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Hydrothermal equipment for inhibiting growth of mixed crystals

A technology for inhibiting the growth of water and crystals, which is applied in the field of equipment related to hydrothermal growth of crystals, and can solve the problems of difficult control, poor operability, and reduced mass transfer speed.

Inactive Publication Date: 2012-07-04
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, the speed of convective mass transfer is generally controlled by reducing the temperature difference between the dissolution zone and the growth zone, but this method has poor operability and is difficult to control. Therefore, it is necessary to develop a device that can freely control convective mass transfer from the perspective of equipment. Mass-velocity hydrothermal equipment
[0006] Experiments have found that if the compost is placed in a relatively closed cuboid or cylinder, and small holes for convective mass transfer are drilled on the side and bottom of the cuboid or cylinder, the convective mass transfer rate will be greatly reduced. Formation and growth are inhibited, as well as convective mass transfer rates are greatly reduced if the seeds are placed in similar equipment

Method used

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  • Hydrothermal equipment for inhibiting growth of mixed crystals
  • Hydrothermal equipment for inhibiting growth of mixed crystals

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0015] Use Ni-Cr alloy material to process the nutrient basket and growth basket with an outer diameter of 30mm and an inner diameter of 28mm. The height of the nutrient basket is 100mm, and the height of the growth basket is 150mm. Drill 30 small holes with a diameter of 2mm on the nutrient basket. Drill 80 small holes with a diameter of 2mm in the growth basket. Experiments show that the convective mass transfer rate under this condition is 50% lower than that of the hydrothermal kettle without nutrient baskets and growth baskets, and the number of spontaneously nucleated miscellaneous crystals is reduced by 80%.

example 2

[0017] Similar to Example 1, the difference is that Ti alloy materials are used to process the nutrient basket and the growth basket. Experiments show that the convective mass transfer rate under this condition is 50% lower than that of the hydrothermal kettle without the nutrient basket and the growth basket. , the number of heterocrystals spontaneously nucleated decreased by 80%.

example 3

[0019] Similar to Example 1, the difference is that the diameter of the small hole on the nutrient basket and the growth basket is 3 mm. Experiments show that the convective mass transfer rate under this condition is lower than that of the hydrothermal kettle without the nutrient basket and the growth basket. The number of heterocrystals spontaneously nucleated decreased by 60%.

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Abstract

The invention discloses hydrothermal equipment for inhibiting growth of mixed crystals under a hydrothermal condition. The equipment comprises a nutrient basket with holes, and a crystal growth basket with holes; and convection speed of a hydrothermal growth kettle is controlled by controlling aperture ratio and the specific surface of a cultivation material, so the aim of reducing the number of the mixed crystals is fulfilled. The hydrothermal equipment is simple in structure, low in cost and high in operability.

Description

technical field [0001] The invention relates to a hydrothermal equipment and technology for inhibiting the growth of miscellaneous crystals under hydrothermal conditions, and belongs to the technical field of equipment related to hydrothermal growth of crystals. Background technique [0002] The growth of crystals by hydrothermal method refers to: pour the mineralizer solution into the hydrothermal kettle, and the perforated baffle in the hydrothermal kettle divides the lining of the hydrothermal kettle into two areas. The lower area is called the dissolution area, and the hydrothermal Growth medium, the upper area is called the growth area, the seed crystal is placed, and through temperature control technology, the dissolution area is in a high temperature state, while the growth area is in a low temperature state, so that the saturated solution in the dissolution area is transported to the In the growth zone, due to the decrease in temperature, the saturated solution becom...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B7/10
Inventor 黄丰林文文陈达贵黄顺乐黄嘉魁
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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