PZT material Patent--- Piezoelectric Material with High Curie Temperature and Its fabrication Method

2019-01-17

The Piezoelectric Ceramic have piezoelectric properties only in a certain temperature range. It has a critical temperature Tc. When the temperature is higher than Tc, the structure of piezoelectric material changes from ferroelectric phase to paraelectric phase, and the spontaneous polarization disappears. This critical temperature Tc is called Curie temperature of Piezo Ceramic. Therefore, Curie temperature of Piezoelectric ceramic plays an important role in the application of piezoceramic elements. If it is used in high temperature environment, higher Curie temperature of piezoceramic components must be required. Therefore, with the expansion of the use of piezoelectric ceramic, the high temperature environment will be more and more, and the Curie temperature of piezo crystal will have higher requirements.

The object of the invention is to provide a PZT piezoelectric ceramic material with high Curie temperature and a preparation method, which has high piezoelectric performance, higher Curie temperature than conventional material, simple preparation method, easy operation, pollution-free and low cost.

China Patent ZL 2013 1 0300467.3

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