HEAT-PROCESSING METHOD FOR PIEZOELECTRIC CERAMIC AND ACCELERATION SENSOR

PROBLEM TO BE SOLVED: To invalidate pyroelectric effect even if a piezoelectric ceramics are not of the same performance. SOLUTION: When piezoelectric ceramics 2 and 3 are bonded to a metal vibration plate 1 with a bond 6, electrodes 4 and 5 of piezoelectric ceramics are heated for solidification wh...

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Bibliographic Details
Main Author TAKAHASHI JUHEI
Format Patent
LanguageEnglish
Published 15.10.1999
Edition6
Subjects
ARTIFICIAL STONE
CEMENTS
CERAMICS
CHEMISTRY
COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS
CONCRETE
ELECTRICITY
INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
LIME, MAGNESIA
MEASURING
MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION,OR SHOCK
METALLURGY
PHYSICS
REFRACTORIES
SLAG
TESTING
TREATMENT OF NATURAL STONE
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Summary:PROBLEM TO BE SOLVED: To invalidate pyroelectric effect even if a piezoelectric ceramics are not of the same performance. SOLUTION: When piezoelectric ceramics 2 and 3 are bonded to a metal vibration plate 1 with a bond 6, electrodes 4 and 5 of piezoelectric ceramics are heated for solidification while they are electrically shorted through pyroelectric pins 10 and 11, a pressurizing piece 7, a receiving piece 8, and a center pin 9 or shorted with a conductor comprising a resistance value. By forcedly discharging an electric charge caused by pyroelectric effect during heating/ solidification at bonding of a plurality of piezoelectric ceramics, a piezoelectric ceramics of large pyroelectric characteristics is matched with a piezoelectric ceramic of small pyroelectric characteristics, resulting in invalidation of pyroelectric effect. So, when it is used for an acceleration sensor, only an output proportional to oscillation acceleration is obtained for excluding a needless output caused by temperature.
Bibliography:Application Number: JP19980085675