Factory Supply Silane Liquid CAS 7803-62-5 Raw Materials

MF: H4Si

MW: 32.12

EINECS:232-263-4

Specification:Silane Liquid

Sample:Silane Liquid

Brand: Silane Liquid

Appearance: White Liquid

Storage: Cool Dry Place

Brand: Globalchemical

Shelf Life: 2 Years

Test Method: HPLC

Silane Liquid Usage and Synthesis.

Silane Liquid is used as a gas source to provide silicon components for the manufacture of high-purity polycrystalline, monocrystalline, microcrystalline, amorphous, silicon nitride, silicon oxide, heterogeneous silicon, and various metal silicides. Because of its high purity and the ability to achieve fine control, Silane Liquid has become an important specialty gas that many other silicon sources cannot replace.

Silane Raw Materials are used in the microelectronics and photonics industries for solar cells, flat panel displays, glass and steel plating, and are the world's only mass-produced intermediate for high purity silicon in pellet form.

Silane Raw Materials are still emerging for high-tech applications, including the manufacture of advanced ceramics, composite materials, functional materials, biomaterials, high energy materials, etc., becoming the basis for many new technologies, materials and devices. Silane Raw Materials has a very wide range of spontaneous ignition and a very high combustion energy, which makes it a highly dangerous gas.

Application/Function of Silane Liquid

Silane CAS 7803-62-5 is the silicon source for the chemical vapor deposition process of monocrystalline silicon, polysilicon epitaxial wafers, silicon dioxide, silicon nitride and phosphor silica glass in the semiconductor industry, and is widely used in the production and development of solar cells, silicon copier drums, photoelectric sensors, optical fibers and special glasses.

Silane CAS 7803-62-5 application silicon tetrahydride is widely used in many industries and fields such as electronics industry, energy industry, glass industry, chemical industry and high-tech fields, etc. It is mainly used for the production of liquid crystal TFT, solar cells, semiconductors, photoreceptor materials, etc. In recent years, due to the rapid development of China's integrated circuit industry, super-scale or large-scale integrated circuits in the country has a lot of room for development, which will make the increasing consumption of silicon tetrahydroxide. Meanwhile, as the solar energy market boom will continue, it is predicted that the global silicon tetrahydride market will grow at an average annual rate of 20% from 2010 to 2020. Silicon tetrahydroxide is an important specialty gas and an important indicator of whether a country's gas industry is advanced. As a large country with a rapidly developing economy, China consumes nearly 4,000 tons of polysilicon per year, and about 200 to 300 tons of silicon tetrahydride per year, with a large exposure to the population.

• 1.Silane Raw Materials are used for integrated circuit manufacturing, solar cells, coated reflective glass, etc.
• 2. Silane Liquid is used in the manufacture of integrated circuits, solar cells, coated reflective glass, etc.

Property and Stability of Silane Liquid

Silane Liquid is extremely sensitive to oxygen and air. Silane Liquid is extremely sensitive to oxygen and air. Silane with a certain concentration can also react explosively with oxygen at a temperature of - 180℃. The reaction of solid silane with liquid oxygen is very dangerous, and Silane Liquid burns with a dark yellow flame and reacts in the presence of sufficient oxygen.

Silane CAS 7803-62-5 is a foul-smelling, colorless, toxic gas at room temperature and pressure. d-185 (liquid) 0. 68; cured at about - 200°C, melting point - 185°C, boiling point - 112°C. Silane CAS 7803-62-5 is stable at room temperature and decomposes completely to silicon and hydrogen when heated to 400°C. Silane CAS 7803-62-5 is flammable and explosive. Flammable and explosive, explosive combustion occurs in air or halogen gas.

Silane Liquid reacts with CC14 and metal halides. Decompose slowly in water, almost insoluble in ethanol, ether, benzene, chloroform and carbon tetrachloride, etc.

Exposure to silane can cause eye irritation and inhalation can cause headache, nausea, mucous membrane and respiratory irritation. The 8-hour time-weighted average (TLV-TWA) of the threshold limit for exposure to silane in an occupational setting is 5 x 10-6, as determined by the American Conference of Governmental Industrial Hygienists (ACGIH) and adopted by the U.S. Occupational Safety and Health Administration (OSHA).

Silane CAS 7803-62-5 should be used with proper protection. Store in a dry, cool, ventilated room. Cylinders should be stored upright and stationary. Protect cylinders from extremes of temperature and weather. Do not store and transport with flammable products and oxidizers, and keep away from fire sources.

Avoid strong oxidizers, strong bases and halogens. The density of gas in standard condition is 1.44g/L, and the relative density of liquid is 0.68(-185℃). Vapor pressure 11mmHg(1mmHg=133.322Pa)(-160℃), 102mmHg(-140℃), 470mmHg(-120℃). Infrared spectrum wavelengths 2191cm-1, 914cm-1. It is gaseous at room temperature and does not decompose significantly within several months during storage. Because methylsilane is almost insoluble in grease, it can be stored in a container with a stopper coated with grease.

Silane Liquid is chemically much more active than alkanes and is highly susceptible to oxidation. It is spontaneously combustible when in contact with air, does not react with nitrogen below 25°C, and does not react with hydrocarbon compounds at room temperature. It reacts violently with oxygen, even at -180℃.

Silane CAS 7803-62-5 and chlorofluorocarbon fire extinguishing agent will react violently, so you can not use this type of fire extinguishing agent. The explosion limit is 0.8%~98%.

Production method of Silane Liquid

Silane Liquid is purified by low temperature adsorption continuous liquefaction distillation process. Silane is produced by reacting magnesium silicon alloy with ammonia bromide in liquid ammonia, and then purified by low temperature adsorption, continuous liquefaction and distillation.

A solution of 1.14g LiAlH4 in 70mL of ether and 2.30mL SiCl4 in 50mL of ether were filled in the reaction flask and the addition funnel respectively for the preparation of the device solution of graph silane. Throughout the synthesis, the cold bath and finger cooling tubes were kept at -15 to -20°C and -78.5°C, respectively. After evacuating the apparatus, the ether began to reflux, when care had to be taken to avoid excessive quench boiling.

Then, the U-tube receiver near the reaction apparatus was cooled to -95°C (with toluene freeze paste) and the remaining four receivers were cooled to -196°C (liquid nitrogen).

The SiCl4+ ether solution was added to the LiAlH4 suspension over 15 min under stirring. To avoid violent reflux of the ether, the methylsilane was continuously dispensed at a moderate rate. The reaction rate can be easily controlled by adjusting the glass piston between the reactor and the vacuum line.

After the SiCl4 was added, stirring was continued for 15-20 min to ensure the reaction was complete. During this period, the reactor and the vacuum system are cut off to avoid excessive ether escape. After the methyl silane is drained from the vacuum system, air is passed into the reactor and the vacuum system is disconnected.