Method for Synthesizing Silicon Nitride by Rotary Kiln Method

Abstract

The invention discloses a method for synthesizing silicon nitride by a rotary kiln process. The method comprises the steps: spraying siliceous powder from a solid powder charging opening in a rotary kiln main body; introducing nitrogen gas from a nitrogen gas inlet in the rotary kiln main body; and subjecting the nitrogen gas and the siliceous powder to a self-propagation reaction in the rotary kiln main body, thereby producing the silicon nitride. According to the method for synthesizing the silicon nitride by the rotary kiln process, disclosed by the invention, the mass continuous synthesisof the silicon nitride can be achieved.

Description

technical field

[0001] The invention relates to the field of nitride synthesis, and further relates to a method for synthesizing silicon nitride by a rotary kiln method. Background technique

[0002] Nitride, especially silicon nitride, is widely used in industry. 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] As a nitrogen compound synthesis reactor, the rotary kiln is under a slightly positive pressure state, the reactants are continuously charged into the f...

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