Patent · US Expired

Zirconia sol, process of making and composite material

US6376590B2 · kind B2 · utility

187Cited by
93References
34Claims
0Family size

Assignee

Inventors

Key dates

Filing dateOct 28, 1999
Grant dateApr 23, 2002
Priority date—
Expiry dateOct 28, 2019

Classification

  • Technology area (CPC C)Chemistry; Metallurgy
  • CPC primaryC08K2003/2244
  • WIPO fieldMacromolecular chemistry, polymers
  • WIPO sectorChemistry

Abstract

A zirconia sol comprising an aqueous phase having dispersed therein a plurality of single crystal zirconia particles having an average primary particle size less than about 20 nm. The zirconia sols are substantially non associated having a dispersion index ranging from about 1-3 and are highly crystalline exhibiting a crystallinity index of about 0.65 or greater. Of the crystalline phase, about 70% or greater exists in combined cubic and tetragonal crystal lattice structures without a crystal phase stabilizer. Also described is a hydrothermal method of making zirconia sols having substantially non-associated zirconia particles and composite materials made from the zirconia sols.

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