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Dielectric Al/CuO composite film energetic electric ignition bridge and ignition bridge array

A composite film and electric ignition technology, applied in the field of ignition arrays, can solve the problems of low energy conversion rate, achieve the effects of improving compatibility, improving ignition ability, and improving safety

Inactive Publication Date: 2011-11-30
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The thin-film bridge can be manufactured by MEMS technology, and it is easy to realize the integrated production with other parts of the pyrotechnic device. However, similar to the bridge wire electric pyrotechnic product and SCB, it only relies on electric energy to heat the bridge film, and the energy conversion rate is low.

Method used

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  • Dielectric Al/CuO composite film energetic electric ignition bridge and ignition bridge array
  • Dielectric Al/CuO composite film energetic electric ignition bridge and ignition bridge array
  • Dielectric Al/CuO composite film energetic electric ignition bridge and ignition bridge array

Examples

Experimental program
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Effect test

Embodiment 1

[0026] Dielectric Al / CuO Composite Thin Film Energetic Ignition Bridge Based on Cr Metal Film Heating

[0027] Using the 2μm Cr metal film as the upper and lower electrodes, and the Al / CuO composite film with 6 modulation periods (thickness 7.2μm) as the dielectric layer, the ignition bridge was fabricated by the above microfabrication process. The size of the upper and lower electrode layers of the ignition bridge is: 1000 μm × 1000 μm × 2 μm, and the Al / CuO composite thin film dielectric layer is: 1000 μm × 1000 μm × 7.2 μm. The electrical breakdown of the dielectric layer can be realized by using a 40V DC constant voltage, the obtained ignition delay time is 0.7ms, and the consumed electric energy is 381mJ. The chemical reaction heat released by the Al / CuO composite film is 101.34mJ, so the total heat of reaction is 484.34mJ, and the chemical reaction heat accounts for 21% of the total released energy. Through the ignition temperature test of the ignition bridge, it can be...

Embodiment 2

[0029] Dielectric Al / CuO Composite Thin Film Energetic Ignition Bridge Based on Ti Metal Film Heating

[0030]Using the 2 μm Ti metal film as the upper and lower electrodes, and the Al / CuO composite film with 6 modulation periods (thickness 7.2 μm) as the dielectric layer, the ignition bridge was fabricated by the above-mentioned microfabrication process. The size of the upper and lower electrode layers of the ignition bridge is: 1000 μm × 1000 μm × 2 μm, and the Al / CuO composite thin film dielectric layer is: 1000 μm × 1000 μm × 7.2 μm. The electrical breakdown of the dielectric layer can be achieved by using a 40V DC constant voltage, the obtained ignition delay time is 1.2ms, and the consumed electric energy is 432mJ. The chemical reaction heat released by the Al / CuO composite film is 101.34mJ, so the total heat of reaction is 533.34mJ, and the chemical reaction heat accounts for 19% of the total released energy. Through the ignition temperature test of the ignition bridge...

Embodiment 3

[0032] Dielectric Al / CuO Composite Thin Film Energetic Ignition Bridge Based on Cu Metal Film Heating

[0033] Using 2 μm Cu metal film as the upper and lower electrodes, Al / CuO composite film with 6 modulation periods (thickness 7.2 μm) as the dielectric layer, the ignition bridge was fabricated by the above microfabrication process. The size of the upper and lower electrode layers of the ignition bridge is: 1000 μm × 1000 μm × 2 μm, and the Al / CuO composite thin film dielectric layer is: 1000 μm × 1000 μm × 7.2 μm. The electrical breakdown of the dielectric layer can be realized by using a 40V DC constant voltage, the obtained ignition delay time is 0.5ms, and the consumed electric energy is 212mJ. The chemical reaction heat released by the Al / CuO composite film is 101.34mJ, so the total heat of reaction is 313.34mJ, and the chemical reaction heat accounts for 32% of the total released energy. Through the ignition temperature test of the ignition bridge, it can be seen that...

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Abstract

The invention discloses a dielectric Al / CuO composite film energetic electric ignition bridge and an ignition bridge array. The bridge body of the ignition bridge is formed by overlapping an upper electrode, a lower electrode and a dielectric layer; two layers of metal films with the same size and different directions serve as the upper electrode and the lower electrode; an Al / CuO composite film layer with the same size and direction as the upper electrode metal film is sandwiched between the two layers of metal films to serve as the dielectric layer; partial Al / CuO composite film layer is coated and overlapped on the lower electrode metal film; and the upper electrode metal film is completely coated and overlapped on the Al / CuO composite film layer. In the ignition array taking the dielectric Al / CuO composite film energetic electric ignition bridge as a basic unit, a plurality of dielectric Al / CuO composite film energetic electric ignition bridges are connected through leads preparedfrom Au metal films or Cu metal films to form the ignition array. The invention has the advantages of high safety, high ignition capacity and good compatibility.

Description

technical field [0001] The invention belongs to the field of basic components of electrical explosive products, in particular to a dielectric Al / CuO composite thin film containing energetic ignition bridge and an ignition array based on the ignition bridge. Background technique [0002] Electric pyrotechnics are one of the initial energy sources commonly used for the combustion and explosion of energetic materials. They are widely used in the fields of weaponry and national economy, such as mine blasting, safety protection airbags, micro satellite propulsion systems, rocket engine ignition systems, combat The internal fire and explosion sequence, missile trajectory correction and safety devices, etc. [0003] Bridge wire EED is the most widely used EED. It relies on the current passing through a fine metal bridge wire with a certain resistance, and the electric energy is according to the Joule-Lenz law Heat is generated, which heats up the bridge wire to a scorching hot s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C06C5/00
Inventor 朱朋沈瑞琪叶迎华胡艳吴立志周翔
Owner NANJING UNIV OF SCI & TECH
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