Patent ID: 8673795
Filing Date: 2014-03-18
Classification: C04B

Abstract:
1. A ceramic insulator material comprising: 34-49 wt % silicon; 19-31 wt % nitrogen; 2.5-5.8 wt % aluminum; 8-20 wt % barium; 0-8 wt % strontium; 0-0.5 wt % at least one rare earth element; 0.01-1 wt % transition metal; 8-20 wt % oxygen; and 0.3-1.5 wt % carbon; wherein the ceramic insulator material has a dielectric strength of greater than 10 KV/mm, a modulus of rupture strength of at least 500 MPa, dielectric constant of less than 8.3, a dielectric loss tangent less than 0.003 at 1 MHz, a fracture toughness of at least 5.5 MPa·m