Results 171 to 180 of about 2,365 (229)

Crystal Structure, Infrared Reflection Spectrum, and Improved Microwave Dielectric Characteristics of Ba₄Sm_28/3Ti₁₈O₅₄ Ceramics via One-Step Reaction Sintering. [PDF]

Materials (Basel)
Li Z, Zhou H, Xiong G, Wang H, Wang G.
europepmc   +1 more source

Preparation of Tungsten Bronze Nanowires

MRS Proceedings, 2003
ABSTRACTTwo simple techniques to prepare tungsten bronze nanowires are reported in this paper. Tungsten bronze nanowires with a diameter of less than 100nm and a length of more than 10 μm have been successfully prepared by employing these techniques. A Vapor-Liquid-Solid (VLS) mechanism has been proposed to explain the growth of these tungsten bronze ...
Hang Qi, Cuiying Wang, Jie Liu
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Decreasing the time response of calibration-free pH sensors based on tungsten bronze nanocrystals [PDF]

Journal of Electroanalytical Chemistry, 2017
A considerable improvement of time constants of tungsten bronze pH sensors was achieved by decreasing the crystal size of the tungsten bronze previously reported by the authors.
Regina Cisternas, Luis Ballesteros, Heike Kahlert   +2 more
exaly   +3 more sources

Sodium tungsten bronze (Na WO3)-doped near-infrared-shielding bulk glasses for energy-saving applications

Journal of Materials Science and Technology, 2021
Tungsten bronze coatings and films have attracted global attention for their applications in near-infrared (NIR)-shielding windows. However, they are unstable in strong ultraviolet, humid heat, alkaline and/or oxidizing environments and are difficult to ...
Guang Yang, Liangmiao Zhang, Chuanxiang Cao   +2 more
exaly   +1 more source

Structural and impedance spectroscopic study of Zn-substituted Ba5CaTi2Nb8O30 tetragonal tungsten bronze ceramics

Journal of Alloys and Compounds, 2021
International audienceZn-doped tungsten bronze compounds derived from Ba5CaTi2Nb8O30, with Ba5CaTi2-xZnxNb8O30 composition (x=0; 0.04 and 0.08) were synthesized by the conventional solid-state reaction route.
Amine Bendahhou, Pascal Marchet, Soufian El Barkany   +2 more
exaly   +2 more sources

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Vaporisation of tungsten bronzes II Sodium and potassium tungsten bronzes

Materials Research Bulletin, 1983
Abstract Thermodynamic calculations indicate that the disproportionation of sodium tungsten bronze is expected to occur at a lower temperature than that required for direct decomposition via congruent vaporisation. This expectation has been tested for cubic sodium bronzes and also for cubic europium and cerium bronzes, a tetragonal II potassium ...
N.J. Clark, Peter L. Mart
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Octahedral tilting in the tungsten bronzes

Acta Crystallographica Section B Structural Science, Crystal Engineering and Materials, 2015
Possibilities for `simple' octahedral tilting in the hexagonal and tetragonal tungsten bronzes (HTB and TTB) have been examined, making use of group theory as implemented in the computer programISOTROPY. For HTB, there is one obvious tilting pattern, leading to a structure in space groupP63/mmc. This differs from the space groupP63/mcmfrequently quoted
Whittle, Thomas A., Schmid, Siegbert, Howard, Christopher J.   +2 more
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Coulomb Gap in Sodium Tungsten Bronzes*,**

Zeitschrift für Physikalische Chemie, 1986
Calcul numerique de la densite d'etats avec un modele classique de Na x Ta y W 1−y O 3 , pour des valeurs de X et Y correspondant a des phases isolantes; excellent accord avec des resultats recents d'emission photoelectronique dont les caracteristiques principales et en particulier la presence d'une bande interdite au voisinage du potentiel chimique ...
, Davies, , Franz
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Superconductivity in the tungsten bronzes

Journal of the Less Common Metals, 1978
Abstract Four superconducting alkali tungsten bronzes (MxWO3) have been studied at pressures up to 20 kbar in a search for pressure-induced phase changes. Both the Na and the Rb bronzes show a linear dependence of Tc on pressure with no evidence of a phase change.
J.E Ostenson, H.R Shanks, D.K Finnemore
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Electrical and Magnetic Properties of Potassium Tungsten Bronze and Rubidium Tungsten Bronze

Inorganic Chemistry, 1963
Abstract : Single crystal conductivities were measured for K.4W03 and Rb.32W03 in the range 150 to 370 K. Carrier mobilities, which are somewhat higher than in the Li and Na tungsten bronzes, closely follow a T sinh squarred (theta/2T) dependence. Calculations on the basis of the theory of Howarth and Sondheimer strongly support the assumption that the
M. J. Sienko, Sheila MacEnness Morehouse
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