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Method for preparing lamellar-form borate crystal material

A crystal material and morphology technology, applied in the field of preparation of boric acid crystal materials, can solve the problems of complex preparation process, harsh reaction conditions, and large environmental pollution, and achieve the effects of low preparation temperature, cheap raw materials, and environmental friendliness

Active Publication Date: 2013-03-13
吴文婕
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These preparation methods all have their unique advantages, but most of the disadvantages lie in the high price of raw materials, low product purity, poor crystallinity, complicated preparation process, harsh reaction conditions, and large environmental pollution.

Method used

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  • Method for preparing lamellar-form borate crystal material
  • Method for preparing lamellar-form borate crystal material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] 1) Dissolve 1g of analytically pure borax and 0.2mL of 80% acetic acid in 50mL of distilled water to prepare a solution;

[0019] 2) Transfer the solution into a polytetrafluoroethylene-lined hydrothermal kettle, control the filling ratio to 70%, then put the reaction kettle into a constant temperature reactor, control the temperature at 80°C, and react for 15 hours;

[0020] 3) After the reaction system is naturally cooled to room temperature, the product in the hydrothermal kettle is centrifuged and washed 3 to 8 times with distilled water and absolute ethanol. Dry in a vacuum drying oven to obtain a high-purity layered boric acid crystal material.

[0021] Depend on figure 1 And the standard card 73-2158 shows that the product is a high-purity boric acid boric acid crystal material, and its diffraction peak on the (002) crystal plane is extremely sharp, and the diffraction peak intensity is very large.

[0022] to combine figure 1 Depend on figure 2 It can be se...

Embodiment 2

[0024] 1) Dissolve 1 g of analytically pure borax and 0.5 mL of 80% acetic acid in 75 mL of distilled water to prepare a solution;

[0025] 2) Transfer the solution into a polytetrafluoroethylene-lined hydrothermal kettle, control the filling ratio to 60%, then put the reaction kettle into a constant temperature reactor, control the temperature at 120°C, and react for 9 hours;

[0026] 3) After the reaction system is naturally cooled to room temperature, the product in the hydrothermal kettle is centrifuged and washed 3 to 8 times with distilled water and absolute ethanol respectively, the centrifugal speed is 1200r / min, and the centrifugation time is 5min each time. Dry in a vacuum drying oven to obtain a high-purity layered boric acid crystal material.

Embodiment 3

[0028] 1) Dissolve 1 g of analytically pure borax and 0.8 mL of 80% acetic acid in 100 mL of distilled water to prepare a solution;

[0029] 2) Transfer the solution into a polytetrafluoroethylene-lined hydrothermal kettle, control the filling ratio to 50%, then put the reaction kettle into a constant temperature reactor, control the temperature at 160°C, and react for 4 hours;

[0030] 3) After the reaction system is naturally cooled to room temperature, the product in the hydrothermal kettle is centrifuged and washed 3 to 8 times with distilled water and absolute ethanol respectively, the centrifugation speed is 800r / min, and the centrifugation time is 3min each time, and finally the product is washed at 60°C. Dry in a vacuum drying oven to obtain a high-purity layered boric acid crystal material.

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Abstract

The invention discloses a method for preparing a lamellar-form borate crystal material, which comprises the following steps: dissolving borax and an ethylic acid in distilled water, then transferring the solution into a teflon-lined hydrothermal kettle; after constant-temperature heating reaction, naturally cooling the reaction product to room temperature; sequentially carrying out centrifugal washing on the obtained product in the hydrothermal kettle separately by using distilled water and absolute ethyl alcohol; and after centrifugal separation, carrying out vacuum drying so as to obtain a high-purity lamellar-form borate crystal material. Compared with borate crystals prepared by using traditional methods, borate crystals prepared by using the method disclosed by the invention has the advantages that raw materials are cheap, purity is high, grain size distribution is narrow, grain agglomeration degree is low, crystal growth is complete, form and size are controllable, the process is simple and efficient, preparation temperature is low, later crystallization does not need to be carried out, and the defects of grain growth, coarsening or curling and the like possibly caused in the process of later heat treatment can be avoided to a certain extent.

Description

technical field [0001] The invention relates to a method for preparing a boric acid crystal material with controllable morphology, in particular to a method for preparing a boric acid crystal material with a layered morphology. Background technique [0002] Boric acid is an important inorganic chemical product and raw material, and plays an important role in the national economy. Boric acid is mainly used in the manufacture of glass, enamel and ceramics [A. Mergen, M. H. Demirhan and M. Bilen. Processing of boric acid from borax by a wet chemical method[J]. Advanced Powder Technology, 2003, 14(3): 279-293. ], especially optical glass, heat-resistant glass, and acid-resistant glass, which can improve the heat resistance and transparency of glass products, increase the mechanical strength of glass, shorten the melting time, and also enhance the gloss and fastness of enamel products. It is also one of the ingredients of glazes and pigments. In the nuclear industry, nucl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B35/10C30B7/10C30B29/22
Inventor 黄剑锋杨柳青曹丽云王雅琴费杰
Owner 吴文婕
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