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Rare earth crystal growing equipment, rare earth crystal growing process and application

A technology of crystal growth and crystal growth furnace, which is applied in the directions of crystal growth, single crystal growth, single crystal growth, etc. It can solve the problem that the image of the growth process cannot be remotely monitored and recorded, and there is a lack of special pulling growth equipment and human resources for rare earth crystal growth. Waste and other issues

Inactive Publication Date: 2017-05-31
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the small observation area of ​​the upper observation element, when growing large-scale high-temperature rare earth crystals, the observation hole of the temperature field structure constructed by the insulation material is opened above the temperature field, that is, the upper observation element can only be used for monitoring, and the observation hole above the furnace is too large. Due to the small size, the crystal growth process can only be observed with the naked eye by the crystal growth personnel, that is, the growth process images cannot be remotely monitored and recorded
In rare earth crystal growth, this will cause a great waste of human resources
In addition, most of the pulling growth equipment on the market is general-purpose crystal growth equipment, which requires crystal growth personnel to build a temperature field structure for the crystal to be grown, and there is a lack of special pulling growth equipment for rare earth crystal growth.

Method used

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  • Rare earth crystal growing equipment, rare earth crystal growing process and application
  • Rare earth crystal growing equipment, rare earth crystal growing process and application
  • Rare earth crystal growing equipment, rare earth crystal growing process and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] Rare earth crystal growth equipment is provided: a crystal growth furnace; a heating element is arranged inside the crystal growth furnace, and the heating element is preferably an iridium product and a Cu induction coil; the size of the iridium product is preferably φ130mm and a depth of 130mm; The size of the Cu induction coil is preferably 2 to 3 times the size of the iridium product; the side wall of the furnace body of the crystal growth furnace preferably includes a first insulation material layer, a second insulation material layer and The third insulation material layer; the first insulation material layer is a zirconia insulation material; the second insulation material layer is formed of zirconia and alumina; the third insulation material layer is a zirconia insulation material; the first The density of an insulating material layer is preferably 4.5g / cm 3 The thickness of the first insulation layer is 2.5cm; the density of the second insulation material layer is...

Embodiment 2

[0066] The rare earth crystal growth equipment in Example 1 is provided.

[0067] CeO with a purity higher than 99.995% 2 , Y 2 O 3 , Al 2 O 3 Powder, according to CeO 2 :Y 2 O 3 :Al 2 O 3 =0.03:2.97:5, weighing, pressing and sintering into a round cake Ce:Y 3 Al 5 O 12 Polycrystalline raw materials. 1000g successive crystal blocks are stacked into the Ir crucible in the above-mentioned crystal growth furnace, and the [111] direction seed crystal is loaded at the front end of the seed rod. Adjust the observation position and angle of the high temperature camera above the crystal growth furnace to focus on the center of the melt surface. Fill the furnace with high purity N after vacuuming 2 The gas is used as a protective gas to heat up the melt (polycrystalline block). Use the chemical bonding theory calculation of crystal growth to determine the dominant growth direction [111], and calculate Ce:Y 3 Al 5 O 12 The pulling growth rate along the [111] direction is 2.5~6.0mm / h, and ...

Embodiment 3

[0070] The rare earth crystal growth equipment in Example 1 is provided.

[0071] According to the above process, Lu with purity higher than 99.995% 2 O 3 , SiO 2 , CeO 2 Powder, according to Lu 2 O 3 :SiO 2 :CeO 2 =1.195:1:0.005 proportioning, weighing, pressing and sintering into a round cake Ce:Lu 2 SiO 5 Polycrystalline raw materials. Put 3400g of successive crystal blocks into the Ir crucible in the above-mentioned crystal growth furnace, and load the [010] direction seed crystal at the front end of the seed rod. Adjust the observation position and angle of the high temperature camera above the crystal growth furnace to focus on the center of the melt surface. After the furnace is evacuated, it is filled with high-purity Ar as a protective gas, and the molten material (polycrystalline block) is raised. Use the chemical bonding theory calculation of crystal growth to determine the dominant growth direction [010], and calculate Ce:Lu 2 SiO 5 The pulling growth rate along the ...

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Abstract

The invention provides rare earth crystal growing equipment which comprises a crystal growing furnace, wherein a heating element is arranged in the crystal growing furnace; an observing window is formed in the top end of the hearth of the crystal growing furnace; a circulating cooling water system is arranged in the periphery of the observing window out of the top end of the hearth of the crystal growing furnace; and an image observing element is arranged on the upper portion of the observing window out of the top end of the hearth of the crystal growth furnace. Compared with the prior art, as the circulating cooling water system is arranged out of the observing window at the top end of the hearth of the crystal growing furnace, heat transferred to the top end of the hearth in a crystal growing process can be taken away, thereby providing a proper working environment for mounting the image observing element out of the observing window while realizing remote observation of a crystal lifting furnace through the image observing element.

Description

Technical field [0001] The invention relates to the technical field of crystal materials, in particular to rare earth crystal growth equipment, rare earth crystal growth technology and applications. Background technique [0002] As an important medium for conversion of light, sound, and electricity, rare earth functional crystal materials can provide high-quality working materials for a variety of important key devices. Rare earth scintillation crystals have the characteristics of high density, high light output, and fast attenuation, which meet the basic requirements for scintillators in high energy physics, nuclear medicine and other application fields. Rare earth photoelectric crystal materials can realize the interaction and conversion of electricity and light, and are widely used Used in the fields of communications, aerospace, medicine, geology, meteorology, architecture, military technology, etc. [0003] The crystal growth furnace produced by the French Cyberstar company i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B29/22C30B15/00C30B15/26
CPCC30B29/22C30B15/00C30B15/26
Inventor 薛冬峰孙丛婷
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI