Silicon Sulfide SiS2 Powder CAS 13759-10-9

Product Name: Silicon Sulfide; silicon sulphide
Silicon Sulfide chemical formula: SiS2
Silicon Sulfide molecular weight: 92.21
Silicon Sulfide density: 1.853 g/cm3
Silicon Sulfide melting point: 1090℃
Silicon Sulfide boiling point: 1130 ℃
Silicon Sulfide CAS NO. : 13759-10-9
Silicon Sulfide Information:
Silicon sulfide, the molecular formula is SiS2. White fibrous orthorhombic or tetragonal crystals are stable at normal temperature and pressure and decomposed into SiO2 and H2S in the presence of moisture. It burns when heated in the air. 

About Silicon Sulfide SiS2 Powder:
Silicon sulfide is an inorganic compound with the molecular formula SiS2. SiS2 = 92.21, colorless acicular crystal.The relative density is 2.02, the melting point is 1090℃, and it sublimates in nitrogen at 1250℃. Insoluble in benzene; Soluble in dilute base. Hydrolysis and ammonolysis occurred with water, ethanol and liquid ammonia, respectively. Reaction with alkali metal sulfides to form thiosilicates.Like silicon dioxide, the material is polymerized, but it uses a one-dimensional structure that is distinct from the usual silicon dioxide form.
Like other silicosulfide compounds, such as bis (trimethylsilyl) sulfides, SiS2 is easy to decompose to release hydrogen sulfide. In liquid ammonia, it has been reported to form imide Si(NH)2 and NH4SH, but recent reports have identified the crystallization (NH4)2[SIS3 (NH3)]·2NH3 as a product containing the tetrahedral orthosilicate anion, SIS3 (NH3).
Tetraethyl orthosilicate and H2S were synthesized by reaction with ethanol. With a large volume of tert-butyl alcohol, alcoholysis to obtain tri (tert-butyl) silicon mercaptan:
3 (CH3)3COH + Sis2 →[(CH3)3CO] 3Sish + H2S
Reaction with sodium sulfide, magnesium sulfide and aluminum sulfide to give sulphosilicate.

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How is Silicon Sulfide SiS2 Powder produced?
1. Put aluminum powder and excess sulfur into the crucible and burn it to get aluminum sulfide. The aluminum sulfide is crushed and mixed with slightly excessive silica sand. Place the mixture in a shingle, then place the shingle in a quartz tube, and heat the quartz tube while injecting a small amount of dry nitrogen. The reaction starts at 1100℃, and the sublimated Sis2 adheres to the low-temperature region of the tube at 1200 ~ 1300℃. When purified, it is sublimated again in nitrogen or vacuum. Tetragonal Sis2 can be prepared by heating the mixture of silicon and sulfur at 5×103MPa and 700℃.
 
2. Decompose hydrocarbon self-based silicon by heating to generate silicon disulfide and sulfide at 250 ~ 300℃.If sulfur is added, it decomposes at a lower temperature. Si-disulfide and ethylthioane (C2H5-S2-C2H5, C2H5-S3-C2H5) are produced by mixing 96g sulfur with 39g Si(SC2H5)4 and heating it at 200℃ for 10min. The latter is dissolved in benzene and filtered to prevent it from mixing with moisture.
 
Applications of Silicon Sulfide SiS2 Powder:

Electronics and Semiconductor Industry: Silicon disulfide powder has the advantages of high purity, high conductivity, and good thermal stability, which is suitable for the semiconductor and electronics industry. In the manufacture of semiconductor devices and integrated circuits, silicon disulfide powder can be used as a protective film and insulating layer to effectively protect the devices from environmental influences. In addition, silicon disulfide can also be used in the manufacture of optical devices and optoelectronic devices to improve the transmittance and stability of the devices.

Ceramics and glass industry: Silicon disulfide powder can be used as a raw material in the ceramics and glass industry to improve the hardness and corrosion resistance of products. In ceramics preparation, silicon disulfide can combine with other substances to form silicate minerals, increasing the denseness and strength of the material. In glass manufacturing, silicon disulfide can be used as a clarifying agent to help remove impurities from the glass and improve the light transmission and purity of the product.

Metal smelting industry: Silicon disulfide powder has a wide range of applications in the metal smelting industry. It can be used as a remover to effectively remove oxygen, nitrogen, and other impurities in metals and improve the purity and performance of metals. At the same time, silicon disulfide can also be used as an additive to improve the mechanical properties, electromagnetic properties, and optical properties of metal materials.

Catalyst and catalyst carrier: With a high specific surface area and porous structure, silicon disulfide powder can be used as a catalyst and catalyst carrier for a variety of chemical reactions. For example, silicon disulfide can be used as a carrier material in combination with metal ions or metal catalysts for hydrogenation reactions, redox reactions, etc.

Paints and coatings: Silicon disulfide powder can be used as a raw material for paints and coatings to prepare coatings with high hardness and wear resistance. For example, adding silicon disulfide to anticorrosive coatings can improve the corrosion and scratch resistance of the coatings and extend the service life of the equipment.

Aerospace: Silicon disulfide powder has a wide range of applications in the aerospace field due to its advantages of high strength, high abrasion resistance, high-temperature resistance, and corrosion resistance. For example, it can be used as the wear-resistant coating of aviation engine parts and the thermal protection coating of spacecraft surfaces.

Medical field: Silicon disulfide powder has good biocompatibility and bioactivity and can be used in the medical field. For example, bioactive ceramic materials can be prepared for the manufacture of artificial joints, dental implants, and other medical devices. In addition, silicon disulfide can be used as a drug carrier for drug delivery and treatment of tumors and other diseases.

Storage Condition of Silicon Sulfide SiS2 Powder:
The damp reunion will affect SiS2 powder dispersion performance and using effects, therefore, Silicon Sulfide SiS2 Powder should be sealed in vacuum packing and stored in a cool and dry room, the Silicon Sulfide SiS2 Powder can not be exposure to air. In addition, the Silicon Sulfide SiS2 Powdershould be avoided under stress.

Packing & Shipping of Silicon Sulfide SiS2 Powder:
We have many different kinds of packing which depend on the Silicon Sulfide SiS2 Powder quantity.
Silicon Sulfide SiS2 Powder packing:vacuum packing, 100g, 500g or 1kg/bag, 25kg/barrel, or as your request.
Silicon Sulfide SiS2 Powder shipping: could be shipped out by sea, by air, by express, as soon as possible once payment receipt.

Packing & Shipping of Silicon Sulfide SiS2 Powder

FAQs of Silicon Sulfide SiS₂ Powder：

Q: What is silicon sulfide used for?

A: Silicon sulfide (SiS₂) powders are utilized in a variety of specialized applications due to their unique chemical and physical properties. They serve as precursors in the synthesis of silicon-based materials, such as silicon carbide and silicon nitride, which are widely used in high-performance ceramics and abrasives. In the electronics industry, SiS₂ can be employed as a raw material for producing silicon compounds that are integral to semiconductor manufacturing. The powder also finds application in sulfur chemistry research, contributing to the development of new sulfur-containing compounds and polymers. Moreover, silicon sulfide's ability to form stable complexes with metals makes it valuable in catalysis, where it can act as a catalyst or catalyst support in various chemical reactions.

Q: Is silicon sulfide safe for human exposure?

A: Handling silicon sulfide should be approached with caution. While there is limited data specifically on the health effects of SiS₂, exposure to fine particles of this compound can potentially cause irritation to the respiratory system, eyes, and skin. Proper safety measures include wearing personal protective equipment (PPE) such as gloves, safety goggles, and a respirator when handling the powder, especially if airborne dust is present. Adequate ventilation and adherence to occupational exposure guidelines are important to minimize risks. Always consult the Safety Data Sheet (SDS) provided by the manufacturer for detailed information on potential health impacts and safe handling practices. It's worth noting that silicon sulfide can react with water to produce hydrogen sulfide, a toxic gas, so it should be kept dry during storage and handling.

Q: What is the formula and structure of silicon sulfide?

A: Silicon sulfide has the chemical formula SiS₂, indicating it consists of one silicon atom (Si) and two sulfur atoms (S). This compound crystallizes in a layered structure, similar to that of molybdenum disulfide, where each silicon atom is bonded to two sulfur atoms in a bent configuration. This arrangement results in sheets of SiS₂ that stack on top of each other. The specific atomic configuration contributes to the material's physical properties, including its low electrical conductivity and thermal stability. The layered structure also gives rise to interesting mechanical properties, making SiS₂ suitable for certain applications requiring flexibility and durability.

Q: Can silicon sulfide be incorporated into composite materials?

A: Yes, silicon sulfide can be integrated into composite materials to enhance specific properties such as thermal stability, corrosion resistance, and chemical reactivity. Composites containing SiS₂ benefit from these attributes while offering improved design flexibility and functionality. For example, incorporating SiS₂ into ceramic matrix composites can lead to materials with enhanced toughness and wear resistance, suitable for use in extreme environments. When used as a reinforcing phase in metal or polymer matrices, silicon sulfide can improve the overall performance of the composite, making it more durable and capable of withstanding harsh conditions. Additionally, the chemical reactivity of SiS₂ can be leveraged in developing advanced materials for catalysis and chemical processing. The versatility of silicon sulfide opens up possibilities for innovation across multiple industries, from aerospace and automotive to electronics and energy.

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