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334103

Sigma-Aldrich

Silicon nitride

powder, ≥99.9% trace metals basis

Synonym(s):

Trisilicon tetranitride

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About This Item

Linear Formula:
Si3N4
CAS Number:
Molecular Weight:
140.28
EC Number:
MDL number:
UNSPSC Code:
12352300
PubChem Substance ID:
NACRES:
NA.23

Quality Level

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

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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.

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

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Synthesis of cubic silicon nitride
Zerr A, et al
Nature, 400, 340-342 null
Silicon Nitride and Related Materials
Riley FR
Journal of the American Ceramic Society. American Ceramic Society, 83(2), 245-265 (2000)
Simone P Rodrigues et al.
Journal of materials science. Materials in medicine, 24(1), 231-239 (2012-10-12)
Commercial femoral head prostheses (cobalt-chromium alloy, yttria partially stabilized zirconia (Y-PSZ) and alumina) and new silicon nitride ceramic ones (nanocrystalline diamond coated and uncoated) were compared in terms of artifact level production by computed tomography (CT). Pelvis examination by CT
Chang-Hyun Park et al.
Optics express, 20(21), 23769-23777 (2012-11-29)
A nanophotonic polarization-independent visible wavelength filter is presented, incorporating a symmetric metal-dielectric resonant structure on quartz substrate, where a sub-wavelength grating, made up of a two-dimensional array of Al square sheets, is integrated with a Si(3)N(4) slab waveguide via an
Orsolya Tapasztó et al.
Journal of nanoscience and nanotechnology, 12(11), 8775-8778 (2013-02-21)
The dispersion properties of single- and multi-walled carbon nanotubes as well as mechanically exfoliated few layer graphene flakes within the silicon nitride ceramic matrix have been investigated. Small angle neutron scattering experiments have been employed to gain information on the

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