PIEZOELECTRIC CERAMIC COMPOSITION

PROBLEM TO BE SOLVED: To provide a piezoelectric ceramic composition having improved electromechanical coupling coefficient and smaller variation rate due to temperature change of mechanical quality factor and resonance frequency while high mechanical quality factor is maintained. SOLUTION: The piez...

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Bibliographic Details
Main Author KOMAGATA KAZUYA
Format Patent
LanguageEnglish
Published 02.02.2006
Subjects
ARTIFICIAL STONE
CEMENTS
CERAMICS
CHEMISTRY
COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS
CONCRETE
ELECTRICITY
LIME, MAGNESIA
METALLURGY
REFRACTORIES
SLAG
TREATMENT OF NATURAL STONE
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Summary:PROBLEM TO BE SOLVED: To provide a piezoelectric ceramic composition having improved electromechanical coupling coefficient and smaller variation rate due to temperature change of mechanical quality factor and resonance frequency while high mechanical quality factor is maintained. SOLUTION: The piezoelectric ceramic composition in which a part of Pb site of a perovskite compound consisting essentially of Pb(Mn1/3Sb2/3)O3-PbZrO3-PbTiO3is replaced by a rare earth element selected from La, Nd and Sm has a composition formula of Pb1-3x/2Mx[(Mn1/3Sb2/3)aZrbTic]O3(where 0<x<0.04, 0.02≤a≤0.10, 0.40≤b≤0.50, a+b+c=1 and M=La, Nd or Sm). COPYRIGHT: (C)2006,JPO&NCIPI
Bibliography:Application Number: JP20040205887