What can vibrate (shake) to generate electricity?

Piezoelectric ceramics can vibrate to generate electricity.

The principle of piezoelectric ceramic transducer is that when pressure or tension is applied to this ceramic piece, charges with opposite polarity will be generated at its two ends, and current will be formed through the loop. This effect is called piezoelectric effect. If the transducer made of piezoelectric ceramics is placed in water, under the action of sound waves, charges will be induced at both ends, which is the sound wave receiver. In addition, the piezoelectric effect is reversible. If an alternating electric field is applied to the piezoelectric ceramic sheet, the ceramic sheet will become thinner and thicker from time to time, and at the same time it will vibrate and emit sound waves. This solves the problem of ultrasonic transmitter.

How do piezoelectric ceramics convert mechanical energy into electrical energy?

Under the action of mechanical stress, some materials cause relative displacement and polarization of internal positive and negative charge centers, which leads to the phenomenon of bound charges with opposite signs on the surfaces of both ends of the material, which is called piezoelectric effect. Ceramics with this characteristic become piezoelectric ceramics, and their surface charge density is proportional to mechanical stress. On the contrary, under the action of external electric field, the internal positive and negative charge centers of this kind of substance will shift, which will also lead to mechanical deformation of the substance, and the size of the formation is directly proportional to the energy intensity of tea.

Piezoelectric ceramic igniter Piezoelectric ceramic is a kind of functional ceramic material that can convert mechanical energy and electrical energy into each other. What kind of material is piezoelectric ceramic? Piezoelectric ceramics belong to inorganic nonmetallic materials. This is a material with piezoelectric effect. The so-called piezoelectric effect refers to the deformation of some media under the action of force, which makes the surface of the media charged. This is a positive piezoelectric effect. On the contrary, when an exciting electric field is applied, the medium will be mechanically deformed, which is the so-called inverse piezoelectric effect. This wonderful effect has been applied by scientists in many fields closely related to people's lives, realizing energy conversion, sensing, driving, frequency control and other functions.