Silicate product and strengthening method thereof
US11401198B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 10, 2017 |
| Grant date | Aug 2, 2022 |
| Priority date | — |
| Expiry date | Nov 16, 2038 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03C23/0065
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Provided is a silicate article comprising SiO2, Al2O3, Na2O, K2O, MgO and ZrO2, wherein the content of Al2O3 is 15-28 parts by weight, the content of Na2O is 13-25 parts by weight, the content of K2O is 6-15 parts by weight, the content of MgO is 7-16 parts by weight, and the content of ZrO2 is 0.1-5 parts by weight, relative to 100 parts by weight of SiO2; and M is 5-13, as calculated by the following formula: M=P1*wt (Na2O)+P2*wt (K2O)+P3*wt (MgO)+P4*wt (ZrO2)−P5*wt (Al2O3)*wt (Al2O3). In the formula, P1 has a value of 0.53, P2 has a value of 0.153, P3 has a value of 0.36, P4 has a value of 0.67, and P5 has a value of 0.018. The invention further provides a method for chemically strengthening the silicate article, wherein the Young's modulus and the surface compressive stress value of the silicate article can be further improved by using an ultrasonic treatment or both an ultrasonic treatment and a microwave treatment during the chemical strengthening process; furthermore, the tendency of the compressive stress value to change with depth and the depth of a layer of compressive stress can be controlled, thereby effectively preventing spontaneous burst, or slow cracking after colli…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.