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Process for growing zine oxide monocrystal by hot water method

A zinc oxide single crystal and hydrothermal technology, applied in chemical instruments and methods, single crystal growth, crystal growth and other directions, can solve the problems of high energy consumption between particles, high agglomeration, mixed impurities, etc., and achieves simple process and low cost. low effect

Inactive Publication Date: 2007-05-23
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method also needs to go through a high-temperature process, which has high energy consumption and is easy to cause high agglomeration between particles and easy mixing of impurities.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] The precursor zinc hydroxide powder is added to deionized water to form a solution and beated, and ammonia water is added to adjust the pH value of the solution to be greater than 11, and then the slurry is added to the autoclave; the solution is heated at 50 ° C / min Rapidly heat up to 100°C at a heating rate, keep the temperature for 2 hours, cool naturally to room temperature, filter and separate the precipitate, and dry the precipitate to obtain zinc oxide single crystal hexagonal columnar long fibers. Its average length is 4 μm, and its average diameter is 200 nm. Scanning electron microscope observations showed that the fibers grew in the form of linear crystals, and the thickness of the fibers was roughly the same, but the diameter of each fiber was almost constant. The product is analyzed by X-ray diffraction, and the result shows that it is zinc oxide single crystal long fiber with extremely high purity.

Embodiment 2

[0015] Add the precursor zinc hydroxide powder to deionized water to form a solution and make a slurry, add ammonia water to adjust the pH value of the solution to be greater than 11, then add the slurry to the autoclave; Rapidly heat up to 200°C at a heating rate, keep the temperature for 2 hours, then cool down to room temperature naturally, filter and separate the precipitate, and dry the precipitate to obtain zinc oxide single crystal hexagonal columnar long fibers. Its average length is 10 μm, and its average diameter is 500 nm.

Embodiment 3

[0017] The precursor zinc hydroxide powder is added to deionized water to form a solution and beated, and ammonia water is added to adjust the pH value of the solution to be greater than 11, and then the slurry is added to the autoclave; the solution is heated at 50 ° C / min Rapidly heat up to 100°C at a heating rate, keep the temperature for 5 hours, cool down to room temperature naturally, filter and separate the precipitate, dry the precipitate to obtain zinc oxide single crystal hexagonal columnar long fibers. Its average length is 6 μm, and its average diameter is 300 nm.

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Abstract

A method of growing the single crystal of the zinc oxide with hydrothermal method. It chooses the zinc hydroxide as the predecessor and the ammonia as the mineralizer and grows the crystal of the zinc oxide through heating in autoclave. The heating method can be the microwave heating or the resistance wire heating. The crystal can be the zinc oxide nanometer fiber or massive single crystal of zinc oxide. The invention is featured by simple technique and low cost and controlling the size of the zinc oxide crystal by changing the condition of the technique.

Description

technical field [0001] The invention relates to a method for preparing zinc oxide crystals by a hydrothermal method, belonging to the field of inorganic non-metallic materials. Background technique [0002] Zinc oxide has the characteristics of large band gap, high electron migration saturation rate, small dielectric constant, and good thermal stability. The third generation of semiconductor materials; in the field of optoelectronics, zinc oxide can also be used in light collection devices such as solar cells and color sensors; because the mechanical and physical and chemical properties of zinc oxide single crystal fibers are close to those of ideal single crystals, zinc oxide fibers can be widely used It is used as reinforcing material for ceramics, rubber, resin, plastic and other materials; in addition, zinc oxide fiber is also widely used in the fields of conductivity, antistatic, wave absorption, sound absorption, vibration reduction, wear resistance and anti-skid of co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C30B7/10C30B29/16
Inventor 江锦春沈德忠
Owner TSINGHUA UNIV