Tm2O3 — Properties & Data | MatWorld

Tm2O3

Name: Tm2O3
Brand: MatWorld

semiconductor

· Tm2O3

Tm₂O₃ (thulium oxide) is a rare-earth ceramic semiconductor belonging to the lanthanide oxide family, characterized by high density and significant mechanical stiffness. It is primarily used in specialized optics, phosphor materials for displays and lighting, and as a dopant in laser host crystals—particularly in fiber lasers and solid-state laser systems where its unique optical properties enable efficient energy conversion. Engineers select Tm₂O₃ over conventional semiconductors when rare-earth luminescence, high-temperature stability, or infrared emission capabilities are critical to device performance, though cost and material availability typically limit its use to high-value or research-driven applications.

fiber lasers and amplifierssolid-state laser hostsphosphor materialsinfrared optical componentsrare-earth dopantshigh-temperature ceramics

Compliance & Regulations

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

Units:

si imperial

Property	Value	Unit	Conditions
Bulk Modulus(K)	24,164.7	ksi	DFT · OptB88vdW
Poisson's Ratio(ν)	0.3500	-	DFT · OptB88vdW
Shear Modulus(G)	10,557.3	ksi	DFT · OptB88vdW

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

Property	Value	Unit	Conditions	Source
Density(ρ)	0.3586	lb/in³	DFT · OptB88vdW

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

Filter by

Method

Carrier

Property	Value	Unit	Conditions
Band Gap(Eg)3 entries	4.530	eV	Measured
↳	1.456	eV	DFT · PBE
↳	4.194	eV	DFT · OptB88vdW
Dielectric Constant (Relative Permittivity)(εr)	18.58	-	DFT · OptB88vdW
High-Frequency Dielectric Constant (ε∞)(ε∞)	4.026	-	DFT · OptB88vdW
Magnetic Moment(μB)2 entries	0.000	μB	DFT
↳	0.000	µB	DFT · OptB88vdW
Piezoelectric Modulus(eij)	0.000	C/m²	DFT · OptB88vdW
Thermoelectric Power Factor(PF)2 entries	0.000738	W/(m·K²)	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	0.000498	W/(m·K²)	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Seebeck Coefficient(S)2 entries	-117.2	μV/K	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	410.3	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.

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

Filter by

Method

Property	Value	Unit	Conditions
Energy Above Hull(ΔEhull)	0.06000	eV/atom	DFT · OptB88vdW
Formation Energy(ΔHf)3 entries	-2.976	eV/atom	DFT
↳	-3.864	eV/atom	DFT · OptB88vdW
↳	-3.915	eV/atom	Measured

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.

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

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.

Tm2O3

Mechanical Properties

Physical Properties

Electrical Properties

Other Properties

Regulatory Screening

Environmental

Export Control