| 摘要 |
<p>Producing a finely divided powder material based on zirconium oxide-aluminum oxide, preferably zirconia toughened alumina (ATZ)- and/or alumina toughened zirconia (ZTA) powder material, comprises producing particles from raw materials that are introduced in a pulsed or non-pulsed hot gas stream and subsequently depositing in a filter system from the hot gas stream. Aluminum oxide-particles and doped zirconium oxide-particles are present separately in powder form. Independent claims are included for: (1) producing a composite material based on zirconium oxide-aluminum oxide, preferably ATZ- and/or ZTA-composite material, comprising providing raw material components to form a core and a coating in a combined or separate manner, in a pulsed or non-pulsed hot gas stream, coating the core at least partially in the hot gas stream and subsequently depositing in a filter system from the hot gas stream, where the aluminum oxide is at least partially coated with a doped zirconium-containing phase or doped zirconium oxide particles are at least partially coated with an aluminum oxide; (2) producing granules based on zirconium oxide-aluminum oxide, preferably ATZ- and/or ZTA-granules, comprising either: preparing a suspension using at least solid aluminum oxide particles and at least zirconium- and doping components present in the dissolved form and at least a fluid component and converting the suspension into granules, where the granules include at least aluminum oxide, at least a zirconium phase, doping components and optionally other components in an amount of 0.1-4 wt.%, and additionally non aluminum, zirconium, doping element and oxygen in an amount of 0.5-60 wt.%, or preparing a suspension using at least a fluid component and at least solid aluminum oxide particles and at least zirconium- and doping- components present in dissolved form and converting the suspension into granules, and thermally treating these granules at 300-1400[deg] C, where the thermally treated granules include at least aluminum oxide, doped zirconium oxide and optionally other components in an amount of 0.1-4 wt.%, and additionally non aluminum, zirconium, doping element and oxygen in an amount of 0.01-15 wt.%; (3) a powder material comprising either alumina particles (0.5-99 wt.%) and doped zirconia particles, both present separately in powdered form, where the powder material contains other components in an amount of 0.1-4 wt.%, or alumina particles coated by a doped zirconia phase or doped zirconia particles coated with a alumina phase; and (4) granules made from the powder material, comprising at least aluminum oxide, at least a zirconium-phase, doping components and optionally other components.</p> |
