MgAl2O4 — Properties & Data | MatWorld

MgAl2O4

ceramic

· MgAl2O4

Magnesium aluminate spinel (MgAl₂O₄) is a ceramic compound belonging to the spinel family, characterized by its cubic crystal structure and excellent thermal stability. It is widely used in high-temperature applications including refractories for furnace linings, kiln furniture, and crucibles, as well as in optical windows and transparent armor systems where its hardness and chemical inertness are valuable. Engineers select MgAl₂O₄ over alternatives like alumina when superior thermal shock resistance, low porosity, and dimensional stability at elevated temperatures are critical, or when optical clarity combined with mechanical strength is required.

refractory liningshigh-temperature furnace applicationskiln furnituretransparent armor/ballistic windowsoptical domeschemical crucibles

Compliance & Regulations

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

Units:

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Method

Property	Value	Unit	Conditions	Source
Bulk Modulus(K)3 entries	180.4	GPa	DFT
↳	205.7	GPa	DFT · OptB88vdW
↳	180.4	GPa	DFT · PBE
Elastic Compliance Tensor(Sij)	Matrix (redacted)	1/GPa	DFT · PBE
Elastic Anisotropy(AU)	1.239	-	DFT · PBE
Elastic Stiffness Tensor(Cij)	Matrix (redacted)	Pa	DFT · PBE
Poisson's Ratio(ν)2 entries	0.2500	-	DFT · OptB88vdW
↳	0.2744	-	DFT · PBE
Shear Modulus(G)3 entries	95.81	GPa	DFT
↳	134.6	GPa	DFT · OptB88vdW
↳	95.81	GPa	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)	16.00	W/(m·K)	Measured

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Property	Value	Unit	Conditions	Source
Density(ρ)	3.850	kg/m³	DFT · OptB88vdW

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Carrier

Property	Value	Unit	Conditions	Source
Band Gap(Eg)	5.634	eV	DFT · OptB88vdW
High-Frequency Dielectric Constant (ε∞)(ε∞)	3.024	-	DFT · OptB88vdW
Magnetic Moment(μB)	0.000	µB	DFT · OptB88vdW
Thermoelectric Power Factor(PF)2 entries	0.000601	W/(m·K²)	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	0.00123	W/(m·K²)	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Seebeck Coefficient(S)2 entries	-97.74	μV/K	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	480.8	μV/K	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C

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)	0.09030	eV/atom	DFT · OptB88vdW
Formation Energy(ΔHf)2 entries	-3.177	eV/atom	DFT · OptB88vdW
↳	-3.404	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

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.