Patent ID: 7064095
Filing Date: 2006-06-20
Classification: C04B

Abstract:
1. A multi-phase SiAlON ceramic material having at least a first, second and third phase, comprising: (a) a first phase of alpha-SiAlON having the general formula M (i) element of calcium; (ii) at least one of yttrium and/or a rare earth element with atomic number greater than 62; (iii) at least one of rare earth elements with an atomic number equal or smaller than 62; (b) a second phase of beta SiAlON having the general formula Si (c) a third phase of an intergranular amorphous and/or crystalline nature containing in addition to elements of Si, Al, O and N, (v) element of calcium; (vi) at least one of yttrium and/or a rare earth element with atomic number greater than 62; and (vii) at least one rare earth element with atomic number equal to or less than 62.