Material Bismuth telluride
Bismuth telluride is a thermoelectric compoud of tellurium and bismuth. Thermoelectric materials are those which exhibit a Peltier effect (see glossary).

It is a semiconductor, usually doped both positively (deficency of electrons) and negatively (excess of electrons) for increasing its thermoelectric power.

Since its thermoelectric power is remarkable especially between -10 and 130 C, the material suits most thermoelectric cooling applications.
Products Can cooler
Food plate
Lorry refrigerator
Hotel minibar
Similar materials Thermoelectric materials
Bismuth
Tellurium
References Johnson Matthey GmbH
SupercoolTM
International Thermoelectric Inc.
Price Very pure powder purchased in small amounts (less than 1kg) are very expensive. Prices vary from 5,000 to 10,000 DKK/kg, according to the quantities. Supposedly, for larger order the price can be lower.
Photo Thomas Nissen (Computer graphics)
Copyright © 1998 Torben Lenau