Bimorph piezoelectric device

These companies can supply piezoelectric material and devices such as tubes, stacked assemblies, unimorphs, and bimorphs. 

The MASIF (measurements and analysis of surface interaction and forces) force measuring device is based on a bimorph force sensor [47]. The bimorph consists of two piezoelectric plates glued together with opposing... 

The first commercial piezoelectric BaTiOs devices were phonograph pickups marketed by Sonotome Corporation in the mid-1940s. These used a so-called bimorph design in which an electrode layer separated two strips of the piezoelectric material. Bimorphs are no longer used for this application because they do not produce a high enough quality sound reproduction and most people use CDs now. 

Piezoelectric scanners Piezoelectrics are materials whose dimensions deform in response to an applied electric field. If the voltages that are applied to a piezoelectric are precisely controlled, extremely precise movements can be performed. The geometry of piezoelectric positioning devices used in STM includes bars, bimorphs, or tubes tubular scanners are the most commonly used. They operate at a high resonant frequency, enabling high scan rates. Thermal isolation of the piezoelectric elements is necessary since these ceramics are also sensitive to... 

For speakers or buzzers, audible by humans, devices with a rather low resonance frequency are used (kilohertz range). Examples are a bimorph consisting of two piezoceramic plates bonded together, and a piezoelectric fork consisting of a piezodevice and a metal fork. A piezoelectric buzzer is shown in Figure 4.1.12, which has merits such as high electric power efficiency, compact size and long life. 

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