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Preparation method of barium metaborate nano-powder

A nano-powder, barium metaborate technology, applied in borates, boron oxides, sustainable manufacturing/processing, etc., can solve the problems of inability to convert raw materials into products, complex process flow, harsh reaction conditions, etc. The effect of easy operation, simple preparation process and low equipment requirements

Inactive Publication Date: 2010-12-15
HEBEI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Disadvantages of this process: complex process, high requirements for equipment, harsh reaction conditions, high energy consumption, and pollution to the environment
This process is also synthesized by liquid phase method, but it needs to add precipitant, suction filtration, washing and other processes, and it cannot realize the conversion of all raw materials into products, which is easy to cause environmental pollution

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0039] A preparation method of barium metaborate nano powder, the steps are:

[0040] A. Weigh barium hydroxide and boric acid with a molar ratio of 1:2, mix them evenly at room temperature, grind until they change from solid to wet, then from wet to viscous, and then continue to grind for 1 hour;

[0041] B, the product obtained in the last step is dried under air atmosphere and room temperature to obtain the product Ba[B(OH) 4 ] 2 , its X-ray diffraction pattern is as figure 1As shown, it is compared with the JCPDS standard card, showing that its crystal form is consistent with the JCPDS standard card 48-0941.

Embodiment 2

[0043] A preparation method of barium metaborate nano powder, the steps are:

[0044] A. Weigh barium hydroxide and boric acid with a molar ratio of 1:2, mix them evenly at room temperature, grind them until they change from solid to wet, then from wet to viscous, and then continue to grind for 1.5 hours ;

[0045] B. Put the product obtained in the previous step into a drying oven, and dry it in an air atmosphere at 40-60°C to obtain the product Ba[B(OH) 4 ] 2 , its X-ray diffraction pattern is as figure 1 As shown, it is compared with the JCPDS standard card, showing that its crystal form is consistent with the JCPDS standard card 48-0941.

Embodiment 3

[0047] A preparation method of barium metaborate nano powder, the steps are:

[0048] A. Weigh barium hydroxide and boric acid with a molar ratio of 1:2, mix them evenly at room temperature, grind until they change from solid to wet, then from wet to viscous, and then continue to grind for 1 hour;

[0049] B. Put the product obtained in the previous step into a drying oven, and dry it in an air atmosphere at 100°C to obtain the product BaB 2 o 4 , its X-ray diffraction pattern is as figure 2 As shown, it is compared with the JCPDS standard card, showing that its crystal form is consistent with the JCPDS standard card 35-0181.

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Abstract

The invention discloses a preparation method of barium metaborate nano-powder. The preparation method comprises the following steps of: A, weighing barium hydroxide and boric acid in a molar ratio of 1:2, uniformly mixing the barium hydroxide and the boric acid at room temperature, grinding the mixture from a solid state to a wet state and then from the wet state to a viscous state, and then continuously grinding the mixture for 1 to 1.5 hours; and B, baking and / or air-drying and / or roasting a product obtained in the step A to obtain low-temperature phase barium metaborate nano-powder with different crystalline state. In the preparation method, a low-temperature solid-state reaction method is adopted, the barium hydroxide and the boric acid are taken as raw materials, barium metaborate is prepared by grinding and one-step reaction; without solvent, surfactant, precipitating agent or operation steps such as suction filtration, vacuum drying, centrifugal separation and the like, complete conversion of the raw materials into products is directly realized, and the method has low energy consumption and low cost, is environment-free, and accords with requirements of green chemistry.

Description

technical field [0001] The invention relates to the field of fine chemical industry, in particular to a preparation process of barium metaborate nanopowder. Background technique [0002] Barium metaborate is a white functional pigment, which has anti-rust, anti-mildew, anti-pollution, anti-powdering, anti-discoloration, flame-retardant and other functions in coatings. It is a multi-functional non-toxic anti-rust pigment. Used in the manufacture of primers, topcoats and antirust coatings. Barium metaborate can also be used in industries such as ceramics, paper making, rubber and plastics. Barium metaborate exists high temperature phase (α-BaB 2 o 4 ) and the low-temperature phase (β-BaB 2 o 4 ) Two polytypes. Low temperature phase barium metaborate single crystal (β-BaB 2 o 4 ) is a nonlinear optical crystal with comprehensive and excellent performance, with a wide light transmission band (190nm~3500nm) and phase matching range (409.6nm~3500nm), large nonlinear optica...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B35/12
CPCY02P20/10
Inventor 丁士文蔡巧芬
Owner HEBEI UNIVERSITY
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