Patent ID: 6380113
Filing Date: 2002-04-30
Classification: C04B

Abstract:
A zirconia/alumina composite, comprising a tetragonal zirconia ceramic powder comprising a composition in a triangle composition range formed of three composition points of 92 mol % ZrO2-4 mol % Y2O3-4 mol % Nb2O5 or Ta2O5, 89 mol % ZrO2-7 mol % Y2O3-4 mol % Nb2O5, 86 mol % ZrO2-7 mol % Y2-7 mol % Nb2O5or Ta2O5 in a ternary system of ZrO2â€”Y2O3â€”Nb2O5 or Ta2O3, wherein said composite is formed of ingredients comprising a tetragonal zirconia ceramic powder and an alumina of 5-50% (v/v).