Effects of Manganese Oxides/Gold Composite Electrode on Piezoelectric Properties of Lead Magnesium Niobate Titanate Single Crystal

Abstract

We have confirmed a high dielectric constant after poling ε33 T/ε0 of 7700 and piezoelectric constant d 33 = 2250 pC/N, which are 40% larger than those of the initial sample, for a lead magnesium niobate–lead titanate 0.72 Pb(Mg1/3Nb2/3)O3–0.28 PbTiO3 single crystal plate with a manganese oxide/gold (Au) composite electrode. The increased ε33 T/ε0 and d 33 may be attributable to the smaller domains realized by fine patterning semiconductor manganese oxide and conductive Au composite electrodes on the single crystal plate. The use of a semiconductor/conductor composite electrode is an effective method of improving the properties of piezoelectric single-crystal transducers.

High performance ferroelectric relaxor-PbTiO3 single crystals: Status and perspective

“…In engineered domain configurations, relaxor-PT crystals are found to possess high piezoelectric coefficients, owing to the easy tilt of spontaneous polarization by applying electric field along non-polar directions. Other approaches, such as domain wall engineering using patterning electrodes or special poling process, are also found to increase the piezoelectric activity with increasing domain wall densities (decreasing domain sizes) in BaTiO 3 or PMN-PT crystals, 30,[41][42][43] due to the extrinsic contribution from the domain wall motion. e. Aging behavior and piezoelectric nonlinearity.…”

Engineering Domain Variants in 0.7Pb(Mg1/3Nb2/3)−0.3PbTiO3 Single Crystals Using High‐Frequency AC Poling

“…Investigation of relaxor-ferroelectric solid solutions of (1x)Pb(Mg 1/3 Nb 2/3 )-xPbTiO 3 (PMN-xPT) has been a focal point increased density of domain walls for an enhanced piezoelectric response of PMN-PT (more than three times). [1,20] Additionally, composite electrode patterning has also been demonstrated to improve the piezoelectric performance of PMN-PT single crystals by 30% with a detailed investigation of the induced varied domain structures evolving under an electric field. [21] Recently, an emerging alternate current (electric field) poling (ACP) approach, in a low-frequency regime between 0.01 and 100 Hz, has been proven to be an effective and time-saving method to engineer the domains of PMN-xPT, and a 20-40% enhancement in the dielectric and piezoelectric properties respectively, has been realized in comparison to the conventional DCP method.…”

“…[ 9,15–19 ] For the extrinsic case, direct current (electric field) poling (DCP) is normally used to obtain an increased density of domain walls for an enhanced piezoelectric response of PMN‐PT (more than three times). [ 1,20 ] Additionally, composite electrode patterning has also been demonstrated to improve the piezoelectric performance of PMN‐PT single crystals by 30% with a detailed investigation of the induced varied domain structures evolving under an electric field. [ 21 ]…”

Microstructure observation of Pb(Mg1/3Nb2/3)O3-PbTiO3 single crystals by scanning electron microscopy

“…6) In recent decades, relaxor-ferroelectric SCs in the morphotropic phase boundary (MPB) region have attracted considerable attention due to their superior piezoelectric properties. [7][8][9][10] The excellent piezoelectric properties of a large piezoelectric coefficient (d 33 > 2000 pC N −1 ) and a longitudinal bar mode electromechanical coupling factor (k 33 > 90%) along the [001] axis have been reported for Pb(Zn 1/3 Nb 2/3 )O 3 -PbTiO 3 (PZN-PT) and Pb(Mg 1/3 Nb 2/3 )O 3 -PbTiO 3 (PMN-PT) binary SCs and Pb(In 1/2 Nb 1/2 )O 3 (PIN)-PMN-PT ternary SCs near the MPB prepared using the conventional DC poling (DCP) method. [11][12][13][14][15][16][17] The DCP method has been widely used for piezoelectric materials since 1950.…”