二氧化钛(TiO 2)的方法。为实现纳米粉体的大量合成,将PMITP法与原料粉末的间歇式、大负荷加料以及急冷气体喷射相结合。间歇粉末供给与维持PMITP的线圈电流的调制同步,以使注入的粉末完全蒸发。通过FE-SEM和XRD对所开发的方法合成的颗粒进行了分析。结果表明,通过20-kW PMITP以12.3 g min-1的重负载速率合成的颗粒具有与以4.2 g min-1的轻负载速率合成的颗粒相似的平均直径约40 nm的粒度分布。
A large amount synthesis method for titanium dioxide (TiO 2) nanopowder is proposed by direct evaporation of titanium powders using Ar-O 2 pulse-modulated induction thermal plasma (PMITP). To realize a large amount synthesis of nanopowder, the PMITP method was combined with the intermittent and heavy load feeding of raw material powder, as well as the quenching gas injection. The intermittent powder feeding was synchronized with the modulation of the coil current sustaining the PMITP for complete evaporation of the injected powder. Synthesized particles by the developed method were analyzed by FE-SEM and XRD. Results indicated that the synthesized particles by the 20-kW PMITP with a heavy loading rate of 12.3 g min− 1 had a similar particle size distribution with the mean diameter about 40 nm to those with light loading of 4.2 g min− 1.
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