Results 21 to 30 of about 712 (189)

Broadband Brillouin scattering study of ferroelectric instability of barium sodium niobate

Condensed Matter Physics, 2022
The barium sodium niobate (BNN) with tungsten-bronze structure is one of well-known optical crystals for electro-optic and nonlinear optic applications. This paper reviews the ferroelectric instability of BNN crystals.
S. Kojima
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Growth and Structure of Strong Pockels Material Strontium Barium Niobate on SrTiO3 and Si by Molecular Beam Epitaxy

Advanced Photonics Research, 2021
Strontium barium niobate (Sr x Ba1–x Nb2O6, referred to as SBN) is a material of interest for making efficient optical modulators due to its very high electro‐optic (EO or Pockels) coefficient.
Ilya M. Beskin, Sunah Kwon, Agham B. Posadas, Moon J. Kim, Alexander A. Demkov   +4 more
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Interdependence between electrical and magnetic properties of polycrystalline cobalt-substituted tungsten bronze multiferroic ceramics [PDF]

Journal of Advanced Dielectrics, 2018
Polycrystalline cobalt-substituted tungsten bronze ferroelectric ceramics with chemical composition Ba5CaTi2−xCoXNb8O30 (x=0.00, 0.02, 0.04 and 0.08) were synthesized by solid state reaction technique.
Shilpi Jindal, Sheela Devi, Ajay Vasishth, Khalid Mujasam Batoo, Gagan Kumar   +4 more
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Rietveld Refinement, Structural Characterization, and Methylene Blue Adsorption of the New Compound Ba_0.54Na_0.46Nb_1.29W_0.37O₅

Crystals, 2022
Using the solid-state process, the new compound Ba0.54Na0.46Nb1.29W0.37O5 was effectively produced in a single crystalline phase. The material’s characteristics were determined by X-ray diffraction and Raman techniques. The Rietveld method was applied to
Hicham Es-soufi, Hssain Bih, Lahcen Bih, Raman Rajesh, Alan Rogerio Ferreira Lima, M. I. Sayyed, Rabih Mezher   +6 more
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On the Arrangement of Pentagonal Columns in Tetragonal Tungsten Bronze-Type Nb₁₈W₁₆O₉₃

Crystals, 2021
The evaluation of HAADF-STEM images of a sample with the composition Nb18W16O93 provided new insights into its real structure. The basic structure comprises an intact octahedral framework of the tetragonal tungsten bronze (TTB) type.
Frank Krumeich
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Síntese e caracterização estrutural do niobato de potássio e estrôncio com estrutura tipo Tetragonal Tungstênio Bronze TTB Synthesis and structural characterization of strontium potassium niobate oxide with tetragonal tungstenium bronze TTB type structure

Cerâmica, 2005
A fase nanoestruturada KSr2Nb5O15, foi sintetizada pelo método de mistura mecânica de óxidos por moagem de alta eficiência e por via química, utilizando o método dos precursores poliméricos, em forno tipo tubo sob atmosfera de O2 durante 10 h.
S. Lanfredi, L. R. Trindade, A. R. Barros, N. R. Feitosa, M. A. L. Nobre   +4 more
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Effect of modifiers on the barium niobate-calcium ceramics structure

Физико-химические аспекты изучения кластеров, наноструктур и наноматериалов, 2022
In this work, the ceramic samples Са0,3Ba0,7Nb2O6 pure and with modifying additives (5%) SrTiO3, KTaO3 or LiTaO3 were obtained by solid-phase synthesis. All studied compositions of ceramics revealed the presence of large and small grains.
O.S. Guseva, O.V. Malyshkina, A.S. Mitchenko   +2 more
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Complex Epitaxy of Tetragonal Tungsten Bronze K–Ta–Nb–O Nanorods

, 2020
Tetragonal tungsten bronze (TTB) phases possess numerous important properties (ferroelectricity, multiferroicity, piezoelectricity, optical nonlinearity, electro-optics) that can be achieved by modifying their composition, in addition to their ability to
V. Demange (1932784), V. Demange, L. Joanny (6331400), F. Gouttefangeas (6331403), L. Joanny, Q. Simon, M. Guilloux-Viry, Q. Simon (1932787), M. Guilloux-Viry (1932796), F. Gouttefangeas   +9 more
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Intergrowth of niobium tungsten oxides of the tetragonal tungsten bronze type

Zeitschrift für Naturforschung B, 2020
Abstract Since the 1970s, high-resolution transmission electron microscopy (HRTEM) is well established as the most appropriate method to explore the structural complexity of niobium tungsten oxides. Today, scanning transmission electron microscopy (STEM) represents an important alternative for performing the structural characterization ...
openaire   +4 more sources

Análises térmicas e processo de sinterização da cerâmica KSr2Nb5O15 dopada com CuO Thermal analysis and sintering process of KSr2Nb5O15 ceramic doped with CuO

Química Nova, 2009
KSr2Nb5O15 is a ferroelectric material. The sintering process of the KSr2Nb5O15 ceramic doped with different amounts of CuO was investigated in this research. It was found that CuO is effective as promoter of the densification process of the KSN ceramic.
Delia do Carmo Vieira, Celso Xavier Cardoso, Rafael Matos Duran   +2 more
doaj   +1 more source