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首页> 外文期刊>RSC Advances >Well dispersed silicon nanospheres synthesized by RF thermal plasma treatment and their high thermal conductivity and dielectric constant in polymer nanocomposites
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Well dispersed silicon nanospheres synthesized by RF thermal plasma treatment and their high thermal conductivity and dielectric constant in polymer nanocomposites

机译：通过RF热等离子体处理合成的良好分散的硅纳米球及其在聚合物纳米复合材料中的高导热率和介电常数

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摘要

In this paper, well dispersed Si nanospheres (Si-NSs) were successfully synthesized via a simple and efficient method by using radio-frequency (RF) thermal plasma treatment. Structures and morphologies of the prepared samples were characterized by various techniques, including XRD, EDX, FESEM, HRTEM, SAED, BET and Raman spectroscopy. It is found that the obtained Si-NSs present uniform spherical shape and smooth surface. The effects of experimental parameters (including quenching gas and length of reaction path) on morphology and size distribution of Si particles were investigated. The growth mechanism of Si nanoparticles in the thermal plasma was discussed. Si-NS/phenolic resin (PR) composites were fabricated and their performances including thermal stability, thermal conductivity, and dielectric properties were measured. It indicates the composites exhibit high thermal conductivity (6.2 W m(-1) K-1) and dielectric constants of 106 at 100 Hz, which implies they are applicable for energy storage-capacitors. The high thermal conductivity and dielectric constant can be attributed to their uniform spherical shape and smooth surface, which enable them to disperse uniformly in the polymer matrix.
机译：在本文中，通过使用射频（RF）热等离子体处理，通过简单和有效的方法成功地合成了良好的分散的Si纳米球（Si-NSS）。制备样品的结构和形态的特征在于各种技术，包括XRD，EDX，FESEM，HRTEM，SAED，BET和拉曼光谱。发现得到的Si-NSS存在均匀的球形形状和光滑的表面。研究了实验参数（包括淬火气体和反应路径长度）对Si颗粒形态和尺寸分布的影响。讨论了热血浆中Si纳米粒子的生长机制。制造Si-ns /酚醛树脂（PR）复合材料，并测量它们的性能，包括热稳定性，导热性和介电性质。它表示复合材料表现出高导热率（6.2W m（-1）k-1）和106处的介电常数为100Hz，这意味着它们适用于能量存储电容器。高导热率和介电常数可归因于其均匀的球形形状和光滑表面，使它们能够均匀地分散在聚合物基质中。

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  • 来源
    《RSC Advances》 |2015年第13期|共9页
  • 作者

    Hou Guolin; Cheng Benli; Ding Fei; Yao Mingshui; Cao Yuebin; Hu Peng; Ma Ruixin; Yuan Fangli;

  • 作者单位

    Chinese Acad Sci State Key Lab Multiphase Complex Syst Inst Proc Engn Fuzhou 350002 Peoples R China;

    Univ Sci &

    Technol Beijing Sch Met &

    Ecol Engn Beijing 100083 Peoples R China;

    Chinese Acad Sci State Key Lab Multiphase Complex Syst Inst Proc Engn Fuzhou 350002 Peoples R China;

    Chinese Acad Sci State Key Lab Struct Chem Fujian Inst Res Struct Matter Fuzhou 350002 Peoples R China;

    Chinese Acad Sci State Key Lab Multiphase Complex Syst Inst Proc Engn Fuzhou 350002 Peoples R China;

    Chinese Acad Sci State Key Lab Multiphase Complex Syst Inst Proc Engn Fuzhou 350002 Peoples R China;

    Univ Sci &

    Technol Beijing Sch Met &

    Ecol Engn Beijing 100083 Peoples R China;

    Chinese Acad Sci State Key Lab Multiphase Complex Syst Inst Proc Engn Fuzhou 350002 Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
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