Estimation of energy density of PMN-PT ceramics utilizing mechanical stress

Abstract

Present study introduces an indirect measurement of energy density of (1-x)Pb(Mg_1/3Nb_2/3)O₃-(x)PbTiO₃ (PMN-PT) ceramics under compressive stress and electric field. The method works analogous to Olsen cycle which is a demonstration of a novel cycle converting mechanical energy into electrical energy. A large amount of electro-mechanical energy conversion can be achieved via this method. The ceramics were investigated under 0–75 MPa and 1–15 kV/cm of applied mechanical stress and electric field, respectively. A maximum energy density of 68 kJ/m³/cycle was achieved in 0.7PMN-0.3PT ceramic. The obtained result is significantly greater than that of linear piezoelectric phenomena.

Keywords:

• Olsen cycle
• energy density
• energy conversion
• piezoelectric material
• PMN-PT ceramic

Acknowledgment

MU and SU acknowledge Rajamangala University of Technology Isan for financial supports.