Ca2Ta2O7 — Properties & Data | MatWorld

Ca2Ta2O7

ceramic

· JVASP-49178· Ca2Ta2O7

Calcium tantalate (Ca₂Ta₂O₇) is a ceramic compound belonging to the family of refractory oxides, characterized by high melting points and chemical stability. This material is primarily of research and advanced applications interest, used in specialized contexts such as high-temperature structural components, thermal barrier coatings, and electronic ceramics where its thermal and chemical resistance provide advantages over conventional oxides. Its tantalum content makes it notably stable in extreme environments, though its cost and processing complexity limit adoption compared to more common ceramic alternatives like alumina or zirconia.

high-temperature structural ceramicsthermal barrier coatingsrefractory applicationselectronic ceramicsresearch materials

Compliance & Regulations

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

Units:

si imperial

Property	Value	Unit	Conditions	Source
Density(ρ)	6.358	kg/m³	DFT · OptB88vdW

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Carrier

Property	Value	Unit	Conditions
Band Gap(Eg)	2.284	eV	DFT · OptB88vdW
High-Frequency Dielectric Constant (ε∞)(ε∞)	4.979	-	DFT · OptB88vdW
Electron Effective Mass(m*e)	0.8800	me	DFT · OptB88vdW · 27°C
Hole Effective Mass(m*h)	2.820	me	DFT · OptB88vdW · 27°C
Magnetic Moment(μB)	0.000	µB	DFT · OptB88vdW
Thermoelectric Power Factor(PF)2 entries	0.00128	W/(m·K²)	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	0.00106	W/(m·K²)	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Seebeck Coefficient(S)2 entries	-251.4	μV/K	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	386.9	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)	0.000	eV/atom	DFT · OptB88vdW
Formation Energy(ΔHf)	-3.288	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.

Ca2Ta2O7

Physical Properties

Electrical Properties

Other Properties

Regulatory Screening

Environmental