Because of the inverse piezoelectric effect of the piezoelectric ceramic sheet, when the forward voltage is applied to the bimorph, since the two piezoelectric ceramics having an opposite direction of polarization, the electric field directions of the two side surfaces and polarization directions are the same, while the other side of the field direction and polarization in the opposite direction, that is a party to do the expansion vibration, then the other side is doing contraction bending vibration amplitude bimorph change a lot. Displacement. When a negative voltage is applied, the vibration of the upper and lower surfaces of the ceramic sheets are opposite to the previous.
The piezoelectric element has a piezoelectric effect and the piezoelectric effect is reversible. The piezoelectric effect is that when some stress is applied to the crystal in a particular direction, the polarization of the crystal is changed, and the amount of change is proportional to stress is called piezoelectric effect, on the contrary。
Based on the phase transformation toughening effect, tetragonal zirconia is today the highest room temperature mechanical properties of advanced ceramic materials, not only widely used in machinery, chemical industry, but we are using the best ceramic fiber connector ferrule and sleeve fiber optic network material is the most mainstream material. Such high-precision products of complex shapes, sizes required near net injection molding method preparation. But zirconia powder injection molding must have a high sintering activity, while the powder should be mixed with organic matter and easy and has a high solid content
Lead lanthanum zirconate titanate ceramics (PLZT) are of lead zirconate titanate PZT piezoelectric ceramics. Is Haertling GH in 1970 with milling and hot pressing process for the preparation of transparent optical ceramic PLZT.
With electro-acoustic devices testing requirements more perfect, CSI's engineers are constantly developing new products to better suit the needs of the market! Recently introduced a ZC1681B-A piezoelectric ceramic speaker life tester! To better meet the needs of the piezoelectric ceramic loudspeakers life test. The instrument is simple and convenient operation, especially for (mobile phone, MP3, laptop computers, PDAs and other piezoelectric speaker) R & D and QC departments manufacturers use to better assess the quality of products, automatically record the expiration time, no one can duty of long-term trial.
Piezoelectric effect in the performance of the car is, the brake pads contact the rotor in the car at low speed driving process will produce vibrations, sometimes expressed as shrill noise. This noise does not affect the performance of the brake, but would lead to unnecessary replacement brake pads and pads, installing the silencing material and other components used to eliminate noise.
This article explores a new simple method, the piezoelectric ceramic diaphragm cochlear implants, the use of materials, piezoelectric effect, the acoustic signals into electrical signals directly stimulate the auditory nerve to Xin replace expensive, complex electronic cochlea so deaf ear to regain hearing which will benefit hundreds of foolproof deaf patients.
Atmospheric laser transmission, due to the interaction with the turbulence, resulting in fluctuations in amplitude and phase of light waves. Jitter frequency is mainly low-frequency components, the frequency response of the piezoelectric ceramic crystal above 1000Hz, to meet the elimination of atmospheric turbulence caused by the spot jitter.
In many respects, LC filter due to the inductance element can not meet the requirements of limiting the development of modern technology. The piezoelectric ceramic having a mechanical resonance characteristics and energy conversion capability, and a piezoelectric crystal, as has been widely used in the filter art.
Currently, bone conduction hearing device from the formal distinction can be anchored into the bone with an external wearable. Bone anchored in the skull is the anchor for the hearing-impaired patients are more, but this means the application up, not only cause human suffering, and the configuration is very inconvenient to use; wide range of external wearable, normal people can also use the , painless and easy, but its use is in the preliminary stage, the performance and the sound needs to be improved.
