Views:8 Author:Site Editor Publish Time: 2017-09-11 Origin:Site
prospect of piezoelectric ceramics
After several decades of research, piezoelectric ceramics has made significant progress, which has become one of the most important functional PZT materials in China and abroad, widely used in electronics, radar, micro-displacement control, aerospace technology and computer and other high-tech fields. For PZT Piezoelectric ceramics develop its hot trends in the future (1) PLZT transparent ceramic. Transparent ferroelectric ceramics with ferroelectricity, dielectric, electro-optical, piezoelectric and pyroelectric, it has an important position in the field of ferroelectric, which is suitable for a variety of types of devices. (2) low -temperature sintering PZT ceramic materials by the new technology . The development of PZT piezoelectric disc is using low temperature sintering,which not only can effectively guarantee the performance of ceramic materials, but also can greatly save energy and friendly- environmental . (3) multi-functional ferroelectric ceramics. The use of ceramic material multiplication effect, additive effect, and the relationship between the different degree of coupling can develop multi-functional and new ferroelectric ceramic materials. At present, there are optical coupling ,magnetoelectric coupling and magneto-optical coupling.(4) series of lead-free piezoelectric ceramics . As the PZT-based piezoelectric ceramic contains a lot of lead composition, the manufacturing process is easy to cause environmental pollution, so series of lead-free piezoelectric ceramics research has been quietly rising, but not as good as PZT performance, need to continue to improve. (5) Piezoelectric composite material. Compared with the traditional piezoelectric ceramics, with better flexibility and mechanical processing performance, low sound velocity, low density, easy to air, water and biological organization to achieve acoustic impedance matching. (6) Nano-ceramics. In order to overcome the brittle and easy processing of ceramics, nano-ceramic came into being. Ceramic made with nano-materials has good mechanical properties, ductility, toughness and easy molding and so on. In short, with the deepening of the research work, piezoelectric ring ceramic preparation process will be more perfect, more excellent performance, will be in the field of acoustics and information engineering play an important role.