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Normal pressure zinc vapor oxidizing process for preparing four-needle zinc oxide whisker

A technology of four-needle zinc oxide and normal-pressure zinc, applied in zinc oxide/zinc hydroxide, chemical instruments and methods, crystal growth, etc., can solve problems such as multiple auxiliary equipment, improve product quality, wide source of raw materials, The effect of simplifying the production process

Inactive Publication Date: 2007-06-27
BEIJING GENERAL RES INST OF MINING & METALLURGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method requires more auxiliary equipment

Method used

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  • Normal pressure zinc vapor oxidizing process for preparing four-needle zinc oxide whisker

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Experimental program
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Effect test

Embodiment 1

[0028] Using metal zinc ingots as raw materials, the zinc evaporation furnace is an airtight heating furnace lined with silicon carbide material. 3kg metal zinc block is added into the furnace, covered and sealed, and the temperature of the zinc evaporation furnace is automatically controlled by the program temperature controller. control. By controlling the heating temperature of the zinc evaporation furnace, zinc vapors of different pressures can be obtained. The zinc vapor generated by the zinc evaporation furnace is introduced into a horizontal horizontal oxidation reaction electric furnace through alumina tubes or quartz tubes.

[0029] After the metal zinc is melted, the temperature of the zinc evaporation furnace is rapidly raised. When the temperature of the zinc evaporation furnace rises to the set temperature, control the reaction temperature at about 650-1300°C; maintain the temperature in the oxidation reaction electric furnace, accurately control the amount of air...

Embodiment 2

[0032] Zinc particles are used as raw materials, put into the zinc evaporation furnace, and isolated from the outside atmosphere. Raise the temperature of the zinc evaporation furnace, and when the pressure of the zinc vapor reaches a certain level, introduce the zinc vapor into the reaction zone, and control the reaction temperature at about 650-1300°C. Open the air inlet and blow into zinc oxide powder with a particle size of 10 to 50 nanometers with air. The zinc vapor is continuously oxidized to generate white flocs, and about 230 grams of product are produced within 15 minutes. Confirmed by scanning electron microscope (SEM), the product is tetrapod zinc oxide whisker.

[0033] Blow air into different nanoscale additives in zinc vapor, such as ZrO 2 , SiO 2 、Al 2 o 3 、TiO 2 , ZnS, CaO, ZnCO 3 , MgO, CaCO 3 , mica, zeolite, glass, activated carbon, clay powder, composite oxide, etc. as additives, or contact zinc vapor with various coating surfaces in the air, can co...

Embodiment 3

[0035] First add 2kg of metal zinc powder into the zinc evaporation furnace, heat the zinc evaporation furnace, and when the temperature reaches 900°C, introduce the generated zinc vapor into the oxidation reaction electric furnace. Add a certain amount of CO to the air 2 Gas is used as an auxiliary gas to form different oxidizing atmospheres, and four-needle zinc oxide whiskers with different sizes and different whisker aspect ratios can be obtained. By controlling different reaction temperatures at a temperature of 650-1300°C, the reaction formation rates of the four-needle ZnO whiskers are different. Metal zinc powder can be added regularly.

[0036] Properly inject a certain amount of inert gas, CO, SO into the air 2 The gas is used as an auxiliary gas to form a different oxidizing atmosphere, and it can also play a role in interacting with CO 2 The gas has the same effect and obtains four-needle zinc oxide whisker products.

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Abstract

The present invention is normal pressure zinc vapor oxidizing process for preparing four-needle zinc oxide whisker. Under normal pressure, metal zinc ingot, industrial coarse zinc product, zinc alloy, zinc containing waste, etc as material is heated directly to produce zinc vapor, or zinc vapor generated during smelting is used as the material, and the zinc vapor is oxidized via contacting with air or oxygen to produce four-needle zinc oxide whisker. The production process can obtain high quality four-needle zinc oxide whisker in the identical shape, and the production process is simple and may be continuous. The prepared four-needle zinc oxide whisker may be used in polymer material, antistatic material, antiwear and antiskid material, etc.

Description

technical field [0001] The invention relates to a technique for preparing tetrapod-shaped zinc oxide whiskers by an atmospheric pressure zinc vapor oxidation method, which belongs to the field of inorganic material technology and nonferrous metallurgy. In particular, it relates to a technical method for preparing tetraacicular zinc oxide whiskers by using zinc vapor generated by heating zinc-containing materials or smelting zinc vapor as raw materials, directly contacting with air and being oxidized. Background technique [0002] Tetrapod-like Zinc Oxide Whisker (T-ZnOw for short) is a single crystal fiber grown in a three-dimensional tetrapod shape. The unique structure of four-needle ZnO whiskers makes it a reinforcing material, and T-ZnOw also has outstanding multifunctional properties, such as excellent wear resistance, anti-skid, noise reduction, wave absorption, anti-aging, and impact resistance , Antistatic, anti-algae, antibacterial, etc. Compared with ordinary zin...

Claims

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Application Information

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IPC IPC(8): C30B29/16C30B29/62C01G9/03C22B19/34
Inventor 李敦钫于月光任先京曾克里谢建刚
Owner BEIJING GENERAL RES INST OF MINING & METALLURGY
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