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Boron powder compound with high combustion performance and preparation method thereof

A combustion performance and composite technology, applied in the direction of nuclear power generation, climate sustainability, explosives, etc., can solve the problems of boron powder energy density loss, difficult to adjust the thickness of the cladding layer, poor integrity, uniformity, etc., to achieve energy The effects of improved release efficiency, easy implementation and promotion, and high quality and reliability

Active Publication Date: 2022-07-12
XIAN MODERN CHEM RES INST
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  • Claims
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Problems solved by technology

[0004] Although the iron oxide coated by the above method can have a certain effect on the ignition and combustion performance of boron particles, this kind of method lacks precise control over the process, and the complete Poor stability and uniformity, the thickness of the coating layer is difficult to adjust accurately, and it is easy to cause the loss of the energy density of boron powder; at the same time, the post-processing of this method is troublesome, requiring a lot of manual operations, and there are great safety hazards

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  • Boron powder compound with high combustion performance and preparation method thereof
  • Boron powder compound with high combustion performance and preparation method thereof
  • Boron powder compound with high combustion performance and preparation method thereof

Examples

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Embodiment 1

[0051] This embodiment provides a boron powder composite with high combustion performance and a preparation method thereof. The intermediate transition layer is zinc oxide, and the two precursors used in the synthesis of the intermediate transition layer zinc oxide by ALD are diethyl zinc and water, respectively. The two precursors used in the synthesis of iron oxide films by ALD are ferrocene and oxygen, respectively, and the type of reaction chamber of the atomic layer deposition system used is a fixed bed type. The method specifically includes the following steps:

[0052] Step 1. With boron particles as the inner core, the boron particles are placed in the reaction chamber of the atomic layer deposition system, and the pressure in the reaction chamber is controlled to be negative pressure, 200Pa, and the temperature is 130°C;

[0053] Step 2, using zinc oxide as the intermediate transition layer, performing several atomic layer deposition cycles on the surface of the boron ...

Embodiment 2

[0070] This embodiment provides a boron powder composite with high combustion performance and a preparation method thereof. This method is the same as Example 1, the only difference is that in this example, steps 2.1 to 2.4 are cycled 50 times to finally obtain a composite boron fuel coated with a zinc oxide transition layer that is cycled 50 times and an iron oxide film that is cycled 200 times. i.e. B@50cyZnO@200cyFe 2 O 3 .

[0071] figure 2 The DSC test results show that, compared with the uncoated modified boron fuel, after 50 cycles of the zinc oxide transition layer and 200 cycles of the iron oxide film ALD-coated modified boron powder composite, at 522 °C and 595 °C An obvious exothermic shoulder peak of the reaction between boron and zinc oxide was found at 626 °C, an obvious exothermic shoulder peak of the aluminothermic reaction of boron and iron oxide films was found at 626 °C, and an exothermic shoulder peak of the rapid reaction between boron and oxygen was f...

Embodiment 3

[0073] This embodiment provides a boron powder composite with high combustion performance and a preparation method thereof. This method is the same as Example 1, the only difference is that: the type of reaction chamber of the atomic layer deposition system used in this example is a rotating bed type, the intermediate transition layer used is titanium oxide, and the first precursor is tetraisopropanol Titanium, the second precursor is hydrogen peroxide;

[0074] The temperature in step 1 is 150°C, and the time sequence in step 2 is 60s from t1 to t4; steps 2.1 to 2.4 are cycled 20 times; steps 3.1 to 3.4 are cycled 250 times, and finally a transition layer coated with 20-cycle titanium oxide is obtained and the composite boron fuel with 250 cycles of iron oxide films, namely B@20cyTiO 2 @250cyFe 2 O 3 .

[0075] Figure 5 The DSC test results show that, compared with the uncoated modified boron fuel, after 20 cycles of titanium oxide transition layer and 250 cycles of iro...

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Abstract

The invention discloses a boron powder compound with high combustion performance and a preparation method of the boron powder compound. The boron powder compound is characterized in that a boron particle is used as an inner core, a nano metal oxide is used as an intermediate transition layer to coat the surface of the boron particle, and a nano iron oxide film is used as a surface layer to coat the surface of the nano metal oxide; the nano metal oxide is one or more of aluminum oxide, zinc oxide, titanium oxide and magnesium oxide. The nano iron oxide film and the intermediate transition layer metal oxide film uniformly coat the surface of the boron powder, and the precise control of the components and content of the oxide can be realized by regulating and controlling the atomic layer deposition cycle index. Based on the synergistic catalysis effect of the bimetallic oxide, through atomic layer deposition of the boron powder compound coated with the metal oxide and the iron oxide, the reaction temperature of the iron oxide and the boron powder is advanced by about 180 DEG C compared with the reaction temperature of the boron powder and oxygen, and the energy release efficiency is remarkably improved.

Description

technical field [0001] The invention relates to the technical field of explosive high-energy solid fuel, in particular to a boron powder compound with high combustion performance and a preparation method thereof. Background technique [0002] Boron powder has high mass calorific value and volume calorific value. Its mass calorific value is as high as 59KJ / g, which is 2.3 times that of magnesium and 1.9 times that of aluminum; its volume calorific value is as high as 137KJ / cm 3 , which is 3.09 times that of magnesium, 1.66 times that of aluminum, and 3 times that of hydrocarbons. Therefore, boron is actually the best high-energy fuel in terms of energy characteristics, especially in weight and volume constrained weapon systems, where it is the preferred high-energy solid fuel over magnesium and aluminum powders. Although boron powder has a high mass and volume calorific value, in practical applications, the B on the surface of boron 2 O 3 It is easy to interact with the wa...

Claims

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Application Information

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IPC IPC(8): C06B45/30C06B33/00B82Y30/00B82Y40/00
CPCC06B45/30C06B33/00B82Y30/00B82Y40/00Y02E30/30
Inventor 秦利军冯昊胡逸云李丹龚婷李建国惠龙飞张王乐
Owner XIAN MODERN CHEM RES INST
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