Apatite glass ceramic

US5318929A · kind A · utility

Assignee

• Thera Patent GmbH & Co KG Gesellschaft fur Industrielle Schutzrechte · DE

Inventors

• Carsten Jana · Jena, DE
• Wolfram Höland · Schaan, LI
• Werner Vogel · Jena, DE

Key dates

• Filing date: Oct 10, 1991
• Grant date: Jun 7, 1994
• Expiry date: Oct 10, 2011

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C03C10/16
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

The invention relates to an apatite glass ceramic which can be used as a material in medicine and as an inorganic component of a glass ionomer cement. The apatite glass ceramic comprises in wt-%) 15-40% SiO.sub.2, 15-35% Al.sub.2 O.sub.3, 12-30% CaO, 6-25% P.sub.2 O.sub.5, 2.5-15% F.sup.-, 0-18% R.sub.2 O, wherein R.sub.2 O is an alkali oxide. The apatite glass ceramic comprises a crystal phase which contains apatite.