Patent ID: 7399723

Claim:
A dielectric ceramic material comprising: main constituents given by a composition located in a region, in a ternary diagram of ZrO 2 , SnO 2 and TiO 2 shown in FIG. 1 , bounded by point A (ZrO 2 =48 mol %, SnO 2 =12 mol %, TiO 2 =40 mol %) point B (ZrO 2 =36 mol %, SnO 2 =24 mol %, TiO 2 =40 mol %) point C (ZrO 2 =30 mol %, SnO 2 =20 mol %, TiO 2 =50 mol %) point D (ZrO 2 =36 mol %, SnO 2 =9 mol %, TiO 2 =55 mol %) point E (ZrO 2 =40.5 mol %, SnO 2 =4.5 mol %, TiO 2 =55 mol %), and point F (ZrO 2 =49.5 mol %, SnO 2 =5.5 mol %, TiO 2 =45 mol %); and ZnO: 0.5 to 5 wt %, NiO: 0.1 to 3 wt %, and SiO 2 : 0.008 to 1.5 wt % in relation to the total weight of said main constituents.