Sedimentation type self-propagation reactor for compound containing silicon and nitride

Abstract

The invention discloses a sedimentation type self-propagation reactor for a compound containing silicon and nitride. The reactor comprises a furnace body, a solid material inlet, a gas inlet and a material outlet; the solid material inlet is arranged in the upper portion of the furnace body to guide a silicon-containing solid material to enter into the furnace body, a pulse pneumatic component isarranged on the solid material inlet, and the silicon-containing solid material is pushed into the furnace body by a pulse pneumatic method; the gas inlet is arranged in the side of the furnace body,and is configured to form a self-propagation reaction with the silicon-containing solid material in the furnace body after a nitrogen gas is introduced, wherein the reaction zone is corresponding to areaction zone in the furnace body; and the material outlet is arranged in the bottom of the furnace body, and is configured to output the compound containing the silicon and the nitride after the self-propagation reaction. The self-propagation reaction is carried out in the reactor provided by the invention, a heating member is not needed to be arranged to heat the furnace body, so that energy sources can be saved.

Description

technical field [0001] The invention relates to the field of nitride preparation, and further relates to a sinking type self-propagating silicon nitride reactor. Background technique [0002] Silicon nitrides (compounds containing silicon and nitrogen) are widely used in industry as ceramics. For example, silicon nitride, which has many excellent properties, such as wear resistance, self-lubrication, high temperature and oxidation resistance, etc., can be used to prepare high temperature resistant parts, heat transfer parts, wear resistant materials and so on. [0003] Self-propagating technology is a way to synthesize materials by exothermic chemical reaction itself. Since the reaction can be continued through the exothermic chemical reaction itself, and the reaction can continue without an external heat source, it is favored by the industry. [0004] The sinking reactor (sinking furnace) is a kind of reactor, which allows the powdery material to complete a partial reactio...

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Problems solved by technology

[0005] The silicon nitride preparation reactors in the prior art are mainly closed reactors, some of which need to be carried out in a high-pressure state, which consumes energy and is unsafe; some require heating reactions, which also cause energy consumption; and the existing reactor preparation The output and purity are not high, and the improvement of the overall equipment is urgently needed to increase the output and reduce energy consumption

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