Ta2 O5

semiconductor

· Ta2 O5

Tantalum pentoxide (Ta₂O₅) is a wide-bandgap ceramic oxide semiconductor with high refractive index and excellent dielectric properties. It is primarily used in thin-film capacitors, optical coatings, and integrated circuit applications where its stability, high permittivity, and resistance to corrosion are valuable; it is also under investigation for next-generation photoelectrochemical devices and advanced gate dielectrics in microelectronics where it offers advantages over traditional silicon dioxide in miniaturized components.

thin-film capacitorsoptical interference coatingsCMOS gate dielectricscorrosion-resistant coatingsphotocatalytic devicesintegrated circuits

Compliance & Regulations

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

Units:

si imperial

Property	Value	Unit	Conditions	Source
Band Gap(Eg)	2.519	eV	—

Verified Unverified Low confidence (<80%) Link to source

Property	Value	Unit	Conditions	Source
Formation Energy(ΔHf)	-2.646	eV/atom	—

Verified Unverified Low confidence (<80%) Link to source

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.

Ta2 O5

Electrical Properties

Other Properties

Regulatory Screening

Environmental

Export Control