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Method for dispersing nanometer ZrB2-SiC composite powder

A composite powder, zrb2-sic technology, applied in boron/boride, metal boride and other directions, can solve problems such as easy agglomeration, and achieve uniform dispersion and good dispersion effect.

Inactive Publication Date: 2015-08-19
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The present invention aims to solve the problem that existing nano ZrB2-SiC composite powders are easy to agglomerate in water, and provides a method for dispersing nano ZrB2-SiC composite powders

Method used

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  • Method for dispersing nanometer ZrB2-SiC composite powder
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  • Method for dispersing nanometer ZrB2-SiC composite powder

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specific Embodiment approach 1

[0013] Specific embodiment one: the method for dispersing nanometer ZrB2-SiC composite powder in this embodiment is carried out according to the following steps:

[0014] 1. Titrate deionized water with alkali to obtain a solvent with a pH of 11;

[0015] 2. Weigh the ZrB2-SiC composite powder and dispersant, add them to the solvent successively, and ultrasonicate for 14-16 minutes to obtain a uniformly dispersed slurry, that is, complete the dispersion of the nano-ZrB2-SiC composite powder.

specific Embodiment approach 2

[0016] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the alkali in step 1 is ammonia water. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0017] Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that: in step 2, the average particle size of the ZrB2-SiC composite powder is 80 nm, and the purity is greater than 99%. Others are the same as in the first or second embodiment.

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Abstract

The invention relates to a method for dispersing nanometer composite powder, and concretely relates to a method for dispersing nanometer ZrB2-SiC composite powder. A problem of easy agglomeration of present nanometer ZrB2-SiC composite powders in water is solved. The method comprises the following steps: 1, titrating deionized water by using an alkali to obtain a solvent with the pH value of 11; and 2, weighing ZrB2-SiC composite powder and a dispersant, adding the ZrB2-SiC composite powder and the dispersant into the solvent, and carrying out ultrasonic treatment for 14-16min to obtain a uniformly dispersed slurry in order to complete dispersion of the nanometer ZrB2-SiC composite powder. The method has the advantages of good dispersion effect, uniform dispersion, and no obvious coagulation within 24h, and can be used for dispersing the nanometer ZrB2-SiC composite powder.

Description

technical field [0001] The invention relates to a method for dispersing nanocomposite powder. Background technique [0002] Nanomaterials are quite different from macroscopic materials because their grain size is in the nanometer range, that is, 1 to 100 nanometers. Some of their properties have special advantages different from traditional materials, such as high mechanical properties, high hardness, superplasticity, And special performance in the aspect of sound, light, heat and magnetism. Both ZrB2 and SiC have high temperature resistance, oxidation resistance and ablation resistance, and are considered to be one of the best candidate materials for extreme chemical and thermal environments related to hypersonic flight, atmospheric reentry and rocket propulsion. The preparation of ceramic materials by gel injection molding has the advantages that complex structural parts can be prepared and the green body is easy to machine. The preparation of nanomaterials by gel inject...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B35/04C01B31/36
Inventor 安加东张幸红韩文波程业红刘大钊洪长青胡平
Owner HARBIN INST OF TECH
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