Production method of the piezoelectric ceramic body and the aforementioned composition and the aforementioned object which contain the piezoelectric ceramic composition and the aforementioned composition

摘要

The piezoelectric ceramic composition which possesses general empirical formula Pb_{1-aRE bZr xTi yTR zO3} is stated, here RE europium, gadolinium, lanthanum, neodymium, praseodymium and promethium and/or is selected from the group of samarium, it is one which possesses rare earth metal amount ratio b rare earth metal at least, TR the chrome and the iron and/or is selected from the group of manganese, it is transition metal valence W _TR and one which possesses transition metal amount ratio z transition metal at least, at the same time the following relationship is applicable: zb/(4-W _TR). It is achieved even at the sinterring temperature where the homogeneous PZT- crystal which possesses maximum grain size transition metal - and with the fault - stoichiometry doping ratio which consists of rare earth metal - doping, is low. With the change of doping, the piezoelectricity of the PZT- ceramics which possesses the aforementioned composition can change from the piezoelectricity of conventional software type PZT to the piezoelectricity of conventional hard type PZT. For example as for the piezoelectric ceramic body it is the piezoelectric actuator of multilayer structural style of monolithic, as for this it is enabled in the multiple injection in the engine of the automobile on the basis of the big d₃₃ - constant and low internal loss in the large signal range.