Korea Institute of Science and Technology

Beomjin Kwon

Ji-Won Choi

Chong Yun Kang

Seok Jin Yoon

Jin Sang Kim

Seung Hyub Baek

Seong Keun Kim

Chong-Yun Kang

Jin-Sang Kim

Seung-Hyub Baek

Seong-Keun Kim

Dow-Bin Hyun

Woo-Suk Jung

Im-Jun Roh

A method for manufacturing a thermoelectric material is provided. According to the method, a first shaped body is formed from a thermoelectric powder, of which a crystal has a layer structure. An extruded body is formed by extruding the first shaped body. A plurality of cut-off pieces are formed by cutting the extruded body along a cross-section perpendicular to an extrusion direction. A second shaped body is formed by stacking and pressing the cut-off pieces along a direction perpendicular to the extrusion direction. According to the above, a thermoelectric ability of a thermoelectric material and an efficiency for manufacturing a thermoelectric module may be improved.

Method for manufacturing thermoelectric material having high efficiency

Disclosed is a curved piezoelectric device maximizing an electrical potential of the piezoelectric material corresponding to an external mechanical stress. The curved piezoelectric device includes: a curved substrate; and a piezoelectric material provided on one surface or both surfaces of the curved substrate, wherein when a stress is applied, a neutral plane in which a compressive stress and a tensile stress are balanced is located in the curved substrate, wherein the location of the neutral plane is determined by yand yof Equation 1 or 2 below, and wherein the location of the neutral plane is controllable by adjusting a thickness (d), a sectional area (A) and a Young's modulus (E) of each of the curved substrate and the piezoelectric material: wherein 

Curved piezoelectric device

Growing community of inventors

Seoul, South Korea

Beomjin Kwon