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Dispersing method for ZrB2 nanopowder

A powder and nano technology, applied in the field of dispersion of nano ZrB2 powder, can solve the problem of easy agglomeration of nano ZrB2 powder, and achieve the effect of not easy to agglomerate, uniform dispersion and good dispersion effect.

Inactive Publication Date: 2015-03-25
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 nano ZrB2 powder is easy to agglomerate in water, and provides a method for dispersing nano ZrB2 powder

Method used

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specific Embodiment approach 1

[0017] Specific embodiment one: present embodiment disperses nanometer ZrB The method for powder, carry out according to the following steps:

[0018] 1. Titrate deionized water with acid to obtain a solvent with a pH of 3;

[0019] 2. Weigh the ZrB2 powder and the dispersant, add the ZrB2 powder and the dispersant 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 powder.

specific Embodiment approach 2

[0020] Embodiment 2: This embodiment is different from Embodiment 1 in that the acid in step 1 is lactic acid. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0021] Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that: in step 2, the particle size of the ZrB2 powder is 50-100 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 dispersing method for ZrB2 nanopowder and aims at solving the problem that the ZrB2 nanopowder is easily agglomerated in water. The dispersing method comprises the steps of firstly, titrating deionized water by using acid or alkaline to obtain a solvent with the pH value of 3 or 11; and secondly, weighing ZrB2 powder and a dispersing agent, sequentially adding the ZrB2 powder and the dispersing agent into the solvent, and carrying out ultrasonic treatment for 14-16 minutes to obtain uniformly-dispersed slurry, namely finishing the dispersion of the ZrB2 nanopowder. By using the dispersing method disclosed by the invention, the dispersing effect is good, the ZrB2 nanopowder can be uniformly dispersed, and the slurry cannot be remarkably settled within 24 hours. The agglomeration size of the ZrB2 nanopowder is relatively small, the agglomeration size of the ZrB2 powder is smaller than 300nm, and the Zeta potential is about 40mv. The dispersing method is applied to the field of nanomaterials.

Description

technical field [0001] The invention relates to a dispersion method of nanometer ZrB2 powder. Background technique [0002] Due to its grain size on the nanometer scale, some properties of nanomaterials have special advantages that are different from traditional materials, such as high mechanical properties, high hardness, superplasticity, and special properties in acousto-optic-thermomagnetism. Due to its high temperature resistance, oxidation resistance and ablation resistance, ZrB2 is considered to be the best candidate material for extreme chemical and thermal environments related to hypersonic flight, atmospheric reentry and rocket propulsion. The preparation of ceramic materials by gel injection has the advantages that complex structural parts can be prepared and the green body is easy to machine. The preparation of nano-ZrB2 by gel injection molding has become a new preparation method. When preparing nano ZrB2-SiC material by gel injection molding, due to the relati...

Claims

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Application Information

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IPC IPC(8): B01F3/12B01F11/02
Inventor 程业红张幸红韩文波胡平洪长青安家东王鹏赵广东
Owner HARBIN INST OF TECH
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