Abstract
We have targeted the synthesis of a series of (Bi/sub 2/Te/sub 3/)/sub X/(SnTe)/sub Y/ misfit layer compounds to study their potential as thermoelectric materials. Misfit layer compounds generally contain interwoven blocks of compounds (typically dichalcogenides) with a rock salt structure; an example is (PbSe)/sub 1.10/(NbSe/sub 2/). The lattice mismatch between the alternating layers is expected to decrease lattice thermal conductivity by increasing phonon scattering. Attempted misfit layer compounds of (Bi/sub 2/Te/sub 3/)/sub X/(SnTe)/sub Y/ have been prepared with 2<X<10 and 2<Y<11 using the modulated elemental reactant method. The misfit layer structure was not formed, however, due to interdiffusion of layers occurring faster than crystallization on annealing at 200/spl deg/C.
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