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Thermoelectric cooling and bismuth telluride materials

As a reliable active refrigeration method, thermoelectric refrigeration has the characteristics of no moving parts, no noise, and easy integration, which attracts much attention in the field of thermal design. In addition, it can directly control the cooling or heating temperature by adjusting the input voltage and current, making the thermoelectric refrigeration technology particularly important for the cooling object of accurate temperature control. Thermoelectric refrigeration technology mainly involves the basic theory of thermoelectric conversion, thermoelectric materials, and the application of thermoelectric refrigeration. Pre-commercial thermoelectric refrigeration modules are mostly π-type modules composed of bulk thermoelectric materials. Thermoelectric refrigeration modules are thermocouple assemblies consisting of N-pairs of P-type and N-type semiconductor components connected in series by electrodes. These thermocouples are embedded between two insulating substrates. P – and N-type components are usually the same size to facilitate commercial processing. Usually, commercial thermoelectric materials add bismuth selenide and antimony telluride to form a solid solution alloy for bismuth telluride. It was found that the ZT values of N-type samples with an annealing process and P-type models without an annealing process were higher, and the peak ZT values were 1.13 and 1.19, respectively. If you are looking for high quality, high purity and cost-effective bismuth telluride, or if you require the latest price of bismuth telluride, please feel free to email contact mis-asia.

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