Nanocrystalline zirconia and methods of processing thereof

US10610460B2 · kind B2 · utility

Assignee

• Ivoclar Vivadent AG · LI

Inventors

• Dmitri Brodkin · Livingston, US
• Yijun Wang · Riverview Drive, CN
• Ling Fung TANG · San Francisco, US
• Ajmal Khan · Princeton, US
• Anna B. Verano · Fryeburg, US

Key dates

• Filing date: Jan 10, 2018
• Grant date: Apr 7, 2020
• Expiry date: Jan 10, 2038

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C04B2235/9661
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

Zirconia dental ceramics exhibiting opalescence and having a grain size in the range of 10 nm to 300 nm, a density of at least 99.5% of theoretical density, a visible light transmittance at or higher than 45% at 560 nm, and a strength of at least 800 MPa.