Shear Mode Piezo Half-Rings from American Piezo
APC International is pleased to offer custom shear mode piezo half-rings. Shear mode piezo half-rings are poled around the circumference of the ring (see red arrow below). Epoxy silver electrodes are then applied to the top and bottom surfaces of the ring or to the outer and inner diameters of the ring (see blue surfaces below). Alternative electrode materials will be considered upon customer request.
Shear mode half rings can be manufactured from APC 850, APC 855, APC 840, APC 841, and APC 880 materials.
If desired, APC’s skilled in-house assembly team can bond two shear mode half rings using a conductive epoxy to create a shear cylinder.
Why consider a shear mode piezo half ring?
Sensing applications: piezoelectric ceramics poled in shear mode are approximately 20% more sensitive than piezoelectric ceramics poled in the standard 3-direction.
Piezo motor applications: by bonding two shear mode piezo half rings together with a conductive epoxy the user can easily create a piezo motor that moves in a circular motion.
Is a shear mode piezo half ring from APC right for your application?
Step 1: Calculate the Effective Shear Thickness (EST)
— EST = [(OD + ID)/4] x π
Step 2: Compare the EST to APC’s current manufacturing limitations
— EST < 0.825 in (20.95 mm)
— ID > (EST/6)
Step 3: Contact APC’s helpful sales representatives to discuss your application and receive a quotation.
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