Sheet-like porous CoB powder and preparation method thereof

A powder and flake technology, which is applied in the field of CoB powder preparation, can solve the problems of inability to prepare powder with special morphology and difficulty in controlling the reaction process.

Active Publication Date: 2017-01-04
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The CoB powder prepared by the self-propagating combustion method is crystalline, the size is micron, and the reaction process is difficult to control, so it is impossible to prepare powder with special morphology

Method used

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  • Sheet-like porous CoB powder and preparation method thereof
  • Sheet-like porous CoB powder and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0020] Mix micron-sized metal cobalt powder and amorphous boron powder (molar ratio 1:2) with 10 times the mass of sodium chloride / potassium chloride powder (molar ratio 1:1) and put them into a corundum crucible. Heating to 1000°C under the protection of argon, keeping it warm for 1h, cooling naturally, then soaking the product in water for 1h, filtering, washing with water and ethanol for several times, and drying to obtain flaky porous CoB powder.

[0021] figure 1 From the XRD spectrum of the CoB powder prepared in this example, it can be seen that the powder prepared in this example is crystalline CoB. figure 2 From the SEM photo of the CoB powder prepared for this example, it can be seen that the powder is composed of many nanosheets with a thickness of about 20nm and a planar size of about 200-300nm, and these nanosheets are interconnected to form an open porous structure.

Embodiment 2

[0023] Mix micron-sized metallic cobalt powder and amorphous boron powder (molar ratio 1:1.5) with 5 times the mass of sodium chloride powder and put them into a corundum crucible, heat to 1000°C under the protection of argon, and keep it warm for 1h After cooling naturally, the product was soaked in water for 1 h, filtered, washed with water and ethanol for several times, and dried to obtain a flaky porous CoB powder.

Embodiment 3

[0025] Mix micron-sized metal cobalt powder and amorphous boron powder (molar ratio 1:1.2) with 5 times the mass of sodium chloride powder and put it into a corundum crucible, heat it to 1100°C under the protection of argon, and keep it warm for 1h After cooling naturally, the product was soaked in water for 2 hours, filtered, washed with water and ethanol for several times, and dried to obtain flaky porous CoB powder.

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Abstract

The invention discloses sheet-like porous CoB powder and a preparation method thereof and belongs to the technical field of inorganic powder preparation. The powder is CoB in a crystalline state and consists of nanosheets with the average thickness being 20 nm and the plane size being 200-300 nm, and the nanosheets are connected in a staggered manner to form an open porous structure. The preparation method of the powder comprises specific preparation steps as follows: micron-order metal cobalt powder, amorphous boron powder and alkali metal chloride powder are mixed; the mixed powder is placed in an corundum crucible, heated to 800 DEG C or above under the protection of argon, kept at the temperature for 0.5-2 h and then cooled naturally; an obtained product is soaked in water, filtered, cleaned and dried, and the sheet-like porous CoB powder is obtained. The obtained CoB powder is in the crystalline state, adopts the sheet-like porous structure, can be used as a catalyst carrier material and is a potential inorganic functional material.

Description

technical field [0001] The invention belongs to the technical field of inorganic powder preparation, and in particular relates to a method for preparing CoB powder, in particular to a method for preparing CoB powder with sheet-like porous morphology. Background technique [0002] Due to its high mechanical hardness, strong corrosion resistance and good electromagnetic and catalytic properties, CoB has a wide range of applications in superhard anti-corrosion coatings, electronic functional materials and catalysis. At present, there are two main methods for preparing CoB powder: wet chemical method and self-propagating combustion method. The CoB powder prepared by the wet chemical method is amorphous, the size is generally nanoscale, and it is usually loaded on a porous carrier and used as a catalyst. The CoB powder prepared by the self-propagating combustion method is crystalline, the size is micron, and the reaction process is difficult to control, so it is impossible to pr...

Claims

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Application Information

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IPC IPC(8): C01B35/04
CPCC01B35/04C01P2002/72C01P2004/03
Inventor 冉松林魏雅男
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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