Because lead-based piezoelectric ceramics cause serious lead pollution during the manufacturing process, they also seriously endanger human health. Therefore, the development of environmentally friendly lead-free piezoelectric materials has become a top priority. Lead-free niobate-based piezoelectric ceramics have strong ferroelectricity and high Curie temperature, making them more suitable for making ceramics. For this reason, this article needs to study the preparation process, structure and modification of alkali metal niobate lead-free piezoelectric ceramics in order to improve the environmental protection of the prepared materials and the performance of piezoelectric ceramics. In this paper, experimental methods are mainly used to study the performance change and structure transformation of lead-free piezoelectric ceramics mixed with other metal materials after adding alkali metal niobate. In addition, this article analyzes the changes in the dielectric constant, dielectric loss, and Curie temperature of piezoelectric ceramics by means of comparison. It is found that the sintering temperature is 1100℃, and the ceramic has relatively excellent piezoelectric properties in the experiment.

Ruihua Nai. Preparation Process, Structure and Modification of Alkali Metal Niobate Lead-Free Piezoelectric Ceramics. International Journal of Social Sciences and Economic Management (2021), Vol. 2, Issue 1: 33-47. https://doi.org/10.38007/IJSSEM.2021.020104.

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