Barium titanate piezoelectric ceramics (3BaTiO. Barium titanate is the first piezoelectric ceramic made and widely used, and its electromechanical coupling coefficient is very high. Compared with other piezoelectric ceramics, it has a lower curie point and its electromechanical.The performance is ve

(1) Dielectric constant εThe dielectric constant is a reflection of the dielectric properties of a material, or the nature of polarization, and is usually expressed . Piezoelectric ceramic components for different purposes have different dielectric constant requirements for piezoelectric ceramics. F

At first, we tried to measure the DC high-voltage gear of the ordinary pointer type multi-meter. It was found that the voltage of the two electrodes of piezoelectric ceramics can only slightly shake the pointer when the black plastic pressure bar of the ignition element is pressed. The reason for th

Different application ranges have different performance requirements for piezoelectric ceramic materials. 1 Perovskite piezoelectric ceramic material, the chemical formula is ABO3, A is a positive ion with a large radius, which can be +1, +2, +3; B is a positive ion with a small radius, which can be

What’s the polarization process of piezoelectric ceramicsThe polarization process of piezo ceramics refers to adding a strong DC electric field to the piezoelectric ceramic to align the domains in the ceramic in the direction of the electric field. Only the ceramics processed by the

Piezoelectric constant d33 of piezoelectric ceramics is a linear response coefficient that reflects the mutual coupling between the mechanical quantity (stress or strain) and the electrical quantity (electrical displacement or electric field). When a compressive stress T3 is applied along the polari

Piezoelectric ceramics is a new type functional ceramic material. It is a kind of ceramic material that converts mechanical energy into electrical energy. This feature can be used to make high-precision instruments, which plays a vital role in industrial production. An important topic is an importan

A filter is a circuit or device that is selective to the frequency of the signal. To separate a signal at a certain frequency or a signal in a certain frequency band from a signal with a wide frequency range, a filter is required. For example, in multi-channel communication, if two or more people on

Sonar is a very important naval equipment, and it has received great attention from all countries with the using of underwater weapons such as submarines. Here, we don't discuss a specific equipment, nor do we involve too many mathematical concepts. Instead, we start with a simple physical principle

The main material of the traditional sonar array hydrophone is piezoelectric ceramics, and the development of new materials can greatly improve the sonar performance. Today's new materials are piezoelectric polymers and optical fibers. Among the piezoelectric polymer materials currently are used for

As an important equipment for detecting submarines, sonar has undergone decades of development. From the sonar equipment are used in the national equipment.the sonar technology researched and developed, the future development trend of sonar technology can be summarized as follows,piezo ceramic conti

Sonar is an electronic equipment that uses sound waves propagating in the ocean to detect targets and locate, identify and track targets. Piezo ceramic ring transducer is the most widely used and most important underwater acoustic equipment in hydroacoustics. Sonar technology refers to the technolog

Materials and design of piezoelectric ceramic transformers Materials for piezoelectric ceramic transformers: It has a high electromechanical coupling coefficient, especially the transverse electromechanical coupling coefficient k31 and the longitudinal electromechanical coupling coefficient k33 o

A silver electrode of piezoelectric ceramics is applied to the upper and lower sides of the left half to be polarized in the thickness direction. When an alternating electric field is applied, the piezo ceramic sheet vibrates, and this portion is the driving portion. The silver electrode is applied