Crystalline structure and mechanical properties of Bi/sub 2/Te/sub 3/-based profiled crystals grown by direct crystallization method

Abstract

Crystalline structure peculiarities of Bi/sub 2/Te/sub 3/-based thermoelectric materials grown in the form of flat plates by the direct crystallization method are examined. Values of the critical parameter (G/V)/sub cr/ under which the structure perfection of growing crystals becomes poor are estimated. Experimental results of mechanical tension, compression and bending tests carried out in different crystallographic orientations are presented. It is shown that the mechanical characteristics of materials are closely connected with crystalline structure.