碳纳米管/金刚石复合材料的场发射特性

董建会; 单 云

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碳纳米管/金刚石复合材料的场发射特性

论文 | 更新时间：2020-08-12

- 碳纳米管/金刚石复合材料的场发射特性
- Field Emission Property of Carbon Nanotubes/Diamond Composite
- 发光学报 2010年31卷第4期页码：595-598
- 作者机构：
  
  1. 中北大学理学院物理系, 山西太原 030051
  2. 昆山国力电真空有限公司, 江苏昆山,215316
- 作者简介：
- 基金信息：
- DOI：
  中图分类号： TN873.95;O462.4
- 收稿日期：2009-11-24，
  
  修回日期：2010-03-07，
  
  网络出版日期：2010-08-27，
  
  纸质出版日期：2010-08-27
- 稿件说明：
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董建会, 单云. 碳纳米管/金刚石复合材料的场发射特性[J]. 发光学报, 2010,31(4): 595-598

DONG Jian-hui, SHAN Yun. Field Emission Property of Carbon Nanotubes/Diamond Composite[J]. 发光学报, 2010,31(4): 595-598
董建会, 单云. 碳纳米管/金刚石复合材料的场发射特性[J]. 发光学报, 2010,31(4): 595-598 DOI：

DONG Jian-hui, SHAN Yun. Field Emission Property of Carbon Nanotubes/Diamond Composite[J]. 发光学报, 2010,31(4): 595-598 DOI：

摘要

采用微波烧结方法制备了碳纳米管/金刚石复合材料。将碳纳米管和纳米金刚石粉末混合后研磨压片

然后在微波等离子气相沉积系统中采用微波烧结。利用扫描电镜对复合材料的表面形貌和微观结构进行了分析

结果显示碳纳米管比较均匀地分散于复合材料中

并在表面形成了发射微尖。利用二极管结构在动态真空室中对复合材料的场发射特性进行了研究

复合材料有较好的场发射特性

电流密度接近15 mA/cm

。

Abstract

In order to achieve good stability of field emission as well as high current density

various carbon nanotube-based composites were developed. Here

carbon nanotubes/diamond composites were prepared by microwave sintering method. The carbon nanotubes were dispersed through the composite by thoroughly grin-ding the mixtures. Then

the mixtures were pressed into sheets and sintered by microwave in a microwave plasma chemical vapor deposition system. Morphologies and structural characteristics of composites were cha-racteriozed by scanning electron microscopy. The analytic results demonstrated that the carbon nanotubes are uniformly embedded in composite and formed emission tip. The field emission properties of carbon nanotubes/diamond composite cathodes were also measured in a high vacuum chamber at room temperature using a typical planar diode configuration. The measurement of field emission properties were carried out in a diode structure

wherein the sample acted as the cathode and a stainless-steel cylinder with a diameter of 2.1 mm served as the anode. The distance between the cathode and anode was maintained at 300 m. The measurement results showed that the field emission of carbon nanotubes/diamond composite is enhanced and the high current density is obtained. A high emission current density value of about 15 V/cm

is obtained. The results revealed that microwave sintering process is an effective and simple method to synthesize carbon nanotubes/diamond composite.

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Keywords

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