334103

Silicon nitride

powder, ≥99.9% trace metals basis

• Synonym(s): Trisilicon tetranitride
• Linear Formula: Si₃N₄
• CAS Number: 12033-89-5
• Molecular Weight: 140.28
• EC Number: 234-796-8
• MDL number: MFCD00011230
• UNSPSC Code: 12352300
• PubChem Substance ID: 24860055
• NACRES: NA.23

Properties

• Quality Level: 100
• Assay: ≥99.9% trace metals basis
• form: powder
• particle size: <1 μm
• density: 3.44 g/mL at 25 °C (lit.)
• SMILES string: N12[Si]34N5[Si]16N3[Si]25N46
• InChI: 1S/N4Si3/c1-5-2-6(1)3(5)7(1,2)4(5)6
• InChI key: HQVNEWCFYHHQES-UHFFFAOYSA-N

Description

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.

Safety Information

• Storage Class Code: 11 - Combustible Solids
• WGK: nwg
• Flash Point(F): Not applicable
• Flash Point(C): Not applicable
• Personal Protective Equipment: dust mask type N95 (US), Eyeshields, Gloves