Patent · US Active

Shaped sintered ceramic bodies composed of Y2O3-stabilized zirconium oxide and process for producing a shaped sintered ceramic body composed of Y2O3-stabilized zirconium oxide

US9802868B2 · kind B2 · utility

4Cited by

8References

20Claims

0Family size

Assignee

Fraunhofer-Gesellschaft zur förderung der angewandten Forschung e.V. · DE

Inventors

Martina Johannes · Hermsdorf, DE
Jens Schneider · Bielefeld, DE

Key dates

Filing date	Mar 1, 2013
Grant date	Oct 31, 2017
Priority date	—
Expiry date	Mar 3, 2034

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/268
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

Disclosed is a ceramic sintered shaped body containing Y2O3-stabilized zirconia with a sintered density of at least 99% of the theoretical sintered density and having a mean grain size of <180 nm. The zirconia fraction of the sintered shaped body comprises tetragonal and cubic phases. Also disclosed is a process for the production of a ceramic sintered shaped body containing Y2O3-stabilized zirconia, which process comprises dispersion of a submicron powder and comminution of the dispersed submicron powder by means of grinding media having a diameter of less than or equal to 100 μm to a particle size d95 of <0.42 μm; shaping of the dispersion to form a body, and sintering of the body to form the sintered shaped body.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.