a kind of mosi 2 ‑mo 5 the si 3 ‑sio 2 Preparation method of composite material
A composite material, mosi2-mo5si3-sio2 technology, applied in the direction of silicon dioxide, silicon oxide, metal silicide, etc., can solve the problems of harsh reaction conditions, high equipment requirements, complex technology, etc., to achieve high repeatability, high The effect of purity, simple process steps
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Embodiment 1
[0023] A kind of MoSi 2 -Mo 5 Si 3 -SiO 2 The preparation method of composite material, comprises the following steps:
[0024] 1) Add 1.171g of ammonium paramolybdate to 30mL of 0.1mol / L aqueous glucose solution, and stir until the ammonium paramolybdate is completely dissolved to obtain a mixed solution;
[0025] 2) Add 5 mL of industrial silica sol with a silica mass fraction of 20% (manufactured by: Shandong Baite New Material Technology Co., Ltd.) to the above mixed solution, and after magnetic stirring for 5 hours, conduct a hydrothermal reaction at 180°C for 24 hours , after the reaction is finished, the reaction solution is filtered to obtain a precipitate; during the hydrothermal reaction, the filling volume ratio of the hydrothermal kettle is 30%;
[0026] 3) After washing the precipitate, dry it in a vacuum oven at 80°C for 12 hours;
[0027] 4) Place the dried precipitate in a vacuum furnace, heat treatment at 1500°C for 3 hours under argon protection, cool an...
Embodiment 2
[0029] A kind of MoSi 2 -Mo 5 Si 3 -SiO 2 The preparation method of composite material, comprises the following steps:
[0030] 1) Add 0.89g of ammonium paramolybdate to 40mL of 0.2mol / L aqueous glucose solution, and fully stir until the ammonium paramolybdate is completely dissolved to obtain a mixed solution;
[0031] 2) Add 8 mL of industrial silica sol with a mass fraction of 20% to the above mixed solution, and after magnetically stirring for 3 hours, conduct a hydrothermal reaction at 160°C for 48 hours. After the reaction, filter the reaction solution to obtain a precipitate; The tank filling volume ratio is 40%;
[0032] 3) After washing the precipitate, dry it in a vacuum oven at 100°C for 8 hours;
[0033] 4) Place the dried precipitate in a vacuum furnace, heat treatment at 1600°C for 1.5h under the protection of argon, and finally obtain MoSi after cooling and grinding 2 -Mo 5 Si 3 -SiO 2 composite material.
Embodiment 3
[0035] A kind of MoSi 2 -Mo 5 Si 3 -SiO 2 The preparation method of composite material, comprises the following steps:
[0036] 1) Add 1.2 g of ammonium paramolybdate to 33 mL of 0.3 mol / L aqueous glucose solution, and stir until the ammonium paramolybdate is completely dissolved to obtain a mixed solution;
[0037] 2) Add 3 mL of industrial silica sol with a mass fraction of 40% to the above mixed solution, and after magnetically stirring for 8 hours, conduct a hydrothermal reaction at 200°C for 12 hours. After the reaction, filter the reaction solution to obtain a precipitate; The tank filling volume ratio is 50%;
[0038] 3) After washing the precipitate, dry it in a vacuum oven at 80°C for 6 hours;
[0039] 4) Place the dried precipitate in a vacuum furnace, heat treatment at 1400°C for 5 hours under the protection of argon, and finally obtain MoSi after cooling and grinding 2 -Mo 5 Si 3 -SiO 2 composite material.
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