SPHERICAL TUNGSTEN DISULFIDE POWDER
A tungsten disulfide powder comprised of macro-spherical particles of tungsten disulfide having an average particle diameter of from about 5 to about 50 micrometers is prepared by successively treating spray-dried powders of ammonium metatungstate with heat in air and sulfidizing the resultant tungs...
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| creator | GINGERICH, RICHARD, G., W |
| description | A tungsten disulfide powder comprised of macro-spherical particles of tungsten disulfide having an average particle diameter of from about 5 to about 50 micrometers is prepared by successively treating spray-dried powders of ammonium metatungstate with heat in air and sulfidizing the resultant tungsten trioxide in a carbon disulfide-containing atmosphere at about 750 °C. The tungsten disulfide powder may also be formed to have a bimodal particle size distribution of the macro-spherical particles and smaller, dispersed micro- to submicron-sized fine particles.
L'invention concerne une poudre de disulfure de tungstène à particules macrosphériques de diamètre moyen compris entre environ 5 et environ 50 micromètres, élaborée selon les étapes successives suivantes: traitement thermique de poudres de métatungstate d'ammonium séchées par pulvérisation dans l'air, et sulfuration du trioxyde de tungstène résultant dans une atmosphère contenant du disulfure de carbone à environ 750 DEG C. On peut aussi élaborer la poudre considérée pour lui conférer une distribution bimodale de la taille des particules, en particules macrosphériques et en particules plus petites, fines et dispersées de taille micronique à submicronique. |
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L'invention concerne une poudre de disulfure de tungstène à particules macrosphériques de diamètre moyen compris entre environ 5 et environ 50 micromètres, élaborée selon les étapes successives suivantes: traitement thermique de poudres de métatungstate d'ammonium séchées par pulvérisation dans l'air, et sulfuration du trioxyde de tungstène résultant dans une atmosphère contenant du disulfure de carbone à environ 750 DEG C. On peut aussi élaborer la poudre considérée pour lui conférer une distribution bimodale de la taille des particules, en particules macrosphériques et en particules plus petites, fines et dispersées de taille micronique à submicronique.</description><edition>7</edition><language>eng ; fre</language><subject>CHEMISTRY ; COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F ; FUELS ; INORGANIC CHEMISTRY ; LUBRICANTS ; LUBRICATING COMPOSITIONS ; METALLURGY ; PEAT ; PETROLEUM, GAS OR COKE INDUSTRIES ; TECHNICAL GASES CONTAINING CARBON MONOXIDE ; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATINGINGREDIENTS IN A LUBRICATING COMPOSITION</subject><creationdate>2005</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20050106&DB=EPODOC&CC=WO&NR=2004055228A3$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,780,885,25564,76547</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20050106&DB=EPODOC&CC=WO&NR=2004055228A3$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>GINGERICH, RICHARD, G., W</creatorcontrib><title>SPHERICAL TUNGSTEN DISULFIDE POWDER</title><description>A tungsten disulfide powder comprised of macro-spherical particles of tungsten disulfide having an average particle diameter of from about 5 to about 50 micrometers is prepared by successively treating spray-dried powders of ammonium metatungstate with heat in air and sulfidizing the resultant tungsten trioxide in a carbon disulfide-containing atmosphere at about 750 °C. The tungsten disulfide powder may also be formed to have a bimodal particle size distribution of the macro-spherical particles and smaller, dispersed micro- to submicron-sized fine particles.
L'invention concerne une poudre de disulfure de tungstène à particules macrosphériques de diamètre moyen compris entre environ 5 et environ 50 micromètres, élaborée selon les étapes successives suivantes: traitement thermique de poudres de métatungstate d'ammonium séchées par pulvérisation dans l'air, et sulfuration du trioxyde de tungstène résultant dans une atmosphère contenant du disulfure de carbone à environ 750 DEG C. On peut aussi élaborer la poudre considérée pour lui conférer une distribution bimodale de la taille des particules, en particules macrosphériques et en particules plus petites, fines et dispersées de taille micronique à submicronique.</description><subject>CHEMISTRY</subject><subject>COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F</subject><subject>FUELS</subject><subject>INORGANIC CHEMISTRY</subject><subject>LUBRICANTS</subject><subject>LUBRICATING COMPOSITIONS</subject><subject>METALLURGY</subject><subject>PEAT</subject><subject>PETROLEUM, GAS OR COKE INDUSTRIES</subject><subject>TECHNICAL GASES CONTAINING CARBON MONOXIDE</subject><subject>USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATINGINGREDIENTS IN A LUBRICATING COMPOSITION</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>2005</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZFAODvBwDfJ0dvRRCAn1cw8OcfVTcPEMDvVx83RxVQjwD3dxDeJhYE1LzClO5YXS3AzKbq4hzh66qQX58anFBYnJqXmpJfHh_kYGBiYGpqZGRhaOxsbEqQIA-2kj0w</recordid><startdate>20050106</startdate><enddate>20050106</enddate><creator>GINGERICH, RICHARD, G., W</creator><scope>EVB</scope></search><sort><creationdate>20050106</creationdate><title>SPHERICAL TUNGSTEN DISULFIDE POWDER</title><author>GINGERICH, RICHARD, G., W</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_WO2004055228A33</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng ; fre</language><creationdate>2005</creationdate><topic>CHEMISTRY</topic><topic>COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F</topic><topic>FUELS</topic><topic>INORGANIC CHEMISTRY</topic><topic>LUBRICANTS</topic><topic>LUBRICATING COMPOSITIONS</topic><topic>METALLURGY</topic><topic>PEAT</topic><topic>PETROLEUM, GAS OR COKE INDUSTRIES</topic><topic>TECHNICAL GASES CONTAINING CARBON MONOXIDE</topic><topic>USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATINGINGREDIENTS IN A LUBRICATING COMPOSITION</topic><toplevel>online_resources</toplevel><creatorcontrib>GINGERICH, RICHARD, G., W</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>GINGERICH, RICHARD, G., W</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>SPHERICAL TUNGSTEN DISULFIDE POWDER</title><date>2005-01-06</date><risdate>2005</risdate><abstract>A tungsten disulfide powder comprised of macro-spherical particles of tungsten disulfide having an average particle diameter of from about 5 to about 50 micrometers is prepared by successively treating spray-dried powders of ammonium metatungstate with heat in air and sulfidizing the resultant tungsten trioxide in a carbon disulfide-containing atmosphere at about 750 °C. The tungsten disulfide powder may also be formed to have a bimodal particle size distribution of the macro-spherical particles and smaller, dispersed micro- to submicron-sized fine particles.
L'invention concerne une poudre de disulfure de tungstène à particules macrosphériques de diamètre moyen compris entre environ 5 et environ 50 micromètres, élaborée selon les étapes successives suivantes: traitement thermique de poudres de métatungstate d'ammonium séchées par pulvérisation dans l'air, et sulfuration du trioxyde de tungstène résultant dans une atmosphère contenant du disulfure de carbone à environ 750 DEG C. On peut aussi élaborer la poudre considérée pour lui conférer une distribution bimodale de la taille des particules, en particules macrosphériques et en particules plus petites, fines et dispersées de taille micronique à submicronique.</abstract><edition>7</edition><oa>free_for_read</oa></addata></record> |
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| language | eng ; fre |
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| subjects | CHEMISTRY COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F FUELS INORGANIC CHEMISTRY LUBRICANTS LUBRICATING COMPOSITIONS METALLURGY PEAT PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MONOXIDE USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATINGINGREDIENTS IN A LUBRICATING COMPOSITION |
| title | SPHERICAL TUNGSTEN DISULFIDE POWDER |
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