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Bismuth Telluride | Bi2Te3 | CAS 1304-82-1


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Bismuth Telluride (Bi2Te3) is a narrow gap layered semiconductor with high thermal conductivity. Heeger Materials can provide the best Bismuth Telluride (Bi2Te3) with a purity of 99.99% and 99.999% in size of lump and powder. The size can be customized. HM offers a selection of over 100 high-purity products, including metals, metal oxides, and metal salts, with 99.999% purity or higher. 

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Data sheet

Purity99.99%-99.999% (4N-5N)
ProductBismuth telluride

More info

Bismuth Telluride (Bi2Te3) is a semiconductor that is alloyed with antimony (P-Type Bismuth Telluride) or selenium (N-Type Bismuth Telluride) as a highly efficient thermoelectric material for refrigeration or portable power generation. Topological insulator surface states have been observed in bismuth telluride.

Bismuth Telluride | Bi2Te3 | CAS 1304-82-1

High-purity and ultra-high purity Bismuth Telluride (Bi2Te3) materials are crucial components for the research, development, and production of advanced technologies that require optimum properties, performance, and quality.

  • Chemical formula: Bi2Te3
  • CAS#: 1304-82-1
  • EINECS NO.: 215-135-2
  • Molar mass: 800.76 g/mol
  • Appearance: grey powder
  • Density: 7.74 g/cm3
  • Melting point: 580 °C (1,076 °F; 853 K)
  • Solubility in water: insoluble
  • Solubility in ethanol: soluble
  • Crystal structure: Trigonal, hR15
  • Hazardous Class: Class 6.1

P-Type Bismuth Telluride and N-Type Bismuth Telluride Specifications







Production process

Powder metallurgy

Zone melting and pulling process

Seebeck coefficient

205-210 (α, μV/K)

210-230 (α, μV/K)

Electrical resistivity

1.0 (ρμΩ·cm)

1.0 (ρμΩ·cm)


950-1050 (σ, S/cm)

950-1050 (σ, S/cm)

Thermal conductivity

~1.3 (W/m·K)

~1.65 (W/m·K)

ZT Value




Ingot, granule, and powder (The size can be customized.)

Ingot, granule, and powder (The size can be customized.)

Bismuth Telluride Product List


  • Used to manufacture thermoelectric generators and other related devices.
  • Used in the fields of optoelectronic devices, thermistors, transparent electrodes, and others.


Bismuth Telluride (Bi2Te3) is carefully packaged in carton boxes with foam protection to minimize damage during storage and transportation and to preserve the quality of our products in their original condition. The vacuum packing is 1kg/bag, 25kg/barrel, or based on specific requirements.

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