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Method for growing zinc oxide monocrystalline under hydrothermal condition by utilizing mineralizer

A technology of zinc oxide single crystal and zinc oxide, applied in chemical instruments and methods, single crystal growth, single crystal growth, etc., can solve the problems of high heating temperature, high requirements for hydrothermal reaction kettle and its substrate, etc., and achieve growth Fast speed, low cost, and the effect of reducing costs

Active Publication Date: 2011-07-20
SHANDONG UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0006] Aiming at the problems in the prior art of hydrothermal growth of zinc oxide single crystal, the heating temperature is too high, and the requirements for the hydrothermal reaction kettle and its substrate are relatively high, the present invention provides a method for growing zinc oxide single crystals under hydrothermal conditions using a chlorine-containing salt mineralizer. Zinc Single Crystal Method

Method used

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  • Method for growing zinc oxide monocrystalline under hydrothermal condition by utilizing mineralizer
  • Method for growing zinc oxide monocrystalline under hydrothermal condition by utilizing mineralizer
  • Method for growing zinc oxide monocrystalline under hydrothermal condition by utilizing mineralizer

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Embodiment 1

[0030] The zinc hydroxide suspension is used as the growth raw material, and placed in a high-pressure reactor made of high-temperature alloy steel with an inner diameter of Φ4cm and a height of 9cm. The inner lining of the high-pressure reactor is polytetrafluoroethylene. Fill the reactor with deionized water, use sodium chloride as a mineralizer, and control the chloride ion concentration in the solution to 0.05mol / L. The pH of the hydrothermal solution was adjusted to 6 by adding sodium hydroxide solution. At the same time, the filling degree of the autoclave is 60%. Place a zinc metal wire as a seed crystal in the solution on the upper part of the autoclave, and seal the mouth of the autoclave. The autoclave was heated with microwaves to keep the temperature of the autoclave constant at 90°C. After one day of heat preservation, ZnO microcrystals can grow on the seed crystal. Such as figure 2 shown.

Embodiment 2

[0032]1 kilogram of zinc hydroxide dense fragments is used as the growth material 7, placed on the bottom of the autoclave 1 made of high-temperature alloy steel with an inner diameter of Φ8cm and a height of 0.5m, and a partition 4 is added above the zinc hydroxide growth material. The inner liner 6 is polytetrafluoroethylene, and there is an insulation layer 5 outside the autoclave. Fill into deionized water in reactor, use the mixture (0.25mol / lZnCl2+0.5mol / l NaCl) of zinc chloride and sodium chloride as mineralizer, add a certain amount of sodium hydroxide to dissolve the The pH value was adjusted to 9, and the chloride ion concentration in the control solution was 1mol / L. At the same time, the filling degree of the autoclave is 80%. After the (0001) oriented ZnO seed crystal 3 is placed in the upper solution of the autoclave with the seed crystal frame 8, the mouth of the autoclave is sealed. Use nickel-chromium resistance wires to heat the autoclave in two sections, up...

Embodiment 3

[0034] 1 kg of zinc oxide dense compact is used as the growth material, and placed in the bottom of the autoclave made of high-temperature alloy steel with an inner diameter of Φ8cm and a height of 0.5m. A partition is added above the zinc oxide growth material, and the inner lining of the autoclave is silver metal. Charge deionized water into the autoclave, use a mixture of lithium chloride and sodium chloride (0.25mol / l LiCl+0.75mol / l NaCl) as a mineralizer, add sodium hydroxide solution to adjust the pH value to 10, Control the chloride ion concentration in the solution to 1mol / L. At the same time, the filling degree of the autoclave is 90% (volume). After placing the (0001) oriented ZnO seed crystal block in the upper solution of the autoclave, the mouth of the autoclave was sealed. Use nickel-chromium-aluminum resistance wires to heat the autoclave in upper and lower sections; a group of resistance wires at the bottom of the autoclave is heated to 280 ° C; a group of res...

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Abstract

The invention relates to a method for growing a zinc oxide monocrystalline under a hydrothermal condition by utilizing a mineralizer. By taking zinc oxide or zinc hydroxide as raw materials for crystal growth, chloride salt as the mineralizer and deionized water as a growing solvent, crystal growth is performed in a high pressure hydro-thermal reaction kettle under different pH values. With the method provided by the invention, the growth speed of a zinc oxide monocrystalline is high, a simple process and low cost are realized, zinc oxide monocrystallines with different sizes can be obtained through controlling the process condition.

Description

technical field [0001] The invention relates to a method for growing zinc oxide single crystals under hydrothermal conditions by using a mineralizer, belonging to the field of crystal materials. Background technique [0002] Zinc oxide is an important wide-bandgap II-VI compound semiconductor material, which has the characteristics of high electron migration saturation rate, small dielectric constant, and good thermal stability. , Candidate materials for high-power and high-density integrated electronic devices; in the optoelectronic field, zinc oxide can also be applied to light collection devices such as solar cells and color sensors; in the piezoelectric field, zinc oxide can be applied to piezoelectric conversion and sensor devices. In addition, due to the vigorous development of nanotechnology, the coupling effect between various properties of zinc oxide enables it to be used in piezoelectric electronics, transparent electronics and other fields, such as making nano-opt...

Claims

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Application Information

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IPC IPC(8): C30B7/10C30B29/16
Inventor 王继扬黄林勇刘宏胡陈果赵兰玲刘铎
Owner SHANDONG UNIV
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