A kind of preparation method of stannous sulfide

Abstract

The invention discloses a preparation method of stannous sulfide. The preparation method comprises the following steps: uniformly mixing metallic tin powder with sublimate powdered sulfur, adding mixed powder into an atmosphere reaction furnace with the temperature of 650 DEG C-1000 DEG C and performing a quick reaction on tin and sulfur to obtain liquid tin sulfide; controlling the furnace temperature at 650 DEG C-1000 DEG C, continuously preserving the temperature for 0.5-4h, distilling to remove redundant sulfur in the tin sulfide product and cooling to obtain the high-purity stannous sulfide. The method is simple in process, low in cost, high in synthesis speed of the product, high in product yield and high in purity; less waste residues and waste gas are generated, and the productionprocess is green and environmentally-friendly, therefore, the method has a relatively good industrial application prospect.

Description

technical field [0001] The invention relates to a preparation method of stannous sulfide, and belongs to the field of new material preparation. Background technique [0002] Stannous sulfide is an important multifunctional material with the advantages of safety and non-toxicity, and is used for various purposes. Antimony sulfide in automobile friction materials can reduce the decomposition rate of organic binders, maintain stable friction performance, and reduce noise and vibration during friction braking. It is a solid lubricant with excellent performance, but antimony has a carcinogenic effect. Many countries have begun to restrict or prohibit the use of stannous sulfide, which is safe and non-toxic, and is used as a substitute for antimony sulfide. Stannous sulfide is used in the light absorption layer of solar cells. Because of its direct band gap of 1.2ev~1.52ev and indirect bandgap of 1.0ev~1.1ev, it has high photoelectric conversion efficiency for sunlight, which is ...

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Problems solved by technology

[0003] Tin sulfide products can be synthesized by various methods. For example, patent application 201710802843.7 discloses a method, which uses tin-containing materials and sulfur for sulfide reaction to convert them into sulfide, and then vacuum distillation to remove impurities to obtain high-purity sulfide Tin; the method of patent application 201210404428.3 is to first react tin with concentrated hydrochloric acid and then react with sodium sulfide to prepare stannous sulfide. Soluble stannous salt is prepared into a solution, hydrochloric acid is added dropwise to sulfur salt to generate hydrogen sulfide gas, and the generated gas is introduced into the stannous salt solution to react to synthesize stannous sulfide, which is then washed to remove impurities, dried and purified to obtain a purity of 95.77%~99.54 % stannous sulfide products; the existing part of the dry process to prepare stannous sulfide raw materials has strong adaptability, and the resulting product has high purity, but the equipment requirements are high and the investment is large; the wet process is easy to introduce other impurity ions in the preparation process , it is difficult to wash and remove, which affects the purity of the product. Some wet processes involve toxic gases, and there is a certain risk in personnel operation, and there is a common problem of waste liquid treatment in the later stage of wet preparation of stannous sulfide.

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