Nano silicon-based material, and preparation method and application thereof
A nano-silicon, base material technology, applied in electrical components, battery electrodes, circuits, etc., to achieve the effects of low cost, short cycle, and reduced contact
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[0041] Example 1
[0042] A method for preparing nano silicon-based materials includes the following steps:
[0043] 1) First, the commercial crude silicon and sulfur powder are mixed uniformly at a molar ratio of 1:2.05, sealed in a quartz tube under an argon atmosphere, and then the quartz tube is placed in a tube furnace and heated to a temperature of 5°C / min. 1100°C and keep it at this temperature for 10 hours to obtain silicon sulfide;
[0044] 2) Then the silicon sulfide prepared in step 1) is mixed with magnesium powder and sodium chloride by ball milling at a speed of 180r / min, and the ball milling time is 10 hours to obtain a mixture; the molar ratio of the magnesium powder to silicon sulfide is 2: 1. The weight ratio of sodium chloride to silicon sulfide is 7:1.
[0045] 3) Put the mixture described in step 2) in a tube furnace, and pass argon gas to carry out the magnesium thermal reduction reaction. The reaction temperature is 800°C and the reaction time is 10 hours; afte...
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[0059] Example 2
[0060] A method for preparing nano silicon-based materials includes the following steps:
[0061] 1) First, the commercial crude silicon and sulfur powder are mixed uniformly at a molar ratio of 1:2.05, sealed in a quartz tube under an argon atmosphere, and then the quartz tube is placed in a tube furnace and heated to a temperature of 5°C / min. 1100°C, keep it at this temperature for 10 hours, and cool to room temperature to obtain silicon sulfide;
[0062] 2) Then the silicon sulfide prepared in step 1) is mixed with aluminum powder and sodium chloride by ball milling at a speed of 180r / min and the milling time is 10 hours to obtain a mixture; the molar ratio of aluminum powder to silicon sulfide is 4.0:3, The weight ratio of sodium chloride to silicon sulfide is 6:1.
[0063] 3) Put the mixture described in step 2) in a tube furnace, and argon gas to carry out the thermite reduction reaction. The reaction temperature is 750°C and the reaction time is 15 hours; af...
Example Embodiment
[0069] Example 3
[0070] A method for preparing nano silicon-based materials includes the following steps:
[0071] 1) First, the commercial crude silicon and sulfur powder are mixed uniformly at a molar ratio of 1:2.05, sealed in a quartz tube under an argon atmosphere, and then the quartz tube is placed in a tube furnace and heated to a temperature of 5°C / min. 1100°C, keep it at this temperature for 10 hours, and cool to room temperature to obtain silicon sulfide;
[0072] 2) Then the silicon sulfide prepared in step 1) is mixed with magnesium powder and potassium chloride by ball milling at a speed of 180r / min, and the milling time is 10 hours to obtain a mixture; the molar ratio of magnesium powder to silicon sulfide is 2.2:3, The weight ratio of potassium chloride to silicon sulfide is 9:1.
[0073] 3) Put the mixture described in step 2) in a tube furnace, and pass argon gas to carry out the magnesium thermal reduction reaction. The reaction temperature is 850°C and the reacti...
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