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Efficient Thin Film Piezo Ceramic Element Detection

  • FBT-27TA-4.0A1W200


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Piezo what? Piezoelectricity sounds like a lot to take in, but it’s simple to understand. The word piezoelectric originates from the Greek word piezein, which literally means to squeeze or press. Instead of squeezing grapes to make wine, we’re squeezing crystals to make an electric current! Piezoelectricity is in a ton of everyday electronic devices, from quartz watches to speakers and microphones.

In a nutshell, piezoelectricity is the process of using crystals to convert mechanical energy into electrical energy or vice versa.

piezo element

Regular crystals are defined by their organized and repeating structure of atoms that are held together by bonds, called a unit cell. Most crystals, such as iron, have a symmetrical unit cell. This makes them useless for piezoelectric purposes.

There are other crystals that get lumped together as piezoelectric materials. The structure in these crystals isn’t symmetrical, but they still exist in an electrically neutral balance. However, if you apply mechanical pressure to a piezoelectric crystal, the structure deforms, atoms push around, and you have a crystal that conducts an electrical current. If you take the same piezoelectric crystal and apply an electric current to it, the crystal will expand and contract, converting electrical energy into mechanical energy.


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