Raman spectroscopy study of the phase transitions in Pb_0.99Nb_0.02[(Zr_0.57Sn_0.43)_1−yTi_y]_0.98O₃ceramics

Abstract

Detailed studies of the phase transitions in Pb 0.99 Nb 0.02 [(Zr 0.57 Sn 0.43 ) 1−y Ti y ] 0.98 O 3 (y = 0.03, 0.04, 0.05, 0.06, 0.07, 0.08, 0.10, and 0.12) ceramics as a function of composition, temperature, electric field, and time were conducted using Raman spectroscopy. At room temperature, the as-sintered ceramics with y = 0.03-0.08 show an antiferroelectric order while those with y = 0.10 and 0.12 show a ferroelectric order. For the ceramic with y = 0.08, however, a ferroelectric order can also be stabilized at room temperature when it is warmed up from lower temperatures. The electric field-induced ferroelectric phase in the ceramic with y = 0.07 is metastable at room temperature and ages back to the stable antiferroelectric phase on a timescale of hours.

Electric-field-induced antiferroelectric to ferroelectric phase transition in mechanically confinedPb0.99Nb0.02[(Tan1, Frederick2, Ma3 et al. 2010Phys. Rev. B732540View full textAdd to dashboardCite

“…6 After sintering, two types of samples were prepared. For the uniaxial prestress test, a disk sample with diameter of 7.0 mm and thickness of 1.0 mm was prepared with cutting, polishing, and lapping.…”

“…[1][2][3][4][5][6] Such a phase transition can even be realized with the intrinsic interfacial field in very thin antiferroelectric films. 7 On the other hand, certain ferrroelectric ceramics can be depolarized and transformed into an antiferroelectric phase by hydrostatic pressures or uniaxial compressive stresses.…”

Thermal analysis of phase transitions in perovskite electroceramics

“…Lead-based antiferroelectrics that demonstrate a remarkably high energy storage density have been developed in the effort to bridge the gap between power density and energy density [2][3][4]. This is achieved through a reversible electrically induced phase transition between an antiferroelectric phase and a ferroelectric phase, resulting in the sudden development of high electrical polarization at the critical field of the phase transition [5][6][7][8][9][10][11]. During unloading of the capacitor, a large amount of electrical energy is released as the dielectric material reverts to an antiferroelectric state [2][3][4].…”

“…In simple terms, the dielectric properties of these materials are nonlinear with changing electric fields, and the utilization of nonlinear dielectrics in capacitors has the potential to create very high energy densities as long as sufficiently high electric fields are applied [4]. Of all the antiferroelectric ceramics the most widely studied compositions are lead zirconate titanate stannate doped with minor amounts of niobium or lanthanum [5][6][7][8][9][10][11]. In particular, Pb 0.99 Nb 0.02 [(Zr 0.57 Sn 0.43 ) 1-y Ti y ] 0.98 O 3 (PNZST43/100y/2) shows promise for applications in high energy density capacitors because its antiferroelectric-ferroelectric transition can be easily manipulated and tuned [12,13].…”

Auxetic behavior under electrical loads in an induced ferroelectric phase

“…11 Pb 0.99 Nb 0.02 ͓͑Zr 0.57 Sn 0.43 ͒ 0.94 Ti 0.06 ͔ 0.98 O 3 ͑PNZST43/6/2͒ in the form of bulk ceramic pellets was prepared according to the procedure described previously. 16 The sintered pellet was ground to a cylinder with a diameter of 7 mm, and thin slices were then cut from the cylindrical pellet with a wire saw. After polishing and lapping, whole circular faces of the disk samples were electroded with Ag films by sputtering.…”