TaO3 — Properties & Data | MatWorld

TaO3

ceramic

· JVASP-37460· TaO3

Tantalum oxide (TaO₃) is a ceramic compound belonging to the transition metal oxide family, valued for its chemical stability, high melting point, and dielectric properties. It is primarily used in electronic components, particularly in capacitors and thin-film applications in semiconductor manufacturing, as well as in specialized optical and refractory applications where resistance to corrosion and thermal stress is critical. Tantalum oxides are preferred in high-reliability electronics due to superior performance compared to conventional dielectrics, though they are typically deployed as thin films or in composite structures rather than bulk monolithic components.

capacitor dielectricssemiconductor thin filmshigh-temperature refractoriesoptical coatingscorrosion-resistant applicationselectronic device packaging

Compliance & Regulations

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

Units:

si imperial

Property	Value	Unit	Conditions	Source
Density(ρ)	10.87	kg/m³	DFT · OptB88vdW

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Method

Carrier

Property	Value	Unit	Conditions
Band Gap(Eg)2 entries	0.000	eV	DFT · OptB88vdW
↳	0.000	eV	DFT · TBmBJ
Magnetic Moment(μB)	1.736	µB	DFT · OptB88vdW
Thermoelectric Power Factor(PF)2 entries	0.000913	W/(m·K²)	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	0.000821	W/(m·K²)	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Seebeck Coefficient(S)2 entries	30.05	μV/K	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	28.31	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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Property	Value	Unit	Conditions	Source
Energy Above Hull(ΔEhull)	1.125	eV/atom	DFT · OptB88vdW
Formation Energy(ΔHf)	-1.539	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.

TaO3

Physical Properties

Electrical Properties

Other Properties

Regulatory Screening

Environmental