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PROBLEM TO BE SOLVED : To remedy drawbacks of the related art. SOLUTION : A ceramic material for an injection-molding process for producing a combustion chamber pressure sensor, in particular for producing an insulator of a combustion chamber pressure sensor, comprises a ceramic component in a proportion greater than or equal to 50 mass% and a glass component in a proportion less than or equal to 50 mass%. The ceramic component includes aluminum oxide. The glass component includes silicon dioxide or a silicon dioxide precursor. The ceramic material further includes an alkaline earth metal oxide or an alkaline earth metal oxide precursor. COPYRIGHT : (C)2014, JPO&INPIT