Results 171 to 180 of about 1,062 (203)

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
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Hydrothermal Synthesis of Sodium Potassium Bismuth Titanates

Ferroelectrics, 2015
(Bi0.5Na0.5)TiO3 (BNT) is an excellent candidate lead-free piezoelectric material system. This study prepares BNT ceramics using the hydrothermal method at 180°C with an NaOH concentration of 12 M. The effect of potassium content on the crystal structure of the ceramics is studied.
Yung-Der Juang, H. T. Kuo
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Fabrication of Textured Bismuth Sodium Titanate Using Excess Bismuth Oxide

Japanese Journal of Applied Physics, 2005
Bi0.5Na0.5TiO3 (BNT) bulk ceramics with a preferred <100> orientation (texture) were prepared by the reactive-templated grain growth method using platelike Bi4Ti3O12 (BiT) particles as templates for BNT. The texture did not develop extensively in stoichiometric BNT, but the addition of excess Bi2O3 to BNT enhanced the texture development. The
Toshio Kimura, Eiichiro Fukuchi, Toshihiko Tani   +2 more
openaire   +1 more source

Influence of carbon nanotubes on the performance of bismuth sodium titanate-bismuth potassium titanate-barium titanate ceramic/cement composites

Ceramics International, 2017
Abstract Lead-free bismuth sodium titanate-bismuth potassium titanate-barium titanate ceramic/cement composites with carbon nanotubes (CNTs) addition were developed for smart structures application. The pores in composite and insulating nature of the cement matrix made the poling difficult and lower piezoelectric activities of composites.
Ruamporn Potong, Rattiyakorn Rianyoi, Athipong Ngamjarurojana, Arnon Chaipanich   +3 more
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Sodium Bismuth Titanate-Based Ceramics

2011
Dielectric, ferroelectric, and piezoelectric properties including phase transition temperatures of perovskite-type bismuth sodium titanate, (Bi1/2Na1/2)TiO3 [BNT]-based lead-free piezoelectric ceramics have been reviewed from the results obtained by our group being superior candidates for lead-free piezoelectric materials to reduce environmental damage.
Tadashi Takenaka, Hajime Nagata
openaire   +1 more source

ELECTROMECHANICAL CHARACTERIZATION OF LANTHANUM-DOPED SODIUM BISMUTH TITANATE CERAMICS

Modern Physics Letters B, 2006
The effect of lanthanum doping on the electromechanical properties of lanthanum-doped sodium bismuth titanate was studied. The ferroelectric system under investigation was Na 1/2( La x Bi 1-x)1/2 TiO 3 ceramics, with x=0, 0.1, 0.15 and 0.2. Admittance measurements were carried out in the frequency range of 100 Hz to 13 MHz and in the temperature range
Aparna, M., Raghavender, M., Prasad, G., Kumar, G. S.   +3 more
openaire   +2 more sources

Structural and electrical properties of bismuth magnesium titanate substituted lead-free sodium bismuth titanate ceramics

Journal of Materials Science: Materials in Electronics, 2016
Bismuth magnesium titanate substituted sodium bismuth titanate lead-free piezoceramics are synthesized by solid state reaction method up to x = 0.06 mole fraction. Samples are poled and influence of substitution on poled ceramics is studied. Dielectric, ferroelectric and piezoelectric properties are analyzed in relation with intrinsic parameters strain
D. E. Jain Ruth, M. Muneeswaran, N. V. Giridharan, B. Sundarakannan   +3 more
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Field-induced strain behavior for potassium sodium bismuth titanate ceramics

IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 2007
Data are reported for the dielectric, piezoelectric, electrostrictive, and ferroelectric properties of potassium-substituted sodium bismuth titanate, [(K(x)Na(1-x))(0.5)Bi(0.5)]TiO3. For the morphotropic phase boundary composition x = 0.2, relaxor-type behavior was observed at room temperature with piezoelectric (effective d(333) = 325 x 10(-12) m/V ...
James F, Carroll, David A, Payne, Yuji, Noguchi, Masaru, Miyayama   +3 more
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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
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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