Oxides tungsten oxide

Sellaite, see Magnesium fluoride Senarmontite, see Antimony(III) oxide Siderite, see Iron(II) carbonate Siderotil, see Iron(II) sulfate 5-water Silica, see Silicon dioxide Silicotungstic acid, see Silicon oxide—tungsten oxide—water (1/12/26)... 

Metal oxide semiconductive sensors are not limited to tin oxide only. Many other metal oxides, such as zinc oxide, tungsten oxide, and others can also be used for chemical and gas sensing. It is understandable that an incorporation of a selective catalyst or a dopant may enhance the selectivity of the MOS sensors. Palladium, platinum, and others have been used as catalytic dopants for these sensors. The processes... 

Oxides are normally stable at the operating temperatures necessary to enhance the interaction between their surface and the gas phase, much more stable compared to organic materials. They are normally operated between 500 and 800 K where the conduction is electronic and oxygen vacancies are doubly ionized. Different oxides have been proposed for conductometric chemical sensors, the most studied is by far tin dioxide that has also been commercialized in form of thick film sensors. Other oxides studied are titanium oxide, tungsten oxide, zinc oxide, indium oxide and iron oxide, first in form of thick and then in form of thin films. Furthermore, the use of mixed oxides, as well as the addition of noble metals, has been studied to improve not only selectivity but also stability. 

Inert, inorganic materials (2) Redox-active metal oxides Electroinactive (silica, alumina, and zirconia) Electroactive (vanadium pentoxide, manganese oxide, tungsten oxide, etc.)... 

Nickel oxide/tungsten oxides supported on alumina are more active as sulfides and can be used if pyrolysis gasoline contains relatively high levels of reactive suhur compoimds. ... 

PASSERINI, s., SCROSATI, B., HERMANN, V., et ol.. Laminated electrochromic windows based on nickel oxide, tungsten oxide, and gel electrolytes,/. Electrochem. Soc., 1994,141,1025-8. 

Traditionally, tungsten ore is chemically processed to ammonium paratungstate [1311-93-9] 5H20, and tungsten oxides, W O. These... 

T. WHken, C. Wert,J. Woodhouse, and W. Morcom, "Reduction of Blue Tungsten Oxide," in H. H. Hausner and P. V. Taubenblat, eds.. Modem Developments in Powder Metallurgy, Vol. 9, Plenum Press, New York, 1977, pp. 161—169. 

Blue tungsten oxide and combiaations thereof (106—113) have been the subject of a number of patents, as have copper(II) fluoborate (114) and alkaH metal or ammonium sulfate-hydrogen sulfate catalysts (115,116). 

Wolframit, n. (Min.) wolframite. Wolfram-lampe, /. tungsten lamp, metall, n. metallic tungsten, -ocker, m. tungstic ocher, tungstite. -oxyd, n. tungsten oxide, -salz, n. tungsten salt. 

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