CN1159216C - Process for preparing carbon nano-tube film on stainless steel substrate - Google Patents
Process for preparing carbon nano-tube film on stainless steel substrate Download PDFInfo
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- CN1159216C CN1159216C CNB021150958A CN02115095A CN1159216C CN 1159216 C CN1159216 C CN 1159216C CN B021150958 A CNB021150958 A CN B021150958A CN 02115095 A CN02115095 A CN 02115095A CN 1159216 C CN1159216 C CN 1159216C
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Abstract
The present invention discloses a process for preparing a carbon nano-tube film on a stainless steel substrate, which comprises the following steps: (1), cleaning the stainless steel substrate to remove oil stains on the stainless steel substrate; (2), putting the cleaned stainless steel substrate into a high-temperature furnace, and warming up after inert gas is communicated as shield gas; (3), when temperature is up to 600 DEG C, stopping communicating the inert gas to communicate hydrogen gas; (4), after constant temperature is 60 to 240 minutes, stopping communicating the hydrogen gas to communicate the inert gas, continuously warming up to 700 DEG C, and then, communicating acetylene gas to react 5 to 10 minutes in constant temperature; (5), stopping communicating acetylene, and cooling down to room temperature under the protection of the inert gas. The process for preparing a carbon nano-tube film on a stainless steel substrate of the present invention is simple without any catalyst. Carbon nano-tubes prepared by the process can be used as cold cathode materials for electron sources, electric light sources, element tubes, etc.
Description
Technical field
The present invention relates to a kind of method for preparing carbon nano-tube film at the bottom of the stainless steel lining.
Background technology
The preparation method of carbon nanotube has arc-over, pulsed laser deposition (PLD), chemical vapor deposition (CVD) etc.Wherein CVD also comprises Thermal CVD, plasma CVD etc.In these preparation methods, need usually to adopt iron, metals such as nickel or cobalt are as catalyzer.Being reported in above-mentioned catalyst metal is the substrate preparation carbon nano-tube film.But also nobody does not use catalyzer successfully to prepare carbon nano-tube film at the bottom of the stainless steel lining at present.Because stainless material is processed easily, is a kind of material the most frequently used in the electron tube, so there is a kind of easy method can realize the growth of carbon nano-tube film on its surface, the application in the cold cathode display device has important meaning for carbon nanotube.
Summary of the invention
The invention provides a kind of any catalyzer that do not use, prepare the method for carbon nano-tube film at the bottom of the stainless steel lining.
The method for preparing carbon nano-tube film at the bottom of the stainless steel lining of the present invention may further comprise the steps:
(1) cleans at the bottom of the stainless steel lining greasy dirt on removing at the bottom of the stainless steel lining;
(2) the cleaned stainless steel substrate is put into High Temperature Furnaces Heating Apparatus, feed rare gas element and heat up after as shielding gas;
(3) when temperature reaches 600 degrees centigrade, stop to feed rare gas element, feed hydrogen, constant temperature 60 to 240 minutes;
(4) stop to feed hydrogen, feed rare gas element, continue to be warming up to 700 degrees centigrade, fed the acetylene gas isothermal reaction then 5 to 10 minutes;
(5) stop to feed acetylene, drop to room temperature in the protection of rare gas element.
The method for preparing carbon nano-tube film at the bottom of the stainless steel lining of the present invention is simple, need not any catalyzer, and the carbon nanotube of preparing can be used for electron source, and electric light source and pixel pipe etc. are as cold-cathode material.
Description of drawings
Fig. 1 is the SEM photo of the carbon nano-tube film for preparing at the bottom of the stainless steel lining;
Fig. 2 is the TEM photo of the carbon nano-tube film for preparing at the bottom of the stainless steel lining;
Fig. 3 is emission location, the field distribution plan of the carbon nano-tube film for preparing at the bottom of the stainless steel lining;
Fig. 4 schemes for field emission-voltage response of the carbon nano-tube film for preparing at the bottom of the stainless steel lining and corresponding FN.
Embodiment
Adopt No. 304 stainless steels (Fe: Cr: Ni=70: 19: 11) as substrate.Used at first respectively at the bottom of acetone and the ethanol ultrasonic cleaning stainless steel lining 15 minutes.To put into High Temperature Furnaces Heating Apparatus at the bottom of the stainless steel lining, feed argon gas, be warming up to 600 degrees centigrade, close argon gas, feed hydrogen, constant temperature reduction reaction 180 minutes.Close hydrogen, feed argon gas, continue to be warming up to 700 degrees centigrade, feed the acetylene gas reaction, the throughput ratio of acetylene and argon gas is 1: 10, constant temperature 5 minutes.Close acetylene, feed argon gas.Under argon gas atmosphere, be cooled to room temperature, close argon gas, take out sample.
With the carbon nano-tube film of method for preparing, observe with scanning electronic microscope (SEM) and transmission electron microscope (TEM), the result is as depicted in figs. 1 and 2.As seen from the figure, the carbon nanotube of preparation is many wall constructions, and diameter range is in 25 to 50 nanometers, 5 microns to 10 microns of length.Use emission comprehensive tester has been analyzed its field emission characteristic.Fig. 3 for the circular stainless steel lining of transparent anode record at the bottom of on the distribution situation of emission location.Can see that electronics comes out from whole surface emitting more equably.Electric current-strength of electric field the rational curve of measurement gained has also provided corresponding FN curve as shown in Figure 4 among the figure.
Can reach a conclusion from The above results, the carbon nano-tube film of preparation has field emission characteristic preferably, and promptly transmitter current is big, and threshold field is little, can be applied to electron source fully, electric light source and pixel pipe etc.
Claims (3)
1. method for preparing carbon nano-tube film at the bottom of the stainless steel lining, it is characterized in that: it may further comprise the steps:
(1) cleans at the bottom of the stainless steel lining greasy dirt on removing at the bottom of the stainless steel lining;
(2) the cleaned stainless steel substrate is put into High Temperature Furnaces Heating Apparatus, feed rare gas element and heat up after as shielding gas;
(3) when temperature reaches 600 degrees centigrade, stop to feed rare gas element, feed hydrogen, constant temperature 180 minutes;
(4) stop to feed hydrogen, feed rare gas element, continue to be warming up to 700 degrees centigrade, fed the acetylene gas isothermal reaction then 5 to 10 minutes;
(5) stop to feed acetylene, drop to room temperature in the protection of rare gas element.
2. by the described method for preparing carbon nano-tube film at the bottom of the stainless steel lining of claim 1, it is characterized in that: employed rare gas element is an argon gas.
3. by the described method for preparing carbon nano-tube film at the bottom of the stainless steel lining of claim 1, it is characterized in that: the acetylene gas of feeding and the throughput ratio of argon gas are 1: 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021150958A CN1159216C (en) | 2002-04-17 | 2002-04-17 | Process for preparing carbon nano-tube film on stainless steel substrate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021150958A CN1159216C (en) | 2002-04-17 | 2002-04-17 | Process for preparing carbon nano-tube film on stainless steel substrate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1386701A CN1386701A (en) | 2002-12-25 |
| CN1159216C true CN1159216C (en) | 2004-07-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB021150958A Expired - Lifetime CN1159216C (en) | 2002-04-17 | 2002-04-17 | Process for preparing carbon nano-tube film on stainless steel substrate |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101400198B (en) * | 2007-09-28 | 2010-09-29 | 北京富纳特创新科技有限公司 | Surface heating light source, preparation thereof and method for heat object application |
| CN101409961B (en) * | 2007-10-10 | 2010-06-16 | 清华大学 | Surface heat light source, preparation method thereof and method for heating object using the same |
| CN102945950B (en) * | 2012-11-26 | 2015-03-25 | 中国科学院上海硅酸盐研究所 | Method for in-situ growth of carbon nanotube array on metal current collector |
| CN103811240B (en) * | 2013-12-24 | 2017-01-25 | 兰州空间技术物理研究所 | Carbon nano-tube cathode preparation method |
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2002
- 2002-04-17 CN CNB021150958A patent/CN1159216C/en not_active Expired - Lifetime
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| Publication number | Publication date |
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| CN1386701A (en) | 2002-12-25 |
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