Process for preparing a spark plug and obtained spark plug

摘要

The preparation of a high energy low voltage spark plug, incorporating a ceramic between its electrodes, comprises: (A) mixing, in a vessel enclosing a liquid, 50 to 75% of a compound forming a conducting phase and 25 to 50% of one or more materials forming yttrium garnet phases after heat treatment; (B) crushing, drying and filtering this mixture; (C) pressing or injecting the mixture into a mold; (D) firing to obtain a ceramic with a porosity of 0 to 30%; (E) using this ceramic as the material sited between the electrodes. An independent claim is also included for the high energy low voltage spark plug.