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超声震荡与电场对冰升华法制备NaNO2纳米粒子的影响

左桂鸿1,2, 李冬妹1, 牟佳佳1, 陈海勇1   

  1. 1. 吉林大学 超硬材料国家重点实验室, 长春 130012; 2. 牡丹江师范学院 物理系, 黑龙江 牡丹江 157000
  • 收稿日期:2007-12-07 修回日期:1900-01-01 出版日期:2008-07-26 发布日期:2008-07-26
  • 通讯作者: 陈海勇

Influences of Ultrasonic Vibration and Electric Field on Preparing NaNO2 Nano-particles by Ice Sublimation Method

ZUO Gui hong1,2, LI Dong mei1, MU Jia jia1, CHEN Hai yong1   

  1. 1. State Key Laboratory of Superhard Materials, Jilin University, Changchun 130012, China; 2. Department of Physics, Mudanjiang Teachers’College, Mudanjiang 157000, Heilongjiang Province, China
  • Received:2007-12-07 Revised:1900-01-01 Online:2008-07-26 Published:2008-07-26
  • Contact: CHEN Hai yong

摘要: 将常规冰升华产物NaNO2纳米粒子在乙醇分散剂中超声震荡, 使小晶粒重新组合, 形成更稳定的方形聚集体, 并在冰升华过程中, 施加一个0.5 kV/cm的垂直电场. 结果表明, 电场导致一部分NaNO2纳米晶超过6 nm, 表现为相互分离的状态. 这是由于电场使NaNO2纳米晶粒沿电场方向被极化, 而同向极化使相邻晶粒间存在一个斥力, 从而导致离散的NaNO2纳米晶粒形成. 

关键词: 冰升华, 电场, NaNO2, 纳米粒子

Abstract: The small crystallites of quasi sphere aggregates NaNO2 nano-particles prepared by normal ice sublimation method in ethanol were reassembled by ultrasonic vibration to form more stable square aggregates. A 0.5 kV/cm electric field vertically was applied to the sample while the ice was subliming. The results show that the electric field made some NaNO2 crystallites exceed 6 nm in size, and to be discrete. We think it is the electric field to polarize the ferroelectric NaNO2 crystallites. And the polarization of adjoining crystallites in the same direction led to the separated configuration. 

Key words: ice sublimation, electric field, NaNO2, nano-particle

中图分类号: 

  • TB383