AlN — Properties & Data | MatWorld

AlN

metal

· AlN

Aluminum nitride (AlN) is a wide-bandgap ceramic compound that combines metallic aluminum with nitrogen, forming a hexagonal crystal structure with exceptional thermal and electrical properties. It is widely used in high-power electronics, optoelectronics, and thermal management applications where efficient heat dissipation and electrical isolation are critical—particularly in RF power amplifiers, LED substrates, and integrated circuit packaging. Engineers select AlN over alternatives like alumina or silicon carbide when superior thermal conductivity paired with electrical insulation is needed in space-constrained or high-frequency applications.

RF power amplifiersLED thermal substratesIntegrated circuit packagingHigh-frequency electronicsThermal management ceramicsMicroelectronic device isolation

Compliance & Regulations

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

Units:

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Method

Property	Value	Unit	Conditions	Source
Bulk Modulus(K)3 entries	28,196.1	ksi	DFT
↳	31,019.2	ksi	DFT · OptB88vdW
↳	28,196.1	ksi	DFT · PBE
Elastic Compliance Tensor(Sij)	Matrix (redacted)	1/GPa	DFT · PBE
Elastic Anisotropy(AU)	0.03437	-	DFT · PBE
Elastic Stiffness Tensor(Cij)	Matrix (redacted)	ksi	DFT · PBE
Exfoliation Energy(Eexf)	499.2	meV/atom	DFT · OptB88vdW
Poisson's Ratio(ν)2 entries	0.2500	-	DFT · OptB88vdW
↳	0.2413	-	DFT · PBE
Shear Modulus(G)3 entries	17,626.6	ksi	DFT
↳	19,690.3	ksi	DFT · OptB88vdW
↳	17,626.6	ksi	DFT · PBE

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
Thermal Conductivity(k)	135.8	BTU/(hr·ft·°F)	Measured

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Property	Value	Unit	Conditions	Source
Density(ρ)	0.1236	lb/in³	DFT · OptB88vdW

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Method

Carrier

Property	Value	Unit	Conditions	Source
Band Gap(Eg)3 entries	5.900	eV	Measured
↳	4.474	eV	DFT · OptB88vdW
↳	5.197	eV	DFT · TBmBJ
Dielectric Constant (Relative Permittivity)(εr)2 entries	78.96	-	DFT · OptB88vdW
↳	11.26 range 5.103–17.43median of 2 measurements	-	DFT · PBEsol
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
Magnetic Moment(μB)	0.000	µB	DFT · OptB88vdW
Piezoelectric Modulus(eij)2 entries	0.000	C/m²	DFT · OptB88vdW
↳	0.2859	C/m²	DFT · PBE
Piezoelectric Stress Tensor(eij)	Matrix (redacted)	C/m²	DFT · PBE
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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Method

Property	Value	Unit	Conditions	Source
Energy Above Hull(ΔEhull)	0.1269	eV/atom	DFT · OptB88vdW
Formation Energy(ΔHf)2 entries	-1.523	eV/atom	DFT · OptB88vdW
↳	-1.648	eV/atom	Measured

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.

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

Export Control

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.