Synthesis method of silicon sulfide SiS2 powder

1. Put aluminum powder and excess sulfur into a crucible and burn to obtain aluminum sulfide. The aluminum sulfide is crushed and mixed with a slight excess of silica sand. Put the mixture in a crockpot, then put the crockpot in a quartz tube, and heat it while passing a small amount of dry nitrogen into the quartz tube. The reaction starts at 1100°C, and at 1200 to 1300°C, the sublimated SiS2 adheres to the low temperature area of the tube. During purification, sublimation is carried out in nitrogen or vacuum. The mixture of silicon and sulfur is heated at 5×103MPa and 700℃ to obtain tetragonal SiS2.

2. Heating to decompose hydrocarbon sulfide-based silicon, generating silicon disulfide and sulfide at 250-300°C. If sulfur is added, it will decompose at a lower temperature. Mix 96g of sulfur and 39g of Si(SC2H5)4 together and heat at 200°C for 10min to generate silicon disulfide and ethylsulfane (C2H5-S2-C2H5, C2H5-S3-C2H5). After the latter is dissolved in benzene, it is filtered under conditions that prevent mixing of moisture.

Overview of silicon sulfide SiS2 powder

Silicon sulfide is an inorganic compound with the molecular formula SiS2. White fibrous orthorhombic or tetragonal crystals. The relative density is 2.02, the melting point is 1090°C, and it is sublimated in nitrogen at 1250°C. Insoluble in benzene; soluble in dilute alkali. It is stable under normal temperature and pressure, and decomposes into SiO2 and H2S when wet. It will burn when heated in air.

Water, ethanol and liquid ammonia are used for hydrolysis and ammonolysis, respectively. Reacts with alkali metal sulfides to form thiosilicates. Like silica, this material is also polymeric, but the one-dimensional structure it uses is different from the usual silica form.

Like other silicon disulfide compounds (such as bis(trimethylsilyl) sulfide), SiS2 easily decomposes to release hydrogen sulfide. According to reports, imides Si(NH)2 and NH4SH are formed in liquid ammonia, but recent reports have identified the crystal (NH4)2 [SIS3(NH3)]·2NH3 as the tetrahedral orthosilicate anion SIS3( NH3) product).

It reacts with ethanol to synthesize tetraethyl orthosilicate and hydrogen sulfide. Carry out alcoholysis with a large amount of butanol to obtain tri(tert-butyl)silicon mercaptan:

3(CH3)3COH + Sis2→[(CH3)3CO] 3Sish + H2S

It reacts with sodium sulfide, magnesium sulfide and aluminum sulfide to form thiosilicate.

Application of silicon sulfide SiS2 powder

Silicon sulfide SiS2 powder is an acid-soluble source of reclaimed water for compatibility with silicon sulfate. Sulfates are sulfates or esters formed by replacing one or two hydrogens with metals. Widely used as potting and molding materials. Various electronic and electrical components are often coated and potted with warm vulcanized silicone rubber, and are widely used for sealing in the automotive and machinery industries, seismic materials in the textile, plastic, and printing industries, rubber roller materials, caulking and sealing materials in the construction industry. .At the same time, it can be used to make soft molds and molds such as epoxy resin, polyester resin, polystyrene, polyurethane, vinyl plastic, paraffin wax, and low melting point alloy.

Silicon sulfide SiS2 powder price

The price of silicon sulfide SiS2 will vary randomly with factors such as production costs, transportation costs, international conditions, exchange rates, and market supply and demand of silicon sulfide SiS2. Tanki New Materials Co., Ltd. aims to help various industries and chemical wholesalers find high-quality, low-cost nanomaterials and chemicals by providing a full set of customized services. If you are looking for silicon sulfide SiS2, please feel free to send to get the latest silicon sulfide SiS2 price.

Silicon sulfide SiS2 powder supplier

As a global supplier of silicon sulfide SiS2 powder, Tanki New Materials Co., Ltd. has extensive experience in the performance, application and cost-effective manufacturing of advanced technology and engineering materials. The company has successfully developed a series of powder materials (including oxides, carbides, nitrides, single metals, etc.), high-purity targets, functional ceramics, structural devices, and provides OEM services.