Glass ceramics
US4943541A · kind A · utility
5Cited by
5References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 13, 1988 |
| Grant date | Jul 24, 1990 |
| Priority date | — |
| Expiry date | May 13, 2008 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F2310/00293
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Glass ceramics used as dental material, artifical bone, etc. which contain 0.01 to 25 parts by weight of alkali metal oxides (R.sub.2 O), such as Li.sub.2 O, Na.sub.2 O, K.sub.2 O, Rb.sub.2 O, and Cs.sub.2 O, in 100 parts by weight of CaO-Al.sub.2 O.sub.3 -P.sub.2 O.sub.5 system material. During the casting for obtaining the glass ceramics, the molten fluid is sufficiently distributed to the fine corners of a mold, and the temperature for crystallization is low. Also, the time required for the crystallization is short and the crystalline formed shows no internal defects, and has high bending strength.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.