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A kind of flaky porous nickel boride powder and its preparation method

A technology of nickel boride and powder, which is applied in the field of preparation of nickel boride powder, which can solve the problems of long time consumption and non-special shape of crystalline Ni-B powder

Active Publication Date: 2018-08-21
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ball milling metallic nickel and simple B can also prepare crystalline Ni-B powder, but it takes a long time and is easy to introduce impurity phases
In addition, crystalline Ni-B powders prepared by traditional methods generally do not have special morphology

Method used

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  • A kind of flaky porous nickel boride powder and its preparation method
  • A kind of flaky porous nickel boride powder and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Mix micron-sized metal nickel powder and amorphous boron powder (molar ratio 1:2) with 10 times the mass of sodium chloride / potassium chloride (molar ratio 1:1) powder 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 NiB powder.

[0020] figure 1 From the XRD spectrum of the NiB powder prepared in this example, it can be seen that the powder prepared in this example is crystalline NiB without other crystalline phase impurities. figure 2 From the SEM photo of the NiB 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

[0022] Mix micron-sized metal nickel powder and amorphous boron powder (molar ratio 1:1.5) 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 1 h, filtered, washed with water and ethanol for several times, and dried to obtain flaky porous NiB powder.

Embodiment 3

[0024] Mix micron-sized metal nickel 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 NiB powder.

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Abstract

The invention discloses flaky porous nickel boride powder and a preparation method thereof and belongs to the technical field of inorganic powder preparation. The powder is crystalline-state NiB and is composed of nanosheets with the average thickness of 20 nm and the plane view size of 200-300 nm. The nanosheets are connected in a staggered mode to form an open porous structure. The powder is prepared through the steps that micron-order metallic nickel powder, amorphous boron powder and alkali chloride powder are mixed; the mixed powder is put in a corundum crucible and heated to 1,000 DEG C or above under argon protection, and natural cooling is carried out after heat preservation is carried out for 0.5-2 h; the obtained product is soaked with water for 1-3 h, filtered, washed multiple times with water and ethyl alcohol respectively and dried, and the flaky porous NiB powder is obtained. The obtained nickel boride powder is in a crystalline state, has a flaky porous structure, can serve as a catalyst carrier material and also is a potential inorganic functional material.

Description

technical field [0001] The invention belongs to the technical field of inorganic powder preparation, in particular to a preparation method of nickel boride (NiB) powder, in particular to a preparation method of nickel boride powder with sheet-like porous morphology. Background technique [0002] Due to its high mechanical hardness, strong corrosion resistance and good electromagnetic and catalytic properties, Ni-B has a wide range of applications in superhard anti-corrosion coatings, electronic functional materials and catalysis. At present, amorphous Ni-B powder is generally prepared by reducing nickel-containing precursors with borohydride, and crystalline Ni-B powder can be obtained after heat treatment. Since the Ni-B system contains NiB 12 , NiB, Ni 2 B, Ni 3 B, Ni 4 B 3 and other crystalline phases, the crystalline Ni-B powders synthesized by the above method are mostly composite phases. Ball milling metallic nickel and simple B can also prepare crystalline Ni-B ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B35/04
CPCC01B35/04C01P2002/72C01P2004/03C01P2004/20C01P2004/62
Inventor 冉松林魏雅男
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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