Si2CN4 — Properties & Data | MatWorld

Si2CN4

ceramic

· JVASP-13087· Si2CN4

Si₂CN₄ is a silicon carbonitride ceramic compound that combines silicon, carbon, and nitrogen to form a high-performance structural ceramic. This material belongs to the family of non-oxide ceramics and is primarily of research and advanced development interest, valued for its potential combination of thermal stability, hardness, and oxidation resistance at elevated temperatures. Silicon carbonitrides are candidates for extreme-environment applications where traditional silicon nitride or silicon carbide may have limitations, particularly in aerospace propulsion systems and thermal protection where lightweight ceramics with superior creep resistance are required.

aerospace thermal protectionhigh-temperature engine componentsoxidation-resistant coatingsadvanced composite matriceschemical vapor deposition researchultra-high-temperature ceramics

Compliance & Regulations

?Conflict Free?RoHS?REACH?TSCA?Prop 65

Units:

si imperial

Property	Value	Unit	Conditions	Source
Density(ρ)	0.07915	lb/in³	DFT · OptB88vdW

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Method

Carrier

Property	Value	Unit	Conditions
Band Gap(Eg)2 entries	4.464	eV	DFT · OptB88vdW
↳	5.801	eV	DFT · TBmBJ
Dielectric Constant (Relative Permittivity)(εr)	9.469	-	DFT · OptB88vdW
High-Frequency Dielectric Constant (ε∞)(ε∞)2 entries	3.750	-	DFT · OptB88vdW
↳	2.994	-	DFT · TBmBJ
Magnetic Moment(μB)	0.000	µB	DFT · OptB88vdW
Piezoelectric Modulus(eij)	0.2990	C/m²	DFT · OptB88vdW
Thermoelectric Power Factor(PF)2 entries	0.00174	W/(m·K²)	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	0.000819	W/(m·K²)	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Seebeck Coefficient(S)2 entries	-289.7	μV/K	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	433.1	μV/K	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Spectroscopic Limited Maximum Efficiency (SLME)(SLME)	0.000	%	DFT · TBmBJ

N entriesMultiple entries per property — large groups are collapsed; click a summary row to expand. Use filters above to narrow by form, heat treatment, basis, or test environment.

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Property	Value	Unit	Conditions	Source
Energy Above Hull(ΔEhull)	0.09690	eV/atom	DFT · OptB88vdW
Formation Energy(ΔHf)	-0.7015	eV/atom	DFT · OptB88vdW

Verified Unverified Low confidence (<80%) Link to source

Reference data from cited sources. Not verified or certified by MatWorld Inc. Verify against the source before use in design. Terms: engineering data

Regulatory Screening

Environmental

RoHS, REACH, and Prop 65 statuses are validated against official substance lists (ECHA SVHC Candidate List, OEHHA Prop 65, RoHS Annex II). Other regulations are estimated from composition and material classification. All screening is a starting point for due diligence — always verify with your supplier before making compliance decisions.

Si2CN4

Physical Properties

Electrical Properties

Other Properties

Regulatory Screening

Environmental