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Preparation method of hafnium boride powder

A technology of hafnium boride and powder, which is applied in the field of preparation of hafnium boride powder, can solve the problems of hafnium boride purity not reaching the standard, loss of powder materials, and poor screening process, so as to prevent the loss of raw materials and improve The degree of detail and the effect of improving purity

Pending Publication Date: 2021-12-21
北京华威锐科化工有限公司
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  • Abstract
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  • Application Information

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Problems solved by technology

However, powdery materials are easily lost during processing, and the screening process is poor, so that the purity of the prepared hafnium boride cannot meet the standard

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  • Preparation method of hafnium boride powder
  • Preparation method of hafnium boride powder
  • Preparation method of hafnium boride powder

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Embodiment Construction

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0032] Reference herein to an "embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application. The occurrences of this phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is understood explicitly and...

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Abstract

The invention relates to a preparation method of hafnium boride powder, which comprises the following steps: sequentially mixing hafnium oxide, boron carbide and carbon black as raw materials, and conducting primary grinding, primary drying, vacuum synthesis, crushing, primary sieving, secondary drying and secondary sieving, thereby obtaining the hafnium boride powder with high purity and ultrafine granularity. The invention discloses two drying processes and two sieving processes, in the primary drying process, the product is dried into blocks after being mixed and ground, so that raw material loss caused by vacuumizing is prevented, in the secondary sieving process, the ball milling time of the synthesized powder is adjusted according to the required particle size condition, so that products with different particle sizes are produced, and the fineness of the granularity is also ensured. According to the method, the purity of the prepared hafnium boride powder can be improved, and the fineness of the granularity of the prepared hafnium boride powder can also be improved.

Description

technical field [0001] The invention relates to the technical field of hafnium boride preparation, in particular to a preparation method of hafnium boride powder. Background technique [0002] Hafnium boride (HfB 2 ) has a series of unique and excellent properties such as high melting point (3250°C), high hardness (39GPa), high conductivity (15Ω·cm), low oxidation rate and high chemical stability. The key raw materials of thermal protection structural materials that can still maintain chemical and physical stability under high temperature and aerobic environment can be widely used in industries such as engines, advanced aircraft, plasma discharge bodies, cutting tools, furnace components, etc., so it has attracted many in recent years focus on. Purity and particle size are key factors affecting hafnium boride applications. [0003] In the prior art, in the process of preparing finished products, the raw materials are all processed by grinding to form powdery materials, an...

Claims

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Application Information

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IPC IPC(8): C01B35/04
CPCC01B35/04
Inventor 张吉磊
Owner 北京华威锐科化工有限公司
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