Submicron-order boron carbide powder and preparation method and application thereof

Abstract

The invention discloses submicron-order boron carbide powder and a synthesis method and application thereof. Production efficiency is improved, the production cost is reduced, and high purity and fine granularity are achieved. The purity of boron carbide ranges from 98.5% to 99.4%, the mean grain diameter ranges from 0.4 micrometer to 5 micrometers, and boron carbide accounts for 90% or above. The method for preparing the submicron-order boron carbide powder includes the steps that raw materials are prepared and preliminarily mixed; a grinding medium is added, and the materials are mixed to be uniform; the raw materials and the grinding medium are separated; green bodies are formed after pressing; the green bodies enter a reaction device for a self-spread synthesis reaction; reaction products are crushed; grinding and separating are carried out; acid pickling and purifying are carried out; the materials are filtered, washed and dried; airflow crushing is carried out. The boron carbide powder synthesized through the method can be applied to a nuclear reactor and used for a neutron absorption material and a radiation protection material; the submicron-order boron carbide powder can be prepared into an armor material after high-temperature and high-pressure sintering and can be used as a grinding material and an abrasive for fine advanced grinding.

Description

technical field [0001] The invention discloses a compound and its preparation method and application, in particular, it relates to a method of improving production efficiency, reducing production cost and preparing submicron boron carbide powder with high purity and fine particle size, and its preparation method and application . Background technique [0002] At present, the preparation methods of boron carbide powder mentioned in scientific research literature include electric arc furnace carbothermal reduction method, carbon tube furnace carbothermal reduction method, intermediate frequency induction furnace carbothermal reduction method, Sol-Gel method, vapor deposition method and magnesia thermal reduction method. Methods, etc., the purity and particle size of the materials prepared by these different methods vary. At present, the only domestic technical route that can realize the industrial production of boron carbide is the carbothermal reduction method, among which t...

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Problems solved by technology

At present, the Sol-Gel method and vapor deposition method can synthesize nano-sized boron carbide powder, but the cost is high, the production efficiency is low, and there is still a long way to go before industrialization

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