Method for manufacturing stabilized zirconia
AssigneePraxair S.T. Technology, Inc.
InventorsVladimir Belov, Irina Belov
Life of this patent
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Abstract
The process produces a stabilized zirconia powder by first contacting zirconium basic carbonate particles with a stabilizer compound. This reacts the zirconium basic carbonate particles with the stabilizer compound through heterogeneous contact to form a stabilized zirconia precursor. The stabilizer compound is for stabilizing a phase structure selected from the group consisting of tetragonal phase, cubic phase and mixtures of tetragonal and cubic phases. And calcining the stabilized zirconia precursor removes gaseous by-products and forms the stabilized zirconia powder. The stabilized zirconia powder has a phase structure selected from the group consisting of tetragonal, cubic and mixtures of tetragonal and cubic.
Claims20
A process for producing a stabilized zirconia powder comprising the steps of:
- a) contacting zirconium basic carbonate particles with a stabilizer compound to react the zirconium basic carbonate particles with the stabilizer compound through heterogeneous contact and to form a stabilized zirconia precursor, the stabilizer compound being for stabilizing a phase structure selected from the group consisting of tetragonal phase, cubic phase and mixtures of tetragonal and cubic phases;
- and
- b) calcining the stabilized zirconia precursor to remove gaseous by-products and to form the stabilized zirconia powder, the stabilized zirconia powder having a phase structure selected from the group consisting of tetragonal, cubic and mixtures of tetragonal and cubic.
A process for producing a stabilized zirconia powder comprising the steps of:
- a) contacting zirconium basic carbonate particles with an yttrium-containing compound to react the zirconium basic carbonate particles with the yttrium-containing compound through heterogeneous contact and to form an yttria stabilized zirconia precursor, the yttrium-containing compound being for stabilizing a phase structure selected from the group consisting of tetragonal phase, cubic phase and mixtures of tetragonal and cubic phases;
- and
- b) calcining the yttria stabilized zirconia precursor to remove gaseous by-products and to form an yttria stabilized zirconia powder, the yttria stabilized zirconia powder having a phase structure selected from the group consisting of tetragonal, cubic and mixtures of tetragonal and cubic.
Dependencies are inferred from the claim text.