Er2Hf2O7 — Properties & Data | MatWorld

Er2Hf2O7

ceramic

· JVASP-34740· Er2Hf2O7

Er2Hf2O7 is a rare-earth hafnate ceramic compound belonging to the pyrochlore oxide family, combining erbium and hafnium oxides in a 1:1 stoichiometric ratio. This material is primarily investigated for high-temperature thermal barrier coating (TBC) applications and advanced refractory systems, where it offers potential advantages over conventional yttria-stabilized zirconia due to its lower thermal conductivity and higher melting point. Er2Hf2O7 remains largely in the research and development phase, with particular interest in aerospace and power generation sectors seeking improved thermal management in extreme environments such as jet engine hot sections and next-generation turbine components.

thermal barrier coatingshigh-temperature aerospace applicationsturbine blade protectionrefractory materialsadvanced ceramics researchextreme environment engineering

Compliance & Regulations

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

Units:

si imperial

Property	Value	Unit	Conditions	Source
Density(ρ)	9.434	kg/m³	DFT · OptB88vdW

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

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Carrier

Property	Value	Unit	Conditions
Band Gap(Eg)	3.089	eV	DFT · OptB88vdW
High-Frequency Dielectric Constant (ε∞)(ε∞)	4.516	-	DFT · OptB88vdW
Electron Effective Mass(m*e)	0.6200	me	DFT · OptB88vdW · 27°C
Hole Effective Mass(m*h)	1.360	me	DFT · OptB88vdW · 27°C
Magnetic Moment(μB)	0.000	µB	DFT · OptB88vdW
Thermoelectric Power Factor(PF)2 entries	0.000835	W/(m·K²)	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	0.00206	W/(m·K²)	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Seebeck Coefficient(S)2 entries	-151.1	μV/K	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	381.7	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)	0.02210	eV/atom	DFT · OptB88vdW
Formation Energy(ΔHf)	-3.824	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.

Er2Hf2O7

Physical Properties

Electrical Properties

Other Properties

Regulatory Screening

Environmental