Patent ID: 8968455
Filing Date: 2015-03-03
Classification: A61K,C04B

Abstract:
1. A magnesium phosphate investment containing aluminum oxide and at least one of the following oxides: zirconium oxide (ZrO 2 ), yttrium oxide (Y 2 O 3 ), yttrium oxide stabilized zirconium oxide, titanium oxide or boron nitride in the following weight percent of a total dry investment: (a) aluminum oxide between 2 to 10% (b) zirconium oxide up to 10% (c) yttrium oxide stabilized zirconium oxide up to 10% (d) boron nitride up to 10% (e) titanium dioxide up to 10%, wherein the investment further comprises between 70 to 80% of silicon dioxide fillers containing 10 to 30% of cristobalite and 70 to 90% of quartz.