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Process for preparing zinc oxide whiskers with different forms by using gasification and oxidation method

A technology of zinc oxide whiskers and oxidation method, which is applied in chemical instruments and methods, zinc oxide/zinc hydroxide, single crystal growth, etc., can solve the problems of production cost reduction, and achieve cost reduction, process simplification, and cheap raw materials Effect

Inactive Publication Date: 2002-11-20
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing preparation methods need to be further simplified. The production cost of multi-legged whiskers needs to be reduced by using Zn / Sn alloys. However, there are few reports on the preparation of ZnO whiskers with other shapes, which cannot meet the requirements of technological development. need

Method used

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  • Process for preparing zinc oxide whiskers with different forms by using gasification and oxidation method
  • Process for preparing zinc oxide whiskers with different forms by using gasification and oxidation method
  • Process for preparing zinc oxide whiskers with different forms by using gasification and oxidation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Take a certain amount of zinc powder and sprinkle evenly on the bottom of a corundum crucible, put the crucible into a high-temperature furnace pre-heated to 700°C, control the reaction time at 60 minutes, then take out the crucible, and collect the white soft cotton on the upper layer ZnO whiskers can be obtained from tetrapod ZnO whiskers.

[0041] Repeat the above steps, raise the temperature to 900°C, and reduce the heating time to 20 minutes to obtain similar products.

[0042] Repeat the above operation steps, raise the temperature to 1200° C., and reduce the heating time to 5 minutes to obtain similar products.

[0043] The product is identified as a pure-phase zinc oxide crystal by X-ray powder diffraction detection. Four-legged whiskers detected by SEM

Embodiment 2

[0045] Take a certain amount of zinc powder and sprinkle evenly on the bottom of a corundum crucible, put the crucible into a high-temperature furnace pre-heated to 700°C, control the reaction time at 20 minutes, then take out the crucible, cool for 5 seconds, and continue heating After 30 minutes, samples were collected on the surface to obtain bundles of tubular zinc oxide crystals.

[0046] Repeat the above operation steps, raise the temperature to 900°C, control the reaction time at 10 minutes, cool for 60 seconds, and continue heating for 10 minutes to obtain similar products.

[0047] Repeat the above operation steps, raise the temperature to 1200°C, control the reaction time at 5 minutes, cool for 2 minutes, and continue heating for 5 minutes to obtain similar products.

[0048] The product is identified as a pure-phase zinc oxide crystal by X-ray powder diffraction detection. It was detected as bunch of tubular whiskers by SEM.

Embodiment 3

[0050] Dissolve 0.75 grams of copper sulfate pentahydrate in deionized water to form about 30 milliliters of a 0.1 mol / liter solution, quickly pour 20 grams of zinc powder into the solution, stir to complete the reaction, filter the product while it is hot, and fully wash it with deionized water. The product was dried at 80° C. for 4 hours, and the product was taken out and ground into powder. Take a certain amount of precursor and spread it evenly on the bottom of a corundum crucible. Put the crucible into a high-temperature furnace pre-heated to 700°C, control the reaction time at 60 minutes, and then take out the crucible to collect multi-legged zinc oxide whiskers.

[0051] Repeat the above operation steps, increase the temperature to 900°C, reduce the reaction time to 20 minutes, increase the solution concentration to 2 mol / L, and keep other conditions unchanged, take any one of the above heating conditions to obtain similar products.

[0052] Similar products can also b...

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Abstract

The technological process of preparing zine oxide whiskers with different forms by using gasification oxidation method is characterized by that it uses zine powder as raw material, in the temperaturerange of 700 deg.C-1200 deg.C in makes the zinc powder undergo the processes of gasification and oxidation treatment, and fully utilizes the low boilding point property, introduces the active grwoth point control method and adopts the different control modes, such as controlling growth air flow and controlling cooling mode, etc. to respectively obtain the four-foot, multiple feet, beam-tube, comb, feather and array zinc oxide whiskers.

Description

technical field [0001] The invention relates to a method for preparing zinc oxide whiskers, in particular to a process method for preparing zinc oxide whiskers with different shapes by using a gasification oxidation method, and belongs to the technical field of inorganic material preparation processes. Background technique [0002] Zinc oxide itself has excellent optical and electrical properties, such as piezoelectricity, semiconductor, and photorefraction, and its low price lays the foundation for its wide application. Zinc oxide whiskers are widely used in modern industry. Four-legged and multi-legged zinc oxide whiskers can be widely used as reinforcing materials for metals, alloys, ceramics, rubber, resins, plastics and other materials, and can be isotropic to improve their tensile, bending, wear and other properties and high temperature Excellent chemical stability and shape stability; with high specific gravity, it can be used as sound-absorbing and shock-resistant m...

Claims

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Application Information

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IPC IPC(8): C01G9/03C30B29/16C30B29/62
Inventor 李亚栋孙晓明
Owner TSINGHUA UNIV
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