Application and preparation method of a ceramic material as a high-temperature stable piezoelectric energy harvesting material

Abstract

The invention belongs to the field of piezoceramic materials and discloses application of a ceramic material as a high-temperature stable piezoelectric energy collection material and a preparation method. A matrix chemical composition of the ceramic material is (1-x)BiScO3-xPbTiO3, wherein x and 1-x refer to mole fractions of PbTiO3 and BiScO3 respectively, and a value range of x is 0.55-0.70. Theceramic material applied as the high-temperature stable piezoelectric energy collection material is high in energy conversion coefficient and low energy conversion coefficient temperature change rate, wherein at a temperature of 200 DEG C, the energy conversion coefficient is d33*g33=8950*10<-15>m<2> / N; in a wide temperature range of 25-300 DEG C, the energy conversion coefficient temperature change rate (d33*g33)N is smaller than or equal to + / -6%. The ceramic material is applied to high-temperature piezoelectric energy collection devices, waste vibration energy in high-temperature environments can be efficiently recycled, and remarkable social significance and economic value are achieved.

Description

technical field [0001] The invention belongs to the field of piezoelectric ceramic materials, in particular to a ceramic material with high conversion coefficient and low temperature change rate of the conversion coefficient, which is applied to high-temperature piezoelectric energy collection devices, and a preparation method thereof. Background technique [0002] With the increasingly serious problem of energy shortage, the development and utilization of new energy has become the focus of attention of all countries. Piezoelectric energy harvesting devices can efficiently recycle the discarded vibration energy in the environment, which is of great significance for realizing the self-power supply of micro-devices such as sensors, and has been widely used in medical, communication and other fields of life and work. At present, the most typical piezoelectric material is the PZT system material, whose Curie temperature is about 180-386°C, but the actual safe use temperature is ...

AI Technical Summary

Problems solved by technology

In the piezoelectric ceramic material system, materials with high Curie temperature mainly include bismuth layer structure system and tungsten bronze structure system, but their piezoelectric activity is low, which cannot meet the requirements of high-power piezoelectric energy harvesting devices.

Images