| 摘要 |
A ceramic igniter comprises a pair of conductive ends, a hot zone disposed between the conductive ends, the hot zone having a density of at least about 95% of theoretical density and a composition comprising: (a) between about 50 and about 80 vol % of an electrically insulating material selected from the group consisting of aluminum nitride, boron nitride, silicon nitride, and mixtures thereof. (b) between about 10 and about 45 vol % of a semiconductive material selected from the group consisting of silicon carbide and boron carbide, and (c) between about 5 and about 25 vol % of a metallic conductor selected from the group consisting of molybdenum disilicide, tungsten disilicide, titanium nitride, and mixtures thereof, and a support upon which the hot zone is disposed, wherein at least a portion of the hot zone has a thickness of no more than 0.019''. |
