Powder material low temperature plasma surface treatment method and its apparatus

A technology of low-temperature plasma and powder materials, applied in chemical instruments and methods, chemical/physical processes, chemical/physical/physicochemical processes of energy application, etc., can solve the problem of low processing efficiency, poor processing uniformity, inaccessibility To achieve high processing efficiency, simple loading and unloading, and good processing effect

Active Publication Date: 2012-10-24
SUZHOU OPS PLASMA TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Due to the special properties of powder materials, when it is subjected to plasma surface treatment, due to the agglomeration and accumulation between particles, the surface that is not exposed to the plasma atmosphere cannot be treated, so it is difficult to realize the surface treatment of individual particles. The surface is completely treated, resulting in poor treatment uniformity, low treatment efficiency, and poor treatment effect

Method used

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  • Powder material low temperature plasma surface treatment method and its apparatus

Examples

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Effect test

Embodiment 1

[0025] Example 1: Low-temperature plasma modification treatment on the surface of alumina powder

[0026] Weigh 200 grams of alumina powder (with a fineness of 20um), put it into the fluidized bed 3, and seal the fluidized bed 3. Vacuumize the fluidized bed 3 to 5 Pa, feed oxygen quantitatively at the bottom of the fluidized bed to keep the alumina powder in a fluidized state, and maintain the vacuum in the fluidized bed 3 at 100 Pa. Turn on the high-frequency power supply, apply a high-frequency electric field to the fluidized bed 3, form plasma in the fluidized bed 3, maintain a discharge power of 100W, and stop vacuuming and gas feeding after 10 minutes of treatment time. Fill the fluidized bed 3 with pure air to make the internal and external pressures of the fluidized bed 3 equal. At this time, open the outlet of the fluidized bed 3, take out the processed materials, and the treatment is over.

Embodiment 2

[0027] Example 2: Low-temperature plasma modification treatment on the surface of silica powder

[0028] Weigh 200 grams of silicon dioxide powder (fineness is 10um), put it into the fluidized bed 3, and seal the fluidized bed 3. Vacuumize the fluidized bed 3 to 5 Pa, feed oxygen quantitatively at the bottom of the fluidized bed 3, make the silica powder in a fluidized state, and maintain the vacuum degree in the fluidized bed 3 at 100 Pa. Turn on the high-frequency power supply, apply a high-frequency electric field to the fluidized bed 3, form plasma in the fluidized bed 3, maintain a discharge power of 100W, and stop vacuuming and gas feeding after 10 minutes of treatment time. Fill the fluidized bed 3 with pure air to make the pressure inside and outside the fluidized bed 3 equal. At this time, open the outlet of the fluidized bed 3 to take out the processed materials, and the treatment is over.

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Abstract

The invention provides a powder material low temperature plasma surface treatment method, which comprises the following steps: filling the powder material in a fluidized bed for surface treatment, performing vacuum-pumping in the fluidized bed, the reaction gas is introduced with quantification at the bottom of the fluidized bed, and the glow discharge plasma is generated in the fluidized bed by applying an electric field. A surface treatment apparatus comprises an electrode, the fluidized bed, a flow regulator, a gas cylinder, a plasma power supply generator, a particle filtering trap and a vacuum pump. According to the invention, treatment is carried out on the surface exposed in the plasma atmosphere, full treatment on the separated particulate surface can be realized, the treatment uniformity is good, the treatment efficiency is high and the treatment effect is ideal.

Description

technical field [0001] The invention relates to a low-temperature plasma surface treatment method and device for powder materials. Background technique [0002] Material surface modification technology is one of the commonly used material preparation technologies at present. Its basic principle is that under certain external conditions, the external substances of the material and the surface of the material undergo physical or chemical reactions, so that the state of the material surface changes or the surface of the material changes. Produce new elements and new groups, and finally meet the needs of practical applications. At present, the method of material surface treatment is usually the liquid phase reaction method. Because the liquid phase reaction method has the disadvantages of high energy consumption and pollution to the environment, an energy-saving and environmentally friendly method is urgently needed to replace it. [0003] Low-temperature plasma surface treatme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J8/24B01J19/08
Inventor 王红卫
Owner SUZHOU OPS PLASMA TECH
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