Patent ID: 6527846
Filing Date: 2003-03-04
Classification: A61K,C03C,C04B

Abstract:
A glass ceramic having a high crystalline leucite content, the leucite crystals being in needle or column form, having a thickness of from 0.3 to 1.5 micrometers and having a length of from 7.5 to 20 micrometers and the glass ceramic substantially being a semi-transparent material which comprises:MaterialPercent by weightSiO267-71Al2O3â€‚8-12Na2O3-5K2Oâ€‚8-10CaO1-3BaO0.2-2â€‚â€‰CeO20.5-2â€‚â€‰TiO20.2-1â€‚â€‰B2O3â€‰0.5-2.â€‚â€‰