Pyroelectric ceramic composition, and the pyroelectric element, as well as the infrared detector

摘要

As for electric characteristic porcelain composition, general system (Pb_{1-xCa x}) _(1+a) {(Ni_1/3Nb2/3) _{yTi (1-y)}}O₃ (however, x, y and each one 0.20x0.27, 0.01y0.06 and 0.001a0.02) with designate the chemical compound which is displayed as the main component, Mn 0.3 - 2.5 mols is contained vis-a-vis the said main component 100 mol. Any banding things which include Ni, Ti and Mn below 1.0vol% (include 0vol% in the sintered body which is calcined.)So it is. Because of this although possessing the curie point where insulating resistance is low moderately, at the same time is high, it actualizes the electric characteristic porcelain composition which possesses satisfactory electric quality. Because the aforementioned composition curie point is high, it can obtain the reflow processing possible thin layer small-sized electric element. Because the aforementioned composition insulating resistance is low, as for the infrared detector which uses the aforementioned composition for the electric element, the electric element and as for the necessity to provide load resistance in parallel it is not, miniaturization is possible.