IN IN272DEN2014A

LEAD FREE PIEZOELECTRIC CERAMIC COMPOSITION METHOD FOR PRODUCING SAME PIEZOELECTRIC ELEMENT USING LEAD FREE PIEZOELECTRIC CERAMIC COMPOSITION ULTRASONIC PROCESSING MACHINE ULTRASONIC DRIVE DEVICE AND SENSING DEVICE

Publication no.

IN272DEN2014A
Priority date
2011-07-13
Filing date
2014-01-13
Published
2015-06-05
Assignee
NGK SPARK PLUG CO [JP]
Inventors

YAMAZAKI MASATO [JP], MATSUOKA TAKAYUKI [JP], KITAMURA KAZUAKI [JP], YAMADA HIDETO [JP], KURAHASHI TOSHIAKI [JP], YAMAGIWA KATSUYA [JP], OHBAYASHI KAZUSHIGE [JP]

Abstract

This lead free piezoelectric ceramic composition is mainly composed of a first crystal phase (KNN phase) and a second crystal phase (NTK phase). The first crystal phase (KNN phase) is composed of a plurality of crystal grains that are formed of an alkali niobate/tantalate perovskite oxide having piezoelectric characteristics said crystal grains being bonded with each other in a deposited state. The second crystal phase (NTK phase) is composed of a compound that contains titanium (Ti) and the spaces between the crystal grains in the first crystal phase are filled with the second crystal phase (NTK phase).

Classification

C04B35/00AI
G01L23/22AI
H10N30/00AI
H10N30/01AI
H10N30/045AI
H10N30/093AI
H10N30/097AI
H10N30/20AI
H10N30/50AI
H10N30/853AI
B06B1/0618
C04B35/495

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