Trimethylaluminum is an organic compound with the chemical formula C3H9Al, and is a colorless transparent liquid. It is highly flammable in the air, and its vapor is explosive when mixed with air. React strongly with water and release a large amount of heat. Trimethylaluminum is a commonly used raw material for synthesizing many organic metal compounds and catalysts.
Trimethylaluminum has a wide range of applications, the following is its main application introduction:
Precursor material: Trimethylaluminum can be used as a precursor material for manufacturing semiconductor devices such as solar cells, leds, and integrated circuits. It can be used together with other organomemetal compounds to form various metal compound films on the surface of semiconductor materials, such as aluminum film, aluminum-doped silicon oxide (SiO2) film, by chemical vapor deposition (CVD) or ALD methods.
Catalysts and auxiliaries: Trimethylaluminum can be used as catalysts and auxiliaries for the manufacture of various semiconductor devices. For example, it can be used as a catalyst for the manufacture of high-purity silicon crystals, and as an auxiliary for the manufacture of high-purity zinc oxide crystals.
Third generation semiconductor material preparation: trimethylaluminum can be used to prepare third generation semiconductor materials, such as aluminum nitride (AlN), gallium nitride (GaN), silicon carbide (SiC), etc. These materials can be used to manufacture high-frequency, high-power, high-temperature, high-voltage semiconductor devices, such as power electronic devices, microwave devices, etc.
Density 0.81 g/mL at 25 ° C
Boiling point 126 ° C
Melting point 15 ° C
Molecular formula C3H9Al
Molecular weight 72.085
Flash point 40 ° F
Accurate quality 72.051964
LogP 1.75140
Appearance: Transparent and colorless liquid igniter
Refractive index 1.432 (12 º C)
Storage conditions
Sealed storage, stored in a cool, dry, and ventilated place, anti-static.
Store away from water sources, heat sources, halogenated hydrocarbons, alcohol, and amines.
Avoid contact with air and water.
Stability
Decomposition with water, air, oxides, alcohol, halogenated hydrocarbons, acids, alkalis, halides, ammonia, and amines.
Physical and chemical properties: Under normal temperature and pressure, trimethylaluminum is a colorless transparent liquid with strong reactivity. It spontaneously ignites in air and can ignite instantly. It reacts violently with alcohol and acids with active hydrogen, and with water. Even in cold water, it can produce explosive decomposition reactions and generate methane, and sometimes ignite. Slowly decompose to produce methane at 3Chemicalbook00 ℃. Form stable complexes with AsH3, PH3, ethers, tertiary amines, and other Lewis bases. It can be mixed with fatty hydrocarbons such as hexane and heptane, as well as aromatic hydrocarbons such as toluene and xylene in any ratio. Trimethylaluminum, which is released to less than 25% using hydrocarbon based solvents, loses its self ignitability.
Hazardous characteristics can form explosive mixtures with air; Flammable, pay attention to the risk of dust explosion; The flame may reignite after being extinguished; Be aware of the risk of spontaneous combustion; Contact with water may cause strong or explosive reactions in the Chemicalbook; Containers exposed to fire may leak their contents through pressure safety valves; Heating or contact with flames may cause expansion or explosive decomposition.
