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The Effect of Poling on the Properties of 0.65Pb(Mg 1/3 Nb 2/3 )O 3 –0.35PbTiO 3 Ceramics

2011; Institute of Physics; Volume: 50; Issue: 3R Linguagem: Inglês

10.1143/jjap.50.035801

1347-4065

Hana Uršič, Jenny Tellier, Marko Hrovat, Janez Holc, Silvo Drnovšek, V. Bobnar, Miguel Algueró, Marija Kosec,

Acoustic Wave Resonator Technologies

The effects of the poling field on the structural and electrical properties of 0.65Pb(Mg 1/3 Nb 2/3 )O 3 –0.35PbTiO 3 (0.65PMN–0.35PT) ceramics were investigated. The highest piezoelectric coefficient d 33 , coupling coefficients k p , k t , and mechanical quality factor Q m were achieved for ceramics poled at electric fields between 2 and 3.5 kV/mm, whereas the d 33 , k p , k t , and Q m of ceramics poled at higher electric fields, i.e., 4 and 4.5 kV/mm, were lower. The non-poled ceramics contained 86% of the monoclinic phase with the space group P m and 14% of the tetragonal phase with the space group P 4 m m . However, the ceramics poled at 2.5 kV/mm contained 99% of the monoclinic phase and the rest is the tetragonal phase. The results show that the ratio of the monoclinic to the tetragonal phases can be changed by the application of a poling electric field and that the extent of this change is dependent on the field strength.