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Silicon nitride

Description References

Product Name: Silicon nitride
CAS No.: 12033-89-5
Chemical Name: Silicon nitride
Synonyms: Si3N4 SILICON NITRIDE;silicon(iv) nitride, electronic grade;E 05;E 10;β-Si3N4;α-Si3N4;SI3N4 B7;SI3N4 M11;ALPHA HYDROXY;E 05 (nitride)
CBNumber: CB8744847
Molecular Formula: N4Si3
Formula Weight: 140.2833
MOL File: 12033-89-5.mol

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Silicon nitride Property

Melting point:: 1900 °C
Density: 3.44 g/mL at 25 °C (lit.)
bulk density: 0.046g/mL
refractive index: 2.8
RTECS: VW0650000
form: powder
color: Pale gray
Specific Gravity: 3.44
Resistivity: 10*6 (ρ/μΩ.cm)
Water Solubility: Insoluble water.
Hydrolytic Sensitivity: 1: no significant reaction with aqueous systems
Crystal Structure: Hexagonal
Merck: 14,8497
Stability:: Stable.
Modulus of Elasticity: 120 - 150 GPa
Poissons Ratio: 0.20
Shear Modulus: 50.0 - 62.5 GPa, Calculated
Hardness, Vickers: 1600
CAS DataBase Reference: 12033-89-5(CAS DataBase Reference)
EPA Substance Registry System: Silicon nitride (Si3N4) (12033-89-5)

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Safety

Hazard Codes: Xi
Risk Statements: 37
Safety Statements: 22-24/25
WGK Germany: 3
F: 10
TSCA: Yes

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Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Warning

Hazard statements

H315Causes skin irritation

H319Causes serious eye irritation

Precautionary statements

P264Wash hands thoroughly after handling.

P264Wash skin thouroughly after handling.

P280Wear protective gloves/protective clothing/eye protection/face protection.

P302+P352IF ON SKIN: wash with plenty of soap and water.

P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

P332+P313IF SKIN irritation occurs: Get medical advice/attention.

P337+P313IF eye irritation persists: Get medical advice/attention.

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N-Bromosuccinimide Price

Sigma-Aldrich

Product number: NISTRM8983
Product name: Silicon nitride
Purity: NIST? RM 8983
Packaging: 4.5G
Price: $1200
Updated: 2025/07/31

Sigma-Aldrich

Product number: NIST8983
Product name: Silicon Nitride Powder
Purity: NIST<SUP>®</SUP> SRM<SUP>®</SUP>
Packaging: 1 unit
Price: $1080
Updated: 2025/07/31

Sigma-Aldrich

Product number: NIST1900
Product name: Silicon nitride powder - specific surface area standard
Purity: NIST? SRM? 1900
Packaging: 4g
Price: $794
Updated: 2025/07/31

Sigma-Aldrich

Product number: GF99991300
Product name: Silicon nitride
Purity: powder, weight 200?g, 10 max. part. size (micron), condition alpha si3n4 (85% minimum)
Packaging: 1EA
Price: $509
Updated: 2025/07/31

Sigma-Aldrich

Product number: 248622
Product name: Silicon nitride
Purity: predominantly β-phase, ≤10micron primary particle size
Packaging: 100g
Price: $106.4
Updated: 2025/07/31

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Silicon nitride Chemical Properties,Usage,Production

Description

Silicon nitride (molecular formula Si3N4) is a kind of chemical compound comprised of both silicon and nitrogen elements. It appears as a white solid with a high melting point. It is chemically stable upon the presence of dilute HF and hot H2SO4. It has a series of properties such as high strength among a wide temperature range, high fracture toughness, high hardness, outstanding wear resistance and chemical property. It has a strikingly high thermal shock resistance. It has a wide applications in various kinds of fields. In automobile industry, it is an important materials for engine parts. It can also be applied to the manufacturing of bearings due to its high shock resistance. For example, in spacecraft, silicon nitride ceramic is capable of surviving the severe thermal shock generated in the hydrogen/oxygen rocket engines. It can also be used as abrasive and cutting tools due to its harness and resistance to wear. In electronics, it can be used as an insulator and chemical barrier during the production of integrated circuits. There are several method for the manufacturing the silicon nitride. 1. The powdered silicon is subject to a heating reaction of 1300-1400 °C in the atmosphere of nitrogen. 2 Diimide route which involves the reaction of SiCl and NH3. 3 Silicon dioxide is subject to carbothemral reduction at 1300-1400 °C under the presence of nitrogen.

References

https://en.wikipedia.org/wiki/Silicon_nitride
http://accuratus.com/silinit.html

Chemical Properties

slightly beige powder

Physical properties

Gray amorphous powder or crystals. Resistant to thermal shock. Good oxidation resistance up to 1500°C but decomposes into nitrogen and silicon above 1850°C. Excellent corrosion resistance to molten nonferrous metals such as Al, Pb, Zn, Cd, Bi, Rb, and Sn, and molten salts like NaCl-KCl, NaF, and silicate glasses. However, corroded by molten Mg, Ti, V, Cr, Fe, and Co, cryolite, KOH, and Na₂O.

Uses

As high tempereture engineering material for use in gas turbines, diesel engines.

Uses

Silicon nitride (Si3N4), resistant to oxidation, is an excellent coating for metals, as well as an adhesive and abrasive, and it is used in high-temperature crucibles. It has proven useful as heat-resistant substance for the nozzles on rocket engines.

Uses

Silicon Nitride is used in preparation of thermal conductive Poly(Me Methacrylate)/Silicon Nitride nanocomposites via click chemistry.

General Description

Silicon nitride based ceramics possess high fracture toughness, hardness and wear resistance, resistance to corrosion, thermal stability. Two known polymorphs of silicon nitride exist, alpha and beta Si₃N₄, both have hexagonal structure. A study shows that a third state, cubic spinel structure, has also been synthesized.

Flammability and Explosibility

Non flammable

Silicon nitride Preparation Products And Raw materials

Raw materials

Carbon Black Silicon Urea Tetrachlorosilane Silicon dioxide Aluminum oxide

Preparation Products

Silicon carbide

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View Lastest Price from Silicon nitride manufacturers

Hebei Andu Technology Com.,Ltd

Product: Silicon nitride 12033-89-5
Price: US $3.60/kg
Min. Order: 1kg
Purity: ≥99%
Supply Ability: 3000tons/month
Release date: 2024-07-30

Sense Chemicals (Shanghai) Co., Ltd.

Product: Silicon nitride 12033-89-5
Price: US $0.00/kg
Min. Order: 1kg
Purity: 99%
Supply Ability: 20ton/month
Release date: 2022-10-17

henan kanbei chemical co.,ltd

Product: Silicon nitride 12033-89-5
Price: US $0.00/kg
Min. Order: 1kg
Purity: 99%
Supply Ability: 1000kg
Release date: 2022-09-26

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Silicon nitride (>90% alpha phase), 0.2-4.0 microns (99%-Si)

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SI3N4 B7

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