| 摘要 |
<p>A method of heating, comprising the step of providing a line voltage of between 120 V and 230 V across a ceramic igniter having a hot zone composition comprising: (a) between 50 and 80 v/o of an electrically insulating ceramic having a resistivity of at least about 1010 ohm-cm; (b) between 10 and 45 v/o of a semiconductive material having a resistivity of between about 1 and about 108 ohm-cm; (c) between 5 and 25 v/o of a metallic conductor having a resistivity of less than about 10-2 ohm-cm; and (d) between 2.0 and 20 v/o of a resistivity-enhancing compound selected from the group consisting of metallic oxides, metallic oxynitrides, rare earth oxides, rare earth oxynitrides, and mixtures thereof.</p> |
