TB Nord produces generating modules assembled from Bi2Te3 - Sb2Te3 materials in two variants:
- with application of tin solder – 230 °C m.p.t
- with application of solder containing Pb – 280 °C m.p.t
♦ Modules are fabricated from temperature optimized thermoelectrical materials.
♦ Multilayers diffusion barriers provide exclusively small temperature degradation of modules during exploitation at high temperatures up to 150 °C.
♦ Application of H - technology diffusion barriers is used to get small degradaion of modules during exploitation at temperatures up to 230 °C (see chapter Slices)
♦ Layers of elastic compound introduced between substrates and semiconductor dices effectively reduce thermo-mechanical stresses arisen at big temperature gradient in modules.♦ Cathaphoretic coating - AnticorThermoPlus - provides protection of all conductive parts inside modules against oxidation.
Specialists of Technological Bureau NORD in collaboration with technologists of affiliated Company RusTec LLC discovered feature of P-type which is important for TE generators performance at temperature above 1200C. Read more in article "Investigating the Performance of Bismuth-Antimony Telluride" by authors Z.Dashevsky, S.Skipidarov.
For the module marking we normally use the following index.
MTG-XXX-YY-ZZ MHCS, where
MTG – module thermoelectric generating
XXX – number of couples
YY – side size of dice in mm
ZZ – dice hight in mm
M – glued technology if such technilogy is applied
H – if H- technilogy of diffusion barriers is applied
C – application of Anticor Thermo Plus coating
S – application of sealing around perimeter