Sm2Ti2O7 — Properties & Data | MatWorld

Sm2Ti2O7

ceramic

· JVASP-19040· Sm2Ti2O7

Sm₂Ti₂O₇ is a rare-earth titanate ceramic belonging to the pyrochlore family, composed of samarium and titanium oxides. This material is primarily investigated for high-temperature structural and thermal applications, particularly as a thermal barrier coating (TBC) material and in advanced refractory systems where excellent thermal stability and low thermal conductivity are required. Its notable advantage over conventional alumina-based systems is superior resistance to thermal cycling and chemical degradation at extreme temperatures, making it of significant interest for aerospace and power generation industries, though it remains largely in research and development phases rather than widespread commercial deployment.

thermal barrier coatingshigh-temperature ceramicsaerospace applicationsrefractory materialsthermal management systemsadvanced combustion environments

Compliance & Regulations

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

Units:

si imperial

Property	Value	Unit	Conditions	Source
Density(ρ)	6.210	kg/m³	DFT · OptB88vdW

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Method

Carrier

Property	Value	Unit	Conditions
Band Gap(Eg)2 entries	2.767	eV	DFT · OptB88vdW
↳	3.120	eV	DFT · TBmBJ
High-Frequency Dielectric Constant (ε∞)(ε∞)2 entries	6.183	-	DFT · OptB88vdW
↳	5.208	-	DFT · TBmBJ
Electron Effective Mass(m*e)	1.320	me	DFT · OptB88vdW · 27°C
Hole Effective Mass(m*h)	1.280	me	DFT · OptB88vdW · 27°C
Magnetic Moment(μB)	0.000	µB	DFT · OptB88vdW
Thermoelectric Power Factor(PF)2 entries	0.00124	W/(m·K²)	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	0.00196	W/(m·K²)	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Seebeck Coefficient(S)2 entries	-343.3	μV/K	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	362.6	μV/K	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Spectroscopic Limited Maximum Efficiency (SLME)(SLME)	3.300	%	DFT · TBmBJ

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)	-3.537	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.

Sm2Ti2O7

Physical Properties

Electrical Properties

Other Properties

Regulatory Screening

Environmental