Ta2O3 — Properties & Data | MatWorld

Ta2O3

ceramic

· Ta2O3

Tantalum sesquioxide (Ta₂O₃) is a refractory ceramic compound belonging to the tantalum oxide family, valued for its extreme thermal stability and chemical inertness at high temperatures. It is employed in specialized applications requiring resistance to oxidation and thermal shock, including high-temperature furnace linings, aerospace thermal protection systems, and advanced electronic components where tantalum's inherent properties provide advantages over more common refractory oxides. Ta₂O₃ is notable for its superior hardness and thermal conductivity relative to alternative oxides, making it particularly relevant in environments exceeding 1600°C or where chemical corrosion from molten metals or aggressive gases is a concern.

high-temperature furnace liningsaerospace thermal barriersrefractory materialssemiconductor processing equipmentmolten metal containerschemical processing at extreme temperatures

Compliance & Regulations

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

Units:

si imperial

Property	Value	Unit	Conditions	Source
Density(ρ)	11.67	kg/m³	DFT · OptB88vdW

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Method

Property	Value	Unit	Conditions
Band Gap(Eg)2 entries	0.000	eV	DFT · OptB88vdW
↳	0.000	eV	DFT · PBE
Magnetic Moment(μB)2 entries	0.6140	μB	DFT
↳	0.000	µB	DFT · OptB88vdW

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
Energy Above Hull(ΔEhull)	0.1550	eV/atom	DFT · OptB88vdW
Formation Energy(ΔHf)2 entries	-1.403	eV/atom	DFT
↳	-2.401	eV/atom	DFT · OptB88vdW

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.

Ta2O3

Physical Properties

Electrical Properties

Other Properties

Regulatory Screening

Environmental