Aluminum Nitride (AlN) — Properties & Data | MatWorld

Aluminum Nitride (AlN)

Name: Aluminum Nitride (AlN)
Brand: MatWorld

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· AlN· Aluminum Nitride

Aluminum Nitride (AlN) is a wide-bandgap semiconductor ceramic compound combining aluminum and nitrogen in a 1:1 stoichiometry, belonging to the III-V nitride family alongside GaN and InN. It is primarily used in high-power electronics and optoelectronics where excellent thermal conductivity combined with electrical insulation is critical—such as in LED substrates, power device packaging, and RF/microwave components for telecommunications and defense applications. Engineers select AlN over alternatives like alumina when thermal management of semiconductor junctions is paramount, and over GaN when electrical isolation rather than conductivity is required.

LED thermal substratesRF/microwave packagingHigh-power electronics coolingPiezoelectric devicesSemiconductor heat spreadersOptoelectronic device mounting

Compliance & Regulations

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

Units:

si imperial

Property OverviewNormalized to typical max values

Property	Value	Unit	Conditions	Source
Young's Modulus(E)	308.0	GPa	—

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2 interactive curves for this material

Stress-strain, S-N fatigue and environmental knockdown curves are free with an account.

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Method

Property	Value	Unit	Conditions
Melting Point / Solidus(Tm)	2,473	K	—
Specific Heat Capacity(Cp)	740	J/(kg·K)	—
Thermal Conductivity(k)2 entries	235	W/(m·K)	Measured
↳	285	W/(m·K)	—
Thermal Conductivity vs Temperature(k(T))2 entries	Curve (21 pts)	W/(m·K)	Measured · single crystal
↳	Curve (6 pts)	W/(m·K)	Measured · sintered ceramic
Coefficient of Thermal Expansion(α (CTE))	0.00000450	1/K	—

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
Density(ρ)	3.260	kg/m³	—

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Method

Carrier

Property	Value	Unit	Conditions
Band Gap(Eg)3 entries	5.900	eV	Measured
↳	4.474	eV	DFT · OptB88vdW
↳	5.197	eV	DFT · TBmBJ
Dielectric Constant (Relative Permittivity)(εr)	8.500	-	—
High-Frequency Dielectric Constant (ε∞)(ε∞)2 entries	4.445	-	DFT · OptB88vdW
↳	3.799	-	DFT · TBmBJ
Electron Effective Mass(m*e)	0.3233	me	DFT · OptB88vdW · 27°C
Hole Effective Mass(m*h)	2.620	me	DFT · OptB88vdW · 27°C
Thermoelectric Power Factor(PF)2 entries	0.000595	W/(m·K²)	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	0.00140	W/(m·K²)	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Seebeck Coefficient(S)2 entries	-90.15	μV/K	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	312.7	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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2 interactive curves for this material

Stress-strain, S-N fatigue and environmental knockdown curves are free with an account.

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Property	Value	Unit	Conditions	Source
Refractive Index vs Wavelength(n(λ))2 entries	Curve (101 pts)	-	Measured · ordinary ray
↳	Curve (101 pts)	-	Measured · extraordinary ray

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
Formation Energy(ΔHf)	-1.648	eV/atom	Measured

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

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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.

Aluminum Nitride (AlN)

Mechanical Properties

Thermal Properties

Physical Properties

Electrical Properties

Optical Properties

Other Properties

Regulatory Screening

Environmental

Export Control

Safety & Biocompatibility

Quality & Standards