Bi2Te3 — Properties & Data | MatWorld

Bi2Te3

semiconductor

· Bi2Te3

Bismuth telluride (Bi₂Te₃) is a narrow-bandgap semiconductor and the most widely used thermoelectric material at room temperature, prized for direct conversion between thermal and electrical energy. It is the material of choice for thermoelectric cooling modules, power generation from waste heat, and temperature sensing applications across industrial, automotive, and consumer electronics sectors. Engineers select Bi₂Te₃ over alternatives because of its superior figure of merit near ambient conditions, established manufacturing processes, and proven reliability in applications requiring precise thermal management without moving parts.

thermoelectric cooling moduleswaste heat power generationtemperature control systemsportable refrigerationthermal sensors and detectorsautomotive climate systems

Compliance & Regulations

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

Units:

Property	Value	Unit	Conditions	Source
Bulk Modulus(K)3 entries	2,218.1	ksi	—
↳	2,177.1	ksi	—
↳	4,557.1	ksi	—
Elastic Compliance Tensor(Sij)	Matrix (redacted)	1/GPa	—
Elastic Anisotropy(AU)	3.729	-	—
Elastic Stiffness Tensor(Cij)	Matrix (redacted)	ksi	—
Exfoliation Energy(Eexf)	250.8	meV/atom	—
Poisson's Ratio(ν)2 entries	0.2049	-	—
↳	0.2500	-	—
Shear Modulus(G)3 entries	1,629.5	ksi	—
↳	1,573.9	ksi	—
↳	3,041.4	ksi	—

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
Thermal Conductivity(k)2 entries	2.321	BTU/(hr·ft·°F)	—
↳	2.321	BTU/(hr·ft·°F)	27°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
Density(ρ)	0.2823	lb/in³	—

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

Property	Value	Unit	Conditions	Source
Band Gap(Eg)2 entries	0.2500	eV	—
↳	0.000	eV	—
Dielectric Constant (Relative Permittivity)(εr)	115.6	-	—
Electrical Conductivity(σ)	2,222.2	S/cm	27°C
Electrical Resistivity(ρe)	0.00000450	Ω·m	27°C
Magnetic Moment(μB)	0.000	µB	—
Piezoelectric Modulus(eij)	0.000	C/m²	—
Thermoelectric Power Factor(PF)	0.00673	W/(m·K²)	27°C
Seebeck Coefficient(S)2 entries	-174	μV/K	27°C
↳	-180.8	µV/K	—
Thermoelectric Figure of Merit(zT)	0.5025	-	27°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)	0.2469	eV/atom	—
Formation Energy(ΔHf)2 entries	-0.1631	eV/atom	—
↳	0.00814	eV/atom	—

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

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.