Preparation method of Al/NiO flaky aluminothermic agent
A kind of thermite and sheet-like technology, which is applied in the field of preparation of composite films of nano energetic materials, can solve the problems of mass transfer rate of thermite reaction, environmental friendliness of process design, convenience of use and unsatisfactory industrial production, aluminum The problems of slow reaction rate and high ignition temperature on the hot surface achieve the effect of low preparation cost, excellent heat release performance and combustion performance, and uniform surface distribution
Active Publication Date: 2019-04-26
CHONGQING UNIV
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Problems solved by technology
[0002] The traditional thermite is just a simple mixture of aluminum powder and metal oxide, so the thermite surface reaction rate is slow, the ignition temperature is high, and the actual heat release is also very low, which is difficult to meet the high requirements of military and other special industries.
Although some existing laboratory thermite preparation methods have been improved in many aspects, they are still unsatisfactory in terms of mass transfer rate, process design, environmental friendliness, ease of use and industrial production of thermite reaction.
Method used
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Embodiment 1
[0043] PEG2000 was used for PEG; the hydrothermal reaction temperature was maintained at 160°C, the reaction time was 12h, and the pH was adjusted to 7; the calcination temperature was 350°C; the sputtering plating time was 0.2h.
[0044] Field emission scanning electron microscope (FESEM), differential scanning calorimeter (DSC), high-speed camera, etc. were used to analyze and characterize the surface morphology and performance of the composite film product. Fig. 2 (a) and Fig. 2 (b) are the scanning electron micrograph and the transmission electron micrograph of the Al / NiO flake thermite prepared according to embodiment 1 respectively; image 3 is the corresponding DSC heat release curve, the heat release is as high as 1.5MJ Kg -1 ; Figure 4 is the combustion flame diagram of the thermite.
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A preparation method of an Al / NiO flaky aluminothermic agent comprises the following steps: providing a flaky peelable metal substrate; preparing hydrothermal synthesis reaction liquid; performing a hydrothermal synthesis reaction to obtain a precursor on the substrate; calcinating the precursor to form an NiO flaky layer on the substrate; finally, forming a nanometer aluminum film on the NiO flaky layer through magnetron sputtering so as to obtain a flaky Al / NiO nanometer energetic composite film. The aluminothermic agent is convenient to store and carry, low in production cost, environmentally friendly and excellent in combustion heat release performance.
Description
technical field [0001] The invention relates to a preparation method of a composite thin film of a nano energy-containing material. Background technique [0002] The traditional thermite is just a simple mixture of aluminum powder and metal oxide, so the thermite surface reaction rate is slow, the ignition temperature is high, and the actual heat release is also very low, which is difficult to meet the high requirements of military and other special industries. Although some existing laboratory thermite preparation methods have been improved in many aspects, they are still unsatisfactory in terms of mass transfer rate, process design, environmental friendliness, ease of use and industrial production of thermite reaction. Contents of the invention [0003] The object of the present invention is to provide a thermite with better performance. [0004] According to a first aspect of the present invention, a method for preparing an Al / NiO flake thermite is provided, comprising...
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IPC IPC(8): C06B33/00C23C18/12C23C14/18C23C14/35
CPCC06B33/00C23C14/185C23C14/35C23C18/1216
Inventor 黎学明郭晓刚王琪辉王雅丽陶志徐鹏陈金杨晟博何苗
Owner CHONGQING UNIV
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