TmB2 — Properties & Data | MatWorld

TmB2

Name: TmB2
Brand: MatWorld

ceramic

· TmB2

Thulium diboride (TmB2) is an ultra-high-temperature ceramic compound belonging to the hexagonal boride family, characterized by strong covalent bonding between thulium and boron atoms. While primarily a research material rather than a widely commercialized engineering ceramic, TmB2 is investigated for extreme thermal environments and wear-resistant applications where conventional ceramics fall short; the rare-earth boride family shows promise for hypersonic vehicle components, thermal protection systems, and cutting tool coatings where superior hardness and refractory properties are needed at temperatures exceeding typical alumina or silicon carbide limits.

hypersonic vehicle thermal protectionultra-high-temperature coatingsadvanced cutting toolswear-resistant applicationsresearch and development materialshigh-temperature structural ceramics

Compliance & Regulations

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

Units:

si imperial

Property	Value	Unit	Conditions
Bulk Modulus(K)	177.9	GPa	DFT · OptB88vdW
Poisson's Ratio(ν)	0.1500	-	DFT · OptB88vdW
Shear Modulus(G)	165.6	GPa	DFT · OptB88vdW

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

Property	Value	Unit	Conditions	Source
Density(ρ)	9.132	kg/m³	DFT · OptB88vdW

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

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Method

Carrier

Property	Value	Unit	Conditions
Band Gap(Eg)2 entries	0.000	eV	DFT · OptB88vdW
↳	0.000	eV	DFT · TBmBJ
Magnetic Moment(μB)	0.000	µB	DFT · OptB88vdW
Thermoelectric Power Factor(PF)2 entries	0.000216	W/(m·K²)	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	0.000226	W/(m·K²)	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Seebeck Coefficient(S)2 entries	-6.080	μV/K	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	-6.213	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

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Method

Property	Value	Unit	Conditions
Energy Above Hull(ΔEhull)	0.000	eV/atom	DFT · OptB88vdW
Formation Energy(ΔHf)2 entries	-0.6886	eV/atom	DFT · OptB88vdW
↳	-0.3171	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

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.

TmB2

Mechanical Properties

Physical Properties

Electrical Properties

Other Properties

Regulatory Screening

Environmental