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Preparation method of quartz raw material for low deformation rate crucible suitable for single crystal production

A low-distortion, quartz technology, applied in glass manufacturing equipment, manufacturing tools, glass molding, etc., can solve problems such as increased production costs, failure of single crystal crystallization, and impact on yield of single crystal crystallization, so as to reduce production costs, The effect of improving the yield rate

Active Publication Date: 2017-03-29
FUDONG LIGHTING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The quartz crucible used in the molding process of compound single crystal crystallization generally requires its deformation rate to be extremely low. If the deformation rate of the quartz crucible and tube is large during use, it will cause the single crystal furnace to burst, and the whole furnace single crystal crystallization will fail. The yield of crystal crystal is greatly affected, and the production cost is also increased

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Example 1, a method for preparing a quartz raw material for a low deformation rate crucible suitable for single crystal production, the steps are as follows: (1) Raw material treatment: the raw quartz stone is pulverized by a pulverizer to obtain the particle size and mass percentage of quartz sand as follows:

[0021] 40-60 mesh ≤3%;

[0022] 60-80 mesh 20-40%;

[0023] 80-120 mesh 40-60%;

[0024] 120-140 mesh 5-25%;

[0025] (2) Pickling and cleaning: Mix the above-mentioned quartz sand and mixed acid into the dynamic acid soaking machine at a weight ratio of 1.8:1, stir and soak for 8 hours, and the temperature of the acid soak is 40°C; the concentration of the mixed acid in mass percentage is 30 % hydrochloric acid, 40% hydrofluoric acid and 60% nitric acid are used as raw materials, and the weight ratio of hydrochloric acid, hydrofluoric acid and nitric acid is 3:0.8:0.5; after pickling, use pure water to clean;

[0026] (3) Float cleaning: add water to the cl...

Embodiment 2

[0031] Example 2, a method for preparing a quartz raw material for a low deformation rate crucible suitable for single crystal production, the steps are as follows: (1) Raw material treatment: the raw quartz stone is pulverized by a pulverizer to obtain the particle size and mass percentage of the quartz sand as follows:

[0032] 40-60 mesh ≤3%;

[0033] 60-80 mesh 20-40%;

[0034] 80-120 mesh 40-60%;

[0035] 120-140 mesh 5-25%;

[0036] (2) Pickling cleaning: Mix the above-mentioned quartz sand and mixed acid into the dynamic acid soaking machine at a weight ratio of 2:1, stir and soak for 10 hours, and the temperature of the pickling bubble is 450°C; the concentration of the mixed acid in mass percentage is 36 % hydrochloric acid, 42% hydrofluoric acid and 65% nitric acid are used as raw materials, and the weight ratio of hydrochloric acid, hydrofluoric acid and nitric acid is 3:1.2:0.5; after pickling, use pure water to clean;

[0037] (3) Float cleaning: add water to ...

Embodiment 3

[0042] Example 3, as described in Example 1 or 2, in the preparation method of quartz raw materials for low deformation rate crucibles suitable for single crystal production: in step (3), after flotation, wash and dry, and use a spin dryer for drying Run for 20-30 minutes.

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Abstract

The invention relates to a preparation method of a quartz raw material for a low-deformation-rate crucible applicable to production of single crystals. The preparation method comprises the following steps: firstly grinding raw quartz stone to obtain quartz sand of different particle sizes, carrying out acid pickling by virtue of a mixed acid of hydrochloric acid, hydrofluoric acid and nitric acid, and carrying out secondary flotation to remove iron minerals and feldspar in the quartz sand; carrying out chlorination treatment and element doping, adding a mixture of Ba(NO3)2, Al(NO3)3, Zr(NO3)4 and water into the quartz sand, stirring for 3-4 hours, drying, and cooling to obtain the quartz raw material. According to the preparation method, elements including Ba, Al and Zr are doped into the quartz raw material in the preparation process so as to prepare the low-deformation-rate quartz raw material, and the deformation rate of the crucible prepared from the quartz raw material does not exceed 1% after the crucible is used at 1200 DEG C for 10 days and is just accordant with formation time of about 15 days of single crystal crystallization, so that the yield of the single crystal crystallization is guaranteed to be improved, and the preparation cost of the single crystal crystallization is lowered.

Description

technical field [0001] The invention relates to a production method for preparing raw materials for quartz crucibles, in particular to a method for preparing quartz raw materials for low deformation rate crucibles suitable for single crystal production. Background technique [0002] The quartz crucible used in the molding process of compound single crystal crystallization generally requires its deformation rate to be extremely low. If the deformation rate of the quartz crucible and tube is large during use, it will cause the single crystal furnace to burst, and the whole furnace single crystal crystallization will fail. The yield of the crystal is greatly affected, and the production cost is also increased. The deformation rate of quartz crucible is mainly related to its quartz raw material. Contents of the invention [0003] The technical problem to be solved by the present invention is to propose a method for preparing quartz raw materials for crucibles with high produc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03B20/00
Inventor 陶明顿濮阳坤张尧
Owner FUDONG LIGHTING
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