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What is Silicon Monoxide? ? Silicon monoxide The chemical formula for SiO is an inorganic substance. Under normal temperatures and pressure, the powder is black-brown or yellowish. It has a melting and boiling point of 1802degC respectively. The density is 2,13g/cm3. It is hardly water soluble and can dissolve in the mixture of dilute hydrofluoric acids and nitrics acid. The silicon tetrafluoride that is released when heated in the air will turn into white silica. The silicon monoxide in air is unstable, and it will oxidize. When the silicon monoxide vapour is slowly condensed (see disproportionation reactions), it will disproportionate into silicon and silica dioxide.
Silicon monoxide preparation
1. After silicon dioxide has reacted with elemental silicon, rapid cooling is required to make silicon monoxide.
SiO2 + S – 2SiO.
2. Mix silicon dioxide with SiO2 of 99.5% with coal tar powder. The C/SiO2 molar mixing ratio is 2.0. Heat the mixture under reduced pressurized, at 1600°C, 1.013kPa.
SiO2+C-SiO+CO.


Property and stability properties of silicon monoxide
Silicon monoxide The material is not stable. It will oxidize into silicon dioxide in air and only remains stable at temperatures over 1200degC.
Avoid open flames and high temperatures. It is insoluble with water and soluble with a mix acid of dilute hydrofluoric acids and nitric Acid. Heat and electricity are well insulated by this material. It is oxidized in air and forms a silicon oxide film. In oxygen, it burns and then reacts with the water to form hydrogen. In the warm alkaline solution, hydrogen is formed, and then silicate is dissolved.
Silicon monoxide use
A fine powder of silicon monoxide can be used to synthesize fine ceramics due to its high activity. This includes silicon nitride, and silicon carbide. Useful in the preparation optical glass and semiconductors.
As a protective layer, vaporize it and apply it to the mirror surfaces of optical instruments. Preparation semiconductor materials.

Silicomonoxide: precautions
In the event of eye contact, rinse with lots of water immediately and take to a doctor.
Wear protective clothing.
Eyes, skin, respiratory tract and eyes are irritated.
Most water bodies are only mildly affected by this substance. Do not allow large quantities of undiluted products to enter groundwater, waterways or sewage system.
Avoid light, open flames and high temperatures.
Place in a ventilated, dry and airtight place.
Inhalation: Move the patient to fresher air if inhaled.
Skin contact: Remove all contaminated clothing. Wash your skin with soap and warm water. Seek medical attention if you feel unwell.
Eye contact: Separate eyelids, and rinse them with normal saline. Seek medical attention immediately.
Rinse your mouth with water and avoid vomiting. Seek medical attention immediately.
Advice for protecting rescuers – Move the patient into a safe area. Consult with a doctor. The doctor should see this sheet of chemical safety information.

(aka. Technology Co. Ltd., a global leader in chemical materials and nanomaterials with more than 12 year’s experience as a supplier of high-quality chemicals. Silicon monoxide is produced by our company with high purity, fine particles and impurity contents. Please. Contact Us if necessary.

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