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Method for preparing nanoscale magnesium nitride powder

A nano-scale, nano-magnesium technology, applied in nanotechnology, nitrogen-metal/silicon/boron binary compounds, etc., can solve the problems of toxicity, unfavorable large-scale production, high price, and achieve the effect of high reactivity

Active Publication Date: 2012-06-13
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ai Yujie and others from Shandong Normal University prepared magnesium nitride powder with high purity by the direct reaction method of magnesium powder and ammonia gas, but ammonia gas is very soluble in water, so it is necessary to keep a good dry environment in the experiment, and ammonia gas is also Has dangerous properties such as corrosiveness and toxicity, and is also more expensive than nitrogen, which are not conducive to mass production

Method used

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  • Method for preparing nanoscale magnesium nitride powder
  • Method for preparing nanoscale magnesium nitride powder
  • Method for preparing nanoscale magnesium nitride powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 1. Put a pure magnesium block (length 60mm, width 30mm, height about 10mm) with a smooth surface as the anode, and a tungsten rod as the cathode, and place it in the DC arc plasma equipment; when the device is pumped to a vacuum of 5×10 -2 At Pa, fill in 0.7atm argon and 0.1atm hydrogen; turn on the cooling water system (water pressure 2Mpa) and start the arc, adjust the current to 120A, continue to pass hydrogen to keep the equipment pressure at 0.8-1atm, react for 10min, and extinguish the arc After cooling to room temperature, turn off the cooling water system; vacuum the DC arc plasma equipment to 0.01Mpa; then fill it with 60KPa argon, then fill it with 5KPa air every half hour, and then fill it with 40Kpa air for passivation of the powder ,, the passivation time is 12 hours; collect the inner wall powder, which is the prepared nano-magnesium powder;

[0023] 2. Weigh 2g of the above-mentioned nano-magnesium powder and spread it evenly on the bottom of the ceramic ...

Embodiment 2

[0027] 1. Put a pure magnesium block (length 60mm, width 30mm, height about 10mm) with a smooth surface as the anode, and a tungsten rod as the cathode, and place it in the DC arc plasma equipment; when the device is pumped to a vacuum of 5×10-2Pa , fill in 0.7atm argon and 0.1atm hydrogen; turn on the cooling water system (water pressure 2Mpa) and start the arc, adjust the current to 120A, continue to pass hydrogen and keep the equipment pressure at 0.8-1atm to react for 20min, extinguish the arc, and cool down to room temperature; evacuate the DC arc plasma equipment to 0.01MPa, and then fill it with argon gas of 0.7atm and air of 0.3atm for passivation operation; after passivation, collect the inner wall powder, which is the prepared nano-magnesium powder;

[0028] 2. Weigh 2g of the above-mentioned nano-magnesium powder and spread it evenly on the bottom of the ceramic boat; put the ceramic boat with the magnesium powder into the quartz tube, then put it into the tube furna...

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PUM

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Abstract

The invention discloses a method for preparing magnesium nitride powder. The method comprises the following steps of: adding nano magnesium powder into a quartz tube; and fully reacting the nano magnesium powder with high-purity nitrogen at the temperature of between 600 and 900 DEG C to prepare the nanoscale magnesium nitride powder. The preparation method is simple, the problem that magnesium is easily oxidized by air in the conventional preparation method is solved, and high-purity magnesium nitride powder is prepared.

Description

technical field [0001] The invention relates to a method for preparing magnesium nitride powder, in particular to a method for preparing nanoscale magnesium nitride powder. Background technique [0002] Magnesium Nitride (Mg 3 N 2 ) is an inorganic compound composed of nitrogen and magnesium. It is a yellow-green powder at room temperature. The density is 2712kg / m 3 , with a melting point of 800°C and a boiling point of 700°C, belonging to the cubic crystal system. [0003] Magnesium nitride is very easy to react with water to form magnesium hydroxide and release ammonia gas, which can absorb water vapor in the air and deteriorate, so magnesium nitride is generally stored in vacuum; magnesium nitride can occur with almost all acids Reaction: Magnesium nitride has good thermal stability, and it reacts with oxygen to form magnesium oxide only when it is above 800°C in the air. [0004] Magnesium nitride has a wide range of applications: magnesium nitride is an indispensa...

Claims

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Application Information

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IPC IPC(8): C01B21/06B82Y40/00
Inventor 邹建新郭皓曾小勤丁文江
Owner SHANGHAI JIAO TONG UNIV
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