Results 131 to 140 of about 684 (175)

Hydrothermal Synthesis of Sodium Bismuth Titanate Ferroelectrics

Inorganic Materials, 2020
We have studied phase formation processes during sodium bismuth titanate, Na0.5Bi0.5TiO3 (NBT), synthesis under hydrothermal conditions at a temperature of 230°C for 24 and 48 h using stoichiometric mixtures of titanium oxide and bismuth hydroxide and NaOH solutions in the concentration range 5–30 M.
E. A. Reshetnikova, I. V. Lisnevskaya, A. I. Terekhin   +2 more
openaire   +1 more source

Preparation and Properties of Lead Free Bismuth Sodium Titanate−Bismuth Zinc Titanate Ceramics

Ferroelectrics, 2009
Lead-free piezoelectric ceramics based on (1–x)Bi 1/2 Na 1/2 TiO 3 – x Bi(Zn 1/2 Ti 1/2 )O 3 (x = 0.0, 0.02, 0.04, 0.06, 0.08, 0.10, 0.20, 0.30, 0.40, and 0.5) were obtained via solid-state processing techniques. The influence of BZT addition on BNT characteristics, sintering, microstructure and properties was investigated.
Rangson Muanghlua, Surasak Niemcharoen, Wanwilai C. Vittayakorn, Nattapong Tungsitvisetkul, Pimjan Chinwaro, Anucha Ruangphanit, Nopsiri Chaiyo, Naratip Vittayakorn   +7 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
openaire   +1 more source

Peculiarities of phase transitions in sodium-bismuth titanate

Ferroelectrics, 1980
Abstract The ferroelectric properties of (Na0,5Bi0,5TiO3) single crystals are studied. It is found that some physical characteristics possess a large temperature hysteresis in the temperature range 200 – 300°C. The nature of that hysteresis is discussed.
I. P. Pronin, P. P. Syrnikov, V. A. Isupov, V. M. Egorov, N. V. Zaitseva   +4 more
openaire   +1 more source

Ferroelectric properties of strontium, sodium and bismuth titanates

Journal of Physics D: Applied Physics, 1980
The conditions of calcination and firing in the solid solutions Srx(Na0.5Bi0.5)1-xTiO3 ...
J P Cavalier, M Troccaz, Y Fetiveau
openaire   +1 more source

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

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
openaire   +1 more source

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

Combustion technique synthesis of lead-free piezoelectric bismuth sodium titanate-bismuth potassium titanate–barium titanate ceramics

Integrated Ferroelectrics, 2016
ABSTRACTFabrication of lead-free piezoelectric ceramic bismuth sodium titanate–bismuth potassium titanate–barium titanate, focusing on the morphotropic phase boundary (MPB) between the rhombohedral and tetragonal phases was studied. a[0.935(Bi0.5Na0.5)TiO3-0.065BaTiO3]-(1-a)[0.8(Bi0.5Na0.5)TiO3-0.2(Bi0.5K0.5)TiO3]; BNBK ceramics with 0 ≤ a ≤ 1 were ...
Atthakorn Thongtha, Theerachai Bongkarn
openaire   +1 more source

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