Pyroelectric properties of Mn-doped 94.6Na0.5Bi0.5TiO3-5.4BaTiO3 lead-free single crystals

Abstract

Articles you may be interested inComplete set of material constants of 0.95(Na0.5Bi0.5)TiO3-0.05BaTiO3 lead-free piezoelectric single crystal and the delineation of extrinsic contributions Enhanced ferroelectric and piezoelectric properties in doped lead-free ( Bi 0.5 Na 0.5 ) 0.94 Ba 0.06 TiO 3 thin films Appl. Phys. Lett. 97, 212901 (2010); 10.1063/1.3518484 Macroscopic and nanoscale electrical properties of pulsed laser deposited (100) epitaxial lead-free Na 0.5 Bi 0.5 TiO 3 thin filmsWe investigated the pyroelectric properties of h001i, h110i, and h111i-oriented Mn doped 94.6Na 0.5 Bi 0.5 TiO 3 -5.4BaTiO 3 (94.6NBT-5.4BT) crystals. Among the above three crystallographic orientations, the h111i-oriented crystals possess the highest pyroelectric coefficients and the largest figures of merit. At 20 C, the values of p, F v , and F d reach as high as 5.88 Â 10 À4 C/m 2 K, 29.8 lPa À1/2 , and 0.08 m 2 /C for h111i-oriented crystals, respectively, which are superior to other lead-free ferroelectric materials. The crystals also demonstrate a high depolarization temperature and relatively stable thermal pyroelectric property. These results indicate the potential of Mn-doped 94.6NBT-5.4BT crystals for lead-free infrared pyroelectric detectors. V C 2014 AIP Publishing LLC.

Enhanced piezoelectric properties of Mn‐modified Bi5Ti3FeO15 for high‐temperature applications

“…We aim to verify the piezoelectricity of unmodified BTF and to increase the piezoelectric performance of BTF by element doping, as the composition adjustment is a traditional approach to improve the piezoelectric properties of BLSFs . As known, the addition of manganese cations can effectively increase the piezoelectric performance of perovskite‐structure oxides and BLSFs, thus, we chose manganese cations as modifiers. In addition to the excellent piezoelectric performance, for the applications of high‐temperature piezoelectric materials, thermal stabilities of their electrical properties are equally important for high‐temperature operations .…”

Effect of Structural Modification by MnO2Addition on the Electrical Properties of Lead Free Flux Grown (Na0.5Bi0.5)TiO3–(K0.5Bi0.5)TiO3Single Crystals

“…The dielectric response of the electrode BNKMT single crystal over the heating run from room temperature to 500°C is shown in Figure 3a. The first hump observed at 175°C, with clearly distinguishable broad 25,10 Moreover, the diffuseness of the complex perovskite relaxor is sensitive to the degree of compositional fluctuation at the B-site ion, as a result of which frequency dispersion around permittivity maximum becomes less apparent. Figure 3b shows the dielectric loss study for the BNKMT single crystal.…”

“…However, these binary systems still suffer from the problems of depolarization temperature, T d , which limits their wide working temperature range for capacitor and piezoelectric applications, and hence it is required to increase the T d value. K.-S. Moon 10 Because of high T c value of KBT, a binary system of NBT−KBT was chosen in this manuscript as it is expected to increase the T d value for the grown single crystals.…”

Structural, ferroelectric and dielectric properties of Na0.5Bi0.5(Ti0.98Fe0.02)O3 thin films on different substrates

“…The NBT is known to exhibit strong ferroelectric property with large polarization (P r = 38 lC/cm 2 ) [1]. During last decade, the related performances including piezoelectric, pyroelectric, high leakage and so on, have been studied widely [2][3][4][5]. For the case of thin film form, it is suitable for integration on substrates used in the microelectronic industry.…”