LARGE-DISPLACEMENT ELECTROSTRICTIVE ELEMENT

PURPOSE:To enlarge the application field of an electrostrictive element through an electrostrictive material having large displacement and small hysteresis by adding a specific metal to a PBZT group composition which has not been researched approximately as a porcelain composition having small displ...

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Bibliographic Details
Main Authors NAKAJIMA MUTSUO, HAGIMURA ATSUSHI, NAKAHARA SHIGEKI
Format Patent
LanguageEnglish
Published 25.06.1991
Subjects
ELECTRICITY
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Summary:PURPOSE:To enlarge the application field of an electrostrictive element through an electrostrictive material having large displacement and small hysteresis by adding a specific metal to a PBZT group composition which has not been researched approximately as a porcelain composition having small displacement. CONSTITUTION:An electrostrictive element is prepared of (PhyBa1-y)a Meb(ZrxTi1-x)cOd. In formula, (x), (y), (a) and (b) are specified respectively as follows. That is, y<(4/3)x holds, and the conditions of 0.60<=y<=0.80, 0.45<=x<=0.60, 0.85<=a<=1.15, 0.001<=b<=0.02 and 0.85<=c<=1.15 are satisfied. (d) represents a numeric value determined by the states of oxidation of each element. At least one kind of an element selected from a group consisting of La, Ce and Pb is used as Me. Such a composition is mixed sufficiently by a ball mill, calcined at 860-900 deg.C, pulverized by the ball mill again, dried and formed in a discoid shape by applying pressure of two ton/cm , and the discoid fine particles are sintered at 1200-1350 deg.C.
Bibliography:Application Number: JP19890287592