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A kind of preparation technology of spherical chromium oxide composite agglomeration powder and its prepared product

A preparation process, chromium oxide technology, applied in the direction of chromium oxide/hydrate, coating, etc., can solve the problems of uneven distribution of chemical components, affecting the comprehensive performance of chromium oxide coating, segregation of chromium oxide coating, etc., to achieve Guaranteed sphericity and compactness, good compactness, and the effect of inhibiting valence changes

Active Publication Date: 2021-06-15
BEIJING MINING & METALLURGICAL TECH GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the distribution of chemical components in the chromium oxide powder prepared by this process is not uniform. When the chromium oxide powder is used for spray coating, the obtained chromium oxide coating will be partially segregated, which will affect the comprehensiveness of the chromium oxide coating. performance

Method used

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  • A kind of preparation technology of spherical chromium oxide composite agglomeration powder and its prepared product
  • A kind of preparation technology of spherical chromium oxide composite agglomeration powder and its prepared product
  • A kind of preparation technology of spherical chromium oxide composite agglomeration powder and its prepared product

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] A preparation process of spherical chromium oxide composite agglomerated powder comprises the following steps:

[0045] (1), Dissolve chromium nitrate in deionized water, then add SiO in the solution 2 Nano powder and TiO 2 Nano powder (wherein, the concentration of chromium nitrate solution is 2mol / L, SiO 2 、TiO 2 The mass ratio of chromium nitrate and chromium nitrate is 4.5:3:289.7), ultrasonic treatment, to obtain a mixed solution; add ammonia water drop by drop to the mixed solution, adjust the pH value of the solution to 9, and obtain SiO 2 Nano powder and TiO 2 Nano-powder is the coated precursor of the core, filtered and dried to obtain a solid product;

[0046] (2), the solid product prepared in step (1) and the polystyrene accounting for 15% of the solid product weight are formulated with deionized water into a slurry with a solid content of 55%, and the configured slurry is sprayed into granulation Tower, through spray granulation combined with atmospher...

Embodiment 2

[0048] The difference between embodiment 2 and embodiment 1 is: in embodiment 2, the concentration of chromium nitrate solution is 1mol / L, SiO 2 、TiO 2 The mass ratio of chromium nitrate and chromium nitrate is 3:4:285, the pH value is adjusted to 8 after adding ammonia water dropwise, the solid content of the slurry is 50%, and the rest are consistent with Example 1.

Embodiment 3

[0050] The difference between embodiment 3 and embodiment 1 is: in embodiment 3, the concentration of chromium nitrate solution is 3mol / L, SiO 2 、TiO 2 The mass ratio to chromium nitrate is 5:2:297.5, the pH value is adjusted to 11 after adding ammonia water dropwise, the solid content of the slurry is 60%, and the rest are consistent with Example 1.

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Abstract

The invention discloses a preparation process of a spherical chromium oxide composite agglomeration powder and a product thereof, belonging to the technical field of composite powder materials. The preparation process comprises the following steps: dissolving chromium nitrate in deionized water, adding SiO 2 Nano powder and TiO 2 Nano powder, then add ammonia water drop by drop, adjust the pH value of the solution, and make SiO 2 Nano powder and TiO 2 Nano powder is the coated precursor of the core, filtered and dried to obtain a solid product; the solid product is prepared into a slurry with deionized water, and the spherical agglomerated powder is obtained by spray granulation combined with the atmosphere protection sintering process, and then the Spherical agglomerated powders can be graded to obtain spherical chromium oxide composite agglomerated powders; this preparation process can produce chromium oxide composite agglomerated powders with uniform chemical composition, good sphericity, compactness and fluidity.

Description

technical field [0001] The invention relates to the technical field of composite powder materials, more specifically, it relates to a preparation process of spherical chromium oxide composite agglomerated powder and a product thereof. Background technique [0002] The chromium oxide composite powder material formed by adding an appropriate amount of silicon oxide and titanium oxide to the chromium oxide powder can improve the heating and melting characteristics of the chromium oxide powder during the spraying process, improve the process performance of the chromium oxide powder spraying, and improve the powder deposition efficiency and compatibility with the substrate. It is beneficial to improve the fracture toughness and post-processing performance of the chromium oxide coating. The chromium oxide composite powder material also has the characteristics of low friction coefficient, high thermal conductivity, and high hardness. It also has good chemical stability and excellen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D1/00C01G37/02
CPCC01G37/02C01P2004/03C01P2004/32C09D1/00
Inventor 贾芳冀晓鹃彭浩然沈婕张鑫卢晓亮原慷李杰
Owner BEIJING MINING & METALLURGICAL TECH GRP CO LTD
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