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Molten-salt growth method for zinc oxide single crystal

A zinc oxide single crystal and growth method technology, which is applied in the direction of single crystal growth, single crystal growth, crystal growth, etc., can solve the problems of lower growth temperature, high crystal price, complicated equipment, etc., and achieve the effect of improving quality and clear screen

Inactive Publication Date: 2007-12-19
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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Problems solved by technology

The disadvantages of the hydrothermal synthesis method are high risk, expensive equipment, long period, high cost, and high crystal price; while the gas phase method is also dangerous, complicated equipment, high cost, and high crystal price ; Relatively speaking, the use of molten salt growth can reduce the growth temperature and reduce the volatilization of ZnO. At the same time, it is also possible to modify the crystal by selecting suitable fluxes and doping with suitable ions in the crystal, such as , for the preparation of ZnO semiconductor devices, it is beneficial to form the p-n junction

Method used

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  • Molten-salt growth method for zinc oxide single crystal

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Embodiment 1

[0020] The ZnO single crystal was grown by the molten salt method, and the raw materials used were analytically pure BaO and H 3 BO 3 , and spectrally pure ZnO. The flux is selected from BaO-B 2 o 3 -ZnO system. Then carry out batching according to the following ratio: BaO: B 2 o 3 :ZnO=35mol%: 35mol%: 65mol%.

[0021] After the raw materials are weighed, they are ground and mixed evenly with an agate mortar, and then put into a platinum crucible of Ф55mm×60mm, placed in a growth furnace, heated up until the raw materials are melted, crystallized spontaneously, and the seed crystals grow first. Then use the trial seed crystal method to measure the saturation temperature of the melt to be about 1100°C, keep the temperature at about 50°C above the saturation temperature for 24 hours, then lower the seed crystal to the melt, and drop to the saturation temperature after half an hour. The temperature was lowered at a rate of ℃ / d, and after about 10 days of growth, the crysta...

Embodiment 2

[0024] The ZnO single crystal was grown by the molten salt method, and the raw materials used were analytically pure BaO and H 3 BO 3 , and spectrally pure ZnO. The flux is selected from BaO-B 2 o 3-ZnO system. Then carry out batching according to the following ratio: BaO: B 2 o 3 :ZnO=40mol%: 40mol%: 60mol%.

[0025] After the raw materials are weighed, they are ground and mixed evenly with an agate mortar, and then put into a Ф55mm×60mm platinum crucible, placed in a growth furnace, heated up until the raw materials are melted, crystallize spontaneously, and grow seed crystals first. Then use the seed crystal method to measure the saturation temperature of the melt to be about 1050°C, keep the temperature at about 50°C above the saturation temperature for 24 hours, then lower the seed crystal to the melt, and drop to the saturation temperature after half an hour, start with 2 to 15 The temperature is lowered at the rate of ℃ / d, and the method of periodically accelerat...

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Abstract

This invention relates to the growth of zinc oxide (ZnO) single crystal by using molten-salt method. In this invention, the raw materials are: analytical agent barium oxide (BaO), boric acid (H3BO3) and specpure zinc oxide (ZnO). By using barium borate (BaB2O4) as fluxing agent, the invented single crystal is produce, with temperature reducing rate of 2-15 deg.C / d.

Description

Technical field: [0001] The invention relates to the field of crystal material growth and preparation, in particular to a ZnO single crystal molten salt growth method. Background technique: [0002] ZnO crystal is a multifunctional crystal. It is not only a new type of semiconductor laser (LD) and light emitting (LED) material that is popular in research today, but also a substrate material suitable for making substrates of nitride semiconductors and other devices, and it is also a solid-state laser substrate, A composite material with multiple functions such as piezoelectricity, electro-optic, and acousto-optic. [0003] In foreign countries, scientists have done a lot of research on the growth, structural properties, luminescent properties and electrical properties of ZnO crystals. In 1966, Y.S.Park and D.C.Retnolds of the Ohio Air Force Base Aviation Research Laboratory grew high-quality crystals and conducted preliminary research on their structural properties (2). At ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B29/48C30B9/12H01S3/16
Inventor 涂朝阳朱昭捷李坚富游振宇王燕
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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