A kind of preparation method of β-phase RDX gold
A RDX and substrate technology, applied in the field of energetic materials, can solve few problems such as sublimation and recrystallization, and achieve the effect of simple and easy operation
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[0028] The invention provides a method for preparing β-phase RDX, characterized in that it comprises:
[0029] A) Place RDX under the substrate, heat it to a temperature greater than or equal to the sublimation temperature of RD, keep it warm, and obtain β-phase RD on the substrate after cooling; the RD is α-phase black Sorkin or a mixture of α-phase RDX and β-phase RDX.
[0030] Among them, the present invention has no special limitation on the sources of all raw materials, which can be commercially available.
[0031] The raw material used in the present invention is RDXG, which is α-phase RDXOGIN or a mixture of α-phase RDXOGIN and β-phase RDXOGIN.
[0032] RDX is placed under the substrate; the substrate is preferably a quartz substrate, a silicon wafer substrate or a stainless steel substrate; in the present invention, preferably RDX is placed in the sample heating chamber, and the substrate is placed Above the sample heating chamber.
[0033] Then heated to a sublimat...
Embodiment 1
[0045] Example 1: Using a silicon wafer as a substrate
[0046] 1.1 figure 1 is the thermogravimetric spectrum of RXD particles, figure 2 is the weight evolution spectrum of RXD particles with time at 160°C; from figure 1 and figure 2 It can be concluded that the sublimation point of RDX particles is 160°C.
[0047] 1.2 Use a (111)-oriented silicon wafer as a substrate, place the substrate above the heating chamber, and place two RDX particles in the heating chamber.
[0048] 1.3 According to the heating rate of 20°C / min, heat the RDX particles to 190°C and hold for 5 minutes: adopt the sequential heating mode, follow the normal temperature—100°C for 5 minutes—heat to 120°C for 5 minutes—140°C for 5 minutes—160°C Keep warm for 5 minutes—190°C for 5 minutes. Cool down to room temperature naturally.
[0049] 1.4 Remove the substrate, and do a Raman spectrum test on the crystal on the substrate, such as image 3 ,Such as image 3 is the Raman spectrogram of the crystal ...
Embodiment 2
[0054] Example 2: Using Metal as a Substrate
[0055] 2.1 from figure 1 and figure 2 It can be concluded that the sublimation point of RDX crystal is 160°C.
[0056] 2.2 Use stainless steel as the substrate, place the substrate above the heating chamber, and put two RDX particles in the heating chamber.
[0057] 2.3 According to the heating rate of 20°C / min, heat the RDX particles to 190°C and keep it warm for 5 minutes. We adopted the mode of sequential heating, according to normal temperature—100°C for 5 minutes—120°C for 5 minutes—140°C for 5 minutes—160°C for 5 minutes—190°C for 5 minutes. Cool down to room temperature naturally.
[0058] 2.4 Remove the substrate, do Raman spectrum test on the crystal on the substrate, and adopt statistical method, take 100 data points to analyze that the proportion of β phase is 98%.
[0059] 2.5 Lower the temperature to 160 degrees centigrade, repeat (2) (3) (4), adopt statistical methods, adopt 100 data points to analyze that the ...
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