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CERAMIC MATERIAL

The ceramic material used in the construction of the thermoelectric cooler can be chosen to optimize the performance of the cooler design. The ceramic materials exhibit unique attributes that may be beneficial in some applications and not in others. The thermoelectric coolers are typically constructed of three types of ceramic materials; Alumina, Beryllia, and Aluminum Nitride. A thermoelectric cooler need not be constructed out of the same ceramic material for both the top and base. For instance, you may chose to use Beryllia on the top for better heat spreading and Alumina on the base for a better thermal match to your package. Although these materials have demonstrated reliable performance in thermoelectric applications, other materials may be available to meet your specific needs. Contact Marlow engineering to determine your material options, or simply fill out the applications questionnaire, and you will receive detailed results of the thermoelectric cooler configuration that matches your requirements.

The table below compares some of the ceramic material attributes.

 

Attribute
Alumina
Beryllia
Aluminum Nitride
Symbol
AlO or Al2O3
BeO
AlN
Thermal Conductance
26 W/m-K
248 W/m-K
170 W/m-K
Coefficient of Thermal Expansion
6.2 µm/m-°C
9.0 µm/m-°C
4.2 µm/m-°C
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