EP 3116843 A1 20170118 - REFRACTORY MATERIALS COMPRISING A MIXED CRYSTAL HAVING SPINEL STRUCTURE
Title (en)
REFRACTORY MATERIALS COMPRISING A MIXED CRYSTAL HAVING SPINEL STRUCTURE
Title (de)
FEUERFESTE MATERIALIEN ENTHALTEND EINEN MISCHKRISTALL MIT SPINELL-STRUKTUR
Title (fr)
MATÉRIAUX RÉFRACTAIRES CONTENANT UN CRISTAL MIXTE À STRUCTURE SPINELLE
Publication
Application
Priority
- EP 14159478 A 20140313
- EP 2015055193 W 20150312
Abstract (en)
[origin: WO2015136041A1] Refractory materials obtained by heating a mixture Z to at least 250°C, preferably to at least 350°C, characterized in that the mixture Z comprises the following components: * 80% to 97% by weight of a component A, where the percentages by weight are based on the total mass of components A, B and, if present, C in the mixture Z which consists to an extent of at least 80% by weight, preferably to an extent of at least 90% by weight, where the percentages by weight are based on component A, of one or more of the oxides selected from the group consisting of Al2O3, Zr O2, Be O, Mg O, Ti O2, Fe2O3, Cr2O3, La2O3, Ta2O5 and SnO2, and * 3% to 15% by weight of a component B, where the percentages by weight are based on the total mass of components A, B and, if present, C in the mixture Z, and component B comprises to an extent of at least 80% by weight, preferably to an extent of at least 85% by weight, more preferably to an extent of at least 90% by weight, where the percentages by weight are based on component B, a mixed crystal having spinel structure comprising at least the oxides Fe2O3, Al2O3, Mg O and Cr2O3 , where the mixed crystal having spinel structure of component B contains * 30% to 80% by weight, preferably 40% to 68% by weight, of Fe2O3, * 10% to 60% by weight, preferably 15% to 43% by weight, of Al2O3, * 5% to 55% by weight, preferably 10% to 38% by weight, of MgO and * 5% to 55% by weight, preferably 7% to 35% by weight, of Cr2O3, where the percentages by weight are based on the mass of the mixed crystal having spinel structure, and * 0% to 15% by weight of a component C, where the percentages by weight are based on the total mass of components A, B and, if present, C in the mixture Z which consists to an extent of at least 86% by weight, preferably to an extent of at least 92% by weight, where the percentages by weight are based on component C, of carbon.
IPC 8 full level
C04B 35/01 (2006.01); C04B 35/04 (2006.01); C04B 35/047 (2006.01); C04B 35/105 (2006.01); C04B 35/12 (2006.01); C04B 35/42 (2006.01); C04B 35/48 (2006.01); C04B 35/63 (2006.01); C04B 35/66 (2006.01)
CPC (source: EP)
C04B 35/047 (2013.01); C04B 35/105 (2013.01); C04B 35/12 (2013.01); C04B 35/26 (2013.01); C04B 35/42 (2013.01); C04B 35/482 (2013.01); C04B 35/6265 (2013.01); C04B 35/63 (2013.01); C04B 35/6303 (2013.01); C04B 35/6306 (2013.01); C04B 35/634 (2013.01); C04B 35/66 (2013.01); C04B 2235/3217 (2013.01); C04B 2235/3231 (2013.01); C04B 2235/3241 (2013.01); C04B 2235/3243 (2013.01); C04B 2235/3244 (2013.01); C04B 2235/422 (2013.01); C04B 2235/424 (2013.01); C04B 2235/425 (2013.01); C04B 2235/656 (2013.01); C04B 2235/72 (2013.01); C04B 2235/728 (2013.01); C04B 2235/761 (2013.01); C04B 2235/763 (2013.01); C04B 2235/96 (2013.01)
Citation (search report)
See references of WO 2015136041A1
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
EP 2918564 A1 20150916; EP 3116843 A1 20170118; WO 2015136041 A1 20150917
DOCDB simple family (application)
EP 14159478 A 20140313; EP 15709207 A 20150312; EP 2015055193 W 20150312