The increasingly performance of piezoelectric ceramic materials has made it the most widely used class of functional piezo ceramics. Not only used in industrial and civil products, such as ceramic filters, ceramic discriminators, ceramic attenuators in the communication equipment; underwater acousti

Since the curie brothers discovered the piezoelectric effect of tourmaline in 1880, piezoelectric science has officially entered the stage of human science and technology civilization. Early theoretical research was mainly done by the curie brothers later. In 1881, the curie brothers verified the in

The manufacture of excellent piezoelectric ceramic components usually requires requirements for the performance of piezoelectric ceramics. Because the performance of piezoelectric ceramics has a decisive influence on the quality of components. Therefore, to discuss and understand the components of p

The admittance characteristics are further analyzed based on the obtained equivalent circuit diagram of the piezoelectric ceramics transducer. In order to simplify the derivation, it is assumed that the piezoelectric ceramic transducer has no electrical loss, that is, 0R=0, and the equivalent circui

The mechanical energy of piezoelectric ceramics is converted into electrical energy. The electromechanical coupling coefficient is not only related to material parameters, but also related to the working mode of specific piezoelectric materials. For piezoelectric ceramics, its size is also related t

The effect of pre-firing temperature. When the calcination temperature of piezo ceramic crystals is low, the particle size is fine but the difference is small, the accumulation in the green body is not tight, and the contact points are not much, which is unfavorable. When the calcination temperatur

The sintering conditions of piezoelectric ceramics are mainly composed of four aspects: 1 heating rate; 2 highest sintering temperature; 3 holding time; 4 cooling rate and cooling mode. The general principle for the development of reasonable sintering conditions is to burn high-quality porcelain ( t

Sintering is a process in which heat is used to transform a green body into a dense piezoelectric ceramics body having a certain microstructure. They are sintexring theory points and sintering process, consciously perform the sintering process, here briefly introduce the main points of sintering the

Granulation is a process in which a porcelain PZT material parameter is mixed with a binder to prepare coarser particles (about 20 mesh/inch) having good fluidity. This kind of granule is called a pellet to show the difference.1) The role of granulationSince the ground porcelain powder of sensitive

There are many methods for forming ceramic embryo , such as pressure forming, plastic forming and slurry forming. Each type of forming method can be divided into several specific forming methods of Pzt ceramic disc. It can be selected according to the shape, specification and size of the product, bu

(1) The process method of piezoelectric ceramics is to use a ball mill (drum type, planetary type, agitating type and vibrating type ball mill), and add grinding balls (steel balls, agate balls, zirconium balls, etc.) and media (water, alcohol, etc.) to the raw materials. It is mechanical mixing or

(1) Positive piezoelectric effectIf a pressure F is parallel to the direction of polarization which is applied to the ceramic sheet, the ceramic sheet is compressed, the polarization is reduced, and the free charge of piezoelectric ceramics originally absorbed is released, and a discharge phenomenon

The piezoelectric phenomenon and the piezoelectric effect are that the electronic transducer piezo ceramics column exerts a pressure perpendicular to the electrode surface, which causes deformation and also generates a high voltage discharge. An audible alternating voltage signal is applied to the p

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