Synthesis method and application of silicon sulfide

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 sublimates 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 exposed to moisture. It burns when heated in the 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 polymerized, 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 is prone to decomposition to release hydrogen sulfide. In liquid ammonia, it is reported to form imide Si(NH)2 and NH4SH, but recent reports have identified the crystal (NH4)2 [SIS3(NH3)]·2NH3 as a tetrahedral orthosilicate anion SIS3( NH3) product).

Synthesis of tetraethyl orthosilicate and H2S by reaction with ethanol. Carry out alcoholysis with a large amount of text-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 produce sulfosilicate. If you want to buy silicon sulfide SiS2 powder in bulk, please feel free to send an inquiry to get the latest price.

How is silicon sulfide SiS2 powder produced?

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 into the shingle, then put the shingle into the 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. When purifying, sublimation in nitrogen or vacuum. The mixture of silicon and sulfur is heated at 5×103MPa and 700°C 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 ethyl sulfate (C2H5-S2-C2H5, C2H5-S3-C2H5). After the latter is dissolved in benzene, it is filtered under conditions that prevent the mixing of moisture.

Application of silicon sulfide SiS2 powder

Silicon sulfide is an acid-soluble source of medium water and used for compatibility with sulfates of silicon. Sulfates are sulfates or esters formed by replacing one or two hydrogens with metals. Widely used as potting and molding materials. After various electronic and electrical components are coated and potted with room temperature vulcanized silicone rubber, they are widely used for sealing in the automobile and machinery industries, shock-resistant materials, rubber roller materials in the textile, plastic, and printing industries, and caulking and sealing materials in the construction industry. . At the same time, it can be used to make soft molds and molds for casting epoxy resin, polyester resin, polystyrene, polyurethane, vinyl plastic, paraffin wax, low melting point alloy, etc. In addition, the simulation performance of two-component room temperature vulcanized silicone rubber can replicate various exquisite patterns on cultural relics.

The price of silicon sulfide SiS2 powder

The price of silicon sulfide SiS2 will vary randomly with production costs, transportation costs, international conditions, exchange rates, and the market supply and demand of silicon sulfide SiS2. Tanki New Materials Co.,Ltd aims to help all 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 prices.

Supplier of silicon sulfide SiS2 powder

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, and structural devices, and provides OEM services.