The lead-free piezoceramic material from the mixing system alkaline earth perovskite, and bismuth-m

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Production of a piezo-ceramic material comprises preparing a piezo-ceramic starting composition of the material and heat treating. An independent claim is also included for a piezo-ceramic material comprising a binary mixed system made from an alkaline earth perowskite ABO3 and a bismuth oxide BiMO3 (where A = alkaline earth metal; B = group IVa and/or IVb element; and M = Sc, Yb or In.)