Magnetic Metal Nanoparticles - Synthesis, Properties, Applications in Magnetic Hard Disks and Some of Their Quantum Size Effects
Magnetic Metal Nanoparticles - Synthesis, Properties, Applications in Magnetic Hard Disks and Some of Their Quantum Size Effects
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磁性金属纳米粒子 - 合成、性质、在磁性硬盘中的应用及其一些量子尺寸效应
DOI：
10.1007/978-94-011-4493-3_12
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发表时间：
1999
期刊：
影响因子：
--
通讯作者：
I. Dragieva
中科院分区：
文献类型：
--
作者：
I. Dragieva
本文综述了在溶液中通过高速化学还原法制备纳米颗粒（或超细含硼金属粉末）。用于制备纳米颗粒的公知方法是用碱金属硼氢化物的水溶液作为还原剂化学还原溶解在水中的金属离子[1 - 7]。我们使用该方法作为生产含有元素的纳米颗粒的各种组合物的仪器，所述元素如：Fe、Co、Ni、Li、Mg、Ca、Sr、Zn、Cd。Al、Ti、Zr、Th、Pb、Si、V、Mo、Re、Mn、Cn、Pd、Cr、Sn、Nd、Sm。戴Hf.路易斯安那州首席执行官Pro Y.硼和氢[6].当在水溶液中的化学反应过程中形成新的固态相时。流体动力学状态可显著影响所获得的纳米颗粒的成核和生长速率。尺寸分散性。它们的结构和所制备的组合物中轻元素如氢的含量。通过用NaBH 4化学还原从均匀的盐水溶液合成金属纳米颗粒是这种方法的一个实例，其结果是形成两个新相：含硼和氢的金属纳米颗粒的固相和氢的气相。通常，该反应在具有不同流体动力学状态的两种类型的反应器中进行：具有完全混合的反应器（所谓的tea方法[5，6]）和具有接近理想位移的状态的反应器（所谓的Y方法）[5]。另一个更接近于理想位移状态工作的反应堆是所谓的反重力反应堆[7]。8]。
The present review concentrates on nanoparticles (or superfine boron-containing metal powders) produced by the process of a high rate chemical reduction in solutions. The well known method for the preparation of nanoparticles is the chemical reduction of the metal ions, dissolved in water, with an~ queous solution of an alkaline-metal borohydride as a reducing agent [l-7J. We used this method as an instrument for a production of various compositions of nanoparticles containing elements like: Fe, Co, Ni, Li, Mg, Ca, Sr, Zn, Cd., AI, Ti, Zr, Th, Pb, Si, V, Mo, Re, Mn, Cn, Pd, Cr, Sn, Nd, Sm. Dy. Hf. La. Ceo Pro Y. boron and hydrogen [6J.When'a new solid state phase is formed during a chemical reaction in a water solution. the hydrodynamics regime could considerably influences on the rate of nucleation and growth of nanoparticles obtained. on the size dispersion. on their structure and on a content of a light element as hydrogen in prepared composition.. The synthesis of metal nanoparticles from a homogeneity aqua salt solution by a chemIcal reduction with NaBH4 is an example of such process as a result of whIch two new phases are formeda solid phase of metallic nanoparticles containing boron and hydrogen and a gaseous phase of hydrogen. Often this reaction is carried out in two types of reactors with different hydrodynamics regimes: a reactor with a fully mixing (the so called tea method [5, 6]) and such with a regime close to an ideal displacement (the so called Y method)[5]. Another reactor working more closed to the regime of an ideal displacement is the so called antigravity reactor [7. 8].