14 KB101 KB13 KB199219991998Maček, JadranMarinšek, Marjanletnik:32številka:5str. 347-350ISSN:1318-0010COBISSID:81578URN:URN:NBN:SI:doc-P43MSTCRslInštitut za kovinske materiale in tehnologijeŽelezarna JeseniceŽelezarna RavneŽelezarna ŠtoreKovine zlitine tehnologijeceramicgelikeramikakompozitikovinski oksidinikeljprecipitacijaKoprecipitacijska metoda za pripravo keramičnih materialov| Coprecipitation method for the preparation of ceramic materials|The composite materials of nickel and with yittria stabilized zirconia (YSZ) were prepared by the two classic routes, e.g. by mixing of the nickel oxide or fine nickel powder with the YSZ powder and by the gel-coprecipitation method from the aqueous solutions of corresponding chlorides by ammonia. The products of the coprecipitation were dried (120°C), calcined (950°C), milled, sintered (1300°C) and reduced in a gas mixture of Ar/4 vol% ?$H_2$? at 1000°C. The coprecipitated products at the fracture reveal finer microstructure with particle sizes of around one micrometer. Calculations based on XRD measurements infer that these paraticles are composed of around 10-20 nm large YSZ and around 65-70 nm large Ni crystallitesKompozitne materiale niklja in z itrijevim oksidom stabiliziranega cirkonijevega oksida (YSZ) smo pripravili na dva načina, t.j. z mešanjem nikljevega oksida oziroma finega nikljevega prahu z YSZ prahom ali z metodo gelske-koprecipitacije iz vodnih raztopin odgovarjajočih kloridov z amoniakom. Produkte soobarjanja smo sušili (120°C), kalcinirali (950°C) in mleli, sintrali pri 1300°C ter reducirali v plinski mešanici Ar/4 vol% ?$H_2$? pri 1000°C. Na osnovi koprecipitacije dobljeni materiali kažejo na to, da so ti delci sestavljeni iz okoli 10-20 nanometrov velikih kristalitov YSZ ter okoli 65-70 nm velikih kristalov nikljaNadaljuje se kot: Materiali in tehnologijeTEXTznanstveno časopisjejournalsSlovenian National E-content AggregatorNational and University Library of SloveniaInštitut za kovinske materiale in tehnologije