Results 181 to 190 of about 3,555 (211)

Hydrothermal Synthesis of Sodium and Potassium Bismuth Titanates

Chemistry of Materials, 2000
A thermodynamic model of electrolyte solutions has been used as a tool for equilibrium calculations in the Na−Bi−Ti−H2O and K−Bi−Ti−H2O systems. To perform the calculations, unknown standard-state properties for Na0.5Bi0.5TiO3 (NBT), K0.5Bi0.5TiO3 (KBT) and other solid compounds that exist in these systems were established.
Malgorzata M. Lencka, Magdalena Oledzka, Richard E. Riman   +2 more
openaire   +1 more source

Sodium-bismuth titanate based lead-free ferroelectric materials

Journal of the European Ceramic Society, 2004
Abstract In search of lead-free ferroelectric ceramics with improved properties, an investigation was carried out on barium and strontium-modified Na0.5Bi0.5TiO3 (NBT) ceramics. Many compositions among the Ba and Sr-modified ceramic materials exhibit diffuse phase transition and are characterised by a strong temperature and frequency dispersion of ...
Gomah-Pettry, J, Saïd, Senda, Marchet, Pascal, Mercurio, Jean-Pierre   +3 more
openaire   +2 more sources

Optical properties of sodium bismuth titanate thin films

Ferroelectrics, 2017
ABSTRACTWe have investigated the optical and microwave dielectric properties of lead-free perovskite ferroelectric Na0.5Bi0.5TiO3 (NBT) thin films deposited on fused silica substrate using pulsed laser deposition at different substrate temperatures.
Andrews Joseph, Sivanagi Reddy Emani, K. C. James Raju   +2 more
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Electromechanical Characterization of Lanthanum Doped Sodium Bismuth Titanate Ceramics

Ferroelectrics, 2005
The effect of lanthanum doping is studied on electromechanical properties of lanthanum doped sodium bismuth titanate. The ferroelectric system under investigation is Na1/2 (La x Bi 1−x )1/2 TiO3 ceramics, with x = 0, 0.1, 0.15 and 0.2. Dielectric and impedance studies have been carried out in the temperature region ranging from room temperature to 550 ...
M. Aparna, G. Prasad, G. S. Kumar
openaire   +1 more source

Structural Optimization of Bismuth Sodium Titanate Thin Films

Ferroelectrics, 2015
Lead-free ferroelectric oxide materials have attracted considerable attention from the environmental viewpoint. Among lead-free piezoelectric materials, bismuth sodium titanate (Bi0:5Na0:5TiO3) is considered to be one of the excellent candidates.
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Lower-temperature sintered high energy density fine-grained sodium bismuth titanate - strontium bismuth titanate ceramics multilayer capacitors

Ceramics International
Huiqing Fan
exaly   +2 more sources

Phase transitions and soft modes in sodium bismuth titanate

Ferroelectrics, 1985
Abstract The results of experimental studies of the crystal and domain structures of NaO, 5BiO, 5TiO3 as well as its lattice dynamics, dielectric, optical and other physical properties are considered. Nature of peculiar temperature points is discussed.
S. B. Vakhrushev, V. A. Isupov, B. E. Kvyatkovsky, N. M. Okuneva, I. P. Pronin, G. A. Smolensky, P. P. Syrnikov   +6 more
openaire   +1 more source

SYNTHESIS AND CHARACTERIZATION OF LANTHANUM DOPED SODIUM BISMUTH TITANATE

Modern Physics Letters B, 2002
Impedance spectroscopic studies on polycrystalline sintered discs of lanthanum doped Na 1/2( La x Bi 1-x)1/2 TiO 3 ceramics with x = 0, 0.1, 0.15 and 0.2, have been carried out in the temperature region ranging from room temperature to 550°C and in the frequency range of 100 Hz to 1 MHz. Impedance data is presented in frequency explicit plots and Cole–
M. APARNA, T. BHIMASANKARAM, G. S. KUMAR, G. PRASAD   +3 more
openaire   +1 more source

Characteristics of yttrium substituted sodium bismuth titanate thin films

Materials Letters, 2010
Abstract Sodium bismuth titanate (NBT) thin films substituted with yttrium for Na site were prepared by a modified sol–gel processing and their dielectric properties were investigated. The stability of perovskite structure was highly affected by the amount of Y substitution and the annealing temperatures. Y substituted NBT thin films post-annealed at
Dong Heon Kang, Byung Soo Lee, Hee Kwon An, Young Ho Kim, Dong Soo Paik, Hak In Hwang, Nam Kyu Cho   +6 more
exaly   +2 more sources

Superlattice in single crystal barium-doped sodium bismuth titanate

Journal of Physics and Chemistry of Solids, 2000
Abstract Na 1/2 Bi 1/2 TiO 3 (NBT) doped with BaTiO 3 (BT) has recently shown promising piezoelectric properties in single crystal form. The piezoelectric properties appear to be highly dependent on BT concentration, with compositions close to the morphotropic phase boundary (∼6% BT) having the highest piezoelectric coefficients.
A.N Soukhojak, H Wang, G.W Farrey, Y.-M Chiang   +3 more
openaire   +1 more source