(2) The concept of "dielectric relaxant" is put forward.
(3) The influence of oxygen vacancies on the electrical transport characteristics and polarization mechanism of dielectric oxides is revealed.
(4) Propose a "multipolar mechanism" model.
(5) High performance ferroelectric and electrostrictive polymer materials. The potential application of this material can be said to be an artificial "muscle" executive system and can also be used in space. The electrostrictive piezoelectric polymer material working at low temperature in space has also been developed for the first time in the world. This material (device) is of great significance to the development of high-precision radar (antenna) for large-scale solar power stations and space stations.
(6) Multinational invention patents for lead-free electronic materials: The European Parliament passed regulations to restrict the use of lead in electronic products, and so did Japan. In recent years, Chen Ang cooperated with Dr. Zhiyu to obtain lead-free electronic materials with superior performance. 20 1 1 The invention patents authorized by the United States, Japan and Germany are being examined and approved in China and the European Union (including Britain and France). The patent has a wide range of applications: in the high-tech field, it can be used to make high-performance storage devices and ultra-high-precision displacement devices, and in the large-scale technical field, it can be used to make piezoelectric devices and capacitors. This invention obtained three patents in university of akron, 20 1 1.
(7) New generation microwave communication core material technology: The core material of new generation microwave communication and radar system (such as phased array radar) is variable frequency microwave dielectric material. But the microwave loss of materials or devices is the key to practical application. This study reveals the loss mechanism of variable frequency microwave materials and obtains high performance materials. These works are important progress in the research project of the Office of Advanced Materials of the US Department of Defense. The internal report of "Variable Frequency Microwave Dielectric Materials and Devices" was published at the internal seminar.
(8) High-performance piezoelectric materials: As the main researcher, I participated in the research project of the US Department of the Navy: "High-performance piezoelectric materials". They have developed high-performance piezoelectric single crystals, ceramics and polymer films, which are widely used in sonar, piezoelectric sensors and piezoelectric motors.
(9) Sintering microwave ceramics at low temperature.