Solid material with optical slicing characteristic and preparation method thereof

An optical limiting, solid-state technology, applied in the field of functional composite materials, can solve problems such as few research reports, and achieve the effect of high permeability

Inactive Publication Date: 2008-09-10
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Incorporating carbon nanotubes into a glass matrix to prepare solid materi

Method used

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  • Solid material with optical slicing characteristic and preparation method thereof
  • Solid material with optical slicing characteristic and preparation method thereof
  • Solid material with optical slicing characteristic and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A 0.02wt% carbon nanotube / quartz glass composite was prepared by direct ball milling.

[0039] Carbon nanotubes are multi-walled carbon nanotubes (transmission electron micrographs of CNTs as shown in figure 2 shown).

[0040] 10 mg of carbon nanotubes, 0.1 g of cetyltrimethylammonium bromide (CTAB) and 60 ml of absolute ethanol were mixed and stirred for 5 minutes, and ultrasonically dispersed for 30 minutes to obtain a suspension of carbon nanotubes. The above carbon nanotube suspension, 50g silicon dioxide (SiO 2 ) powder and 150g agate balls were added into a 600mL ball mill jar, and the mixture was obtained after ball milling for 24h. Then the mixture was dried at 100°C for 5 h, and after passing through a 200-mesh sieve, a CNTs / SiO with a CNTs content of 0.02 wt% was obtained. 2 Powder. Finally, the prepared CNTs / SiO 2 Powder is added in graphite mould, under the pressure of 30Mpa and pure nitrogen (N 2 ) under a protective atmosphere, hot pressing and sint...

Embodiment 2

[0043] The 0.06wt% carbon nanotube / quartz glass composite was prepared by sol-gel method.

[0044] 30 mg of carbon nanotubes, 0.3 g of sodium dodecyl sulfate (SDS) and 80 mL of deionized water were mixed and stirred, and ultrasonically dispersed for 40 minutes to obtain a suspension of carbon nanotubes. At the same time, 216 mL of tetraethyl orthosilicate (TEOS), 250 mL of absolute ethanol and 200 mL of deionized water were mixed, stirred for 5 minutes, and then ultrasonicated at 40° C. for 30 minutes to hydrolyze the tetraethyl orthosilicate. Then, the suspension of carbon nanotubes was poured into the hydrolyzed tetraethyl orthosilicate, and while stirring magnetically, ammonia water with a concentration of 2.6M was added drop by drop until it gelled. The gel was washed 3 to 4 times with deionized water and 1 to 2 times with absolute ethanol, dried in an oven at 100°C for 12 hours, and then calcined in a muffle furnace at 500°C for 2 hours to obtain CNTs / SiO 2 Composite pow...

Embodiment 3

[0047] A 0.15wt% carbon nanotube / phosphate glass composite was prepared by direct ball milling.

[0048] 150 mg of carbon nanotubes, 0.6 g of dimethylformamide (DMF) and 120 ml of absolute ethanol were mixed and stirred for 5 minutes, and ultrasonically dispersed for 30 minutes to obtain a suspension of carbon nanotubes. The above carbon nanotube suspension, 30g B 2 o 3 , 20gCaO and 50g P 2 o 5 The mixture was obtained after ball milling for 30 h. Then the mixture was heated to 200 °C in a muffle furnace at a heating rate of 2 °C / min and kept for 4 h. After cooling, grind and pass through a 200-mesh sieve to obtain a carbon nanotube / phosphate glass powder with a carbon nanotube content of 0.15 wt%. Add the composite powder prepared in the graphite mould, under the pressure of 30Mpa and pure nitrogen (N 2 ) under a protective atmosphere, hot pressing and sintering at 1000° C. for 60 minutes to obtain a carbon nanotube / quartz glass composite material.

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Abstract

The invention provides carbon nano tube/glass composite material with light amplitude-limiting characteristic and a preparation method thereof, belonging to the functional composite material field. The invention aims to develop portable novel solid-state non-linear light amplitude-limiting material so as to overcome the limitation of the prior laser protective material. The invention is mainly characterized in that: a carbon nano tube is added in transparent glass matrix; through making use of the characteristic that the carbon nano tube can be used as the fine reinforcing body of composite material as well as the outstanding light amplitude-limiting performance of the carbon nano tube, the invention not only improves the mechanical property of the glass matrix, but also obtains excellent light amplitude-limiting performance; thus, the non-linear light amplitude-limiting material which can resist high temperature and environmental changes is made. The solid-state material provided by the method has light amplitude-limiting performance and high transmittance of visible light, thereby having greater application potential in laser protection; meanwhile, the solid-state material has the characteristics of simple process and low production cost, etc.

Description

technical field [0001] The invention relates to a solid-state material with optical limiting characteristics and a preparation method, and belongs to the technical field of functional composite materials. Background technique [0002] Since carbon nanotubes were discovered by S.Iijima of Japan's NEC Corporation in 1991 (S.Iijima, Nature, 354 (1991) 56), because of their unique mechanical properties, electrical properties and optical properties (L.Liao, S.Li , ApplPhys Lett, 79(2001) 4225), has always been a hot spot of scientific research in the world. In recent years, scientists have discovered that carbon nanotubes have broadband optical limiting characteristics for lasers, which indicates that they have good application prospects in laser protection. L.Vivien et al. studied the optical limiting behavior of single-walled carbon nanotubes (SWNTs) in water / surfactant to form a suspension, and found that SWNTs exhibit optical limiting properties in the visible and near-infra...

Claims

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Application Information

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IPC IPC(8): C03C14/00C03C4/00
Inventor 徐恒潘裕柏朱勇向长淑寇华敏郭景坤
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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