Microdefects in nanocrystalline carbon

DENG Wen ZHONG Xiaping XIONG Liangyue LIU Qixiu LONG Qiwei

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Microdefects in nanocrystalline carbon

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- Microdefects in nanocrystalline carbon
- NUCLEAR TECHNIQUES Issue 2, (1998)
- 作者机构：
  
  1. 广西大学
  2. 中国科学院核分析技术联合开放研究实验室
  3. 中国科学院金属研究所
  4. 广西大学中国科学院核分析技术联合开放研究实验室中国科学院金属研究所
- 作者简介：
- 基金信息：
- DOI：
  CLC： TL375
- Published：01 February 1998
- 稿件说明：
移动端阅览
[1]邓文,钟夏平,熊良钺,刘起秀,龙期威.纳米碳中的微观缺陷结构特征[J].核技术,1998(02):94-97.

DENG Wen ZHONG Xiaping XIONG Liangyue LIU Qixiu LONG Qiwei. Microdefects in nanocrystalline carbon[J]. Nuclear techniques, 1998, (2).
[1]邓文,钟夏平,熊良钺,刘起秀,龙期威.纳米碳中的微观缺陷结构特征[J].核技术,1998(02):94-97. DOI：

DENG Wen ZHONG Xiaping XIONG Liangyue LIU Qixiu LONG Qiwei. Microdefects in nanocrystalline carbon[J]. Nuclear techniques, 1998, (2). DOI：

摘要

测量了定向石墨和纳米碳的正电子寿命谱。结果表明，热解法制备的纳米碳存在开空间小于单空位的自由体积以及开空间相当于约１０个空位聚集体的微孔洞。比较了热解法制备的纳米碳、ＵＦＰ冷压法制备的纳米Ｆｅ和纳米ＴｉＯ２以及非晶晶化法制备的纳米ＮｉＰ的缺陷结构特征，结果为纲米ＮｉＰ中缺陷的电子密度最高，纳米Ｆｅ和纳米ＴｉＯ２的次之，纳米碳的最低；纳米碳中的缺陷浓度最高，纳米Ｆｅ和纳米ＴｉＯ２的次之，纳米ＮｉＰ的最低。在纳米碳中没有观察到由多个晶粒围成的大孔洞

Abstract

The positron lifetime spectra of directional graphite and nanocrystalline carbon have been measured. Two kinds of microdefect were found in the nanocrystalline carbon prepared by the heat- dissolve method:free volumes （with a size smaller than that of a monovacancy） and microvoids （with a size of about ten monovacancies）. The lifetimes measured

and the corresponding interfacial defects in the samples are discussed in comparison with the nanocrystalline iron and TiO2 materials

prepared by " compacting ultrafine powders" method and the nanocrystalline NiP material prepared by the crystallization method.

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Related Author

3 Wang Shuhe 3 Guo Jianting 3 Long Qiwei 2

2 Xiong Liangyue 2

Deng Wen 1

3 1

龙期威

Ning QI

Nan LI

Zhiquan CHEN

Related Institution

Guangxi University, Nanning 530004) 2

中国科学院国际材料物理中心

广西大学中国科学院国际材料物理中心中国科学院金属研究所

Hubei Nuclear Solid Physics Key Laboratory, School of Physics and Technology, Wuhan University

Physics Department, Guangxi University, Nanning 530004) 2

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