Barium calcium zirconate titanate leadless piezoelectric ceramic material and preparation method thereof

Abstract

The invention relates to the technical field of inorganic nonmetallic materials, in particular to a barium calcium zirconate titanate leadless piezoelectric ceramic material. A formula comprises components as follows: 91wt.%-98 wt.% of (Ba0.85Ca0.15)(Ti0.9Zr0.1)O3, 0.1 wt.%-7.0wt.% of BiFeO3, 0.01 wt.%-1wt.% of Bi2WO6, 0.1wt.%-4wt% of Ba(Yb1 / 2Nb1 / 2)O3 and 0.01wt.%-1.8wt.% of Co2O3, wherein (Ba0.85Ca0.15)(Ti0.9Zr0.1)O3 is prepared from ordinary chemical raw materials for piezoelectric ceramics, the leadless piezoelectric ceramics which are cadmium-free and have a high-tension electricity property are prepared, the sintering temperature of the piezoelectric ceramics can be greatly reduced, the barium calcium zirconate titanate leadless piezoelectric ceramic material is suitable for preparing a piezoelectric ceramic sensor, and the cost of the piezoelectric ceramics can be greatly reduced.

Description

technical field [0001] The invention relates to the technical field of inorganic non-metallic materials, in particular to a barium calcium zirconate titanate lead-free piezoelectric ceramic material. It adopts common chemical raw materials of piezoelectric ceramics to prepare lead-free piezoelectric ceramics with lead-free and cadmium-free high-voltage performance, and can greatly reduce the sintering temperature of piezoelectric ceramics. The piezoelectric ceramics are suitable for the preparation of piezoelectric ceramic sensors , can greatly reduce the cost of piezoelectric ceramics, conforms to the development direction of piezoelectric ceramics, can replace lead-containing piezoelectric ceramics in applications in some fields, and does not pollute the environment during preparation and use. Background technique [0002] Piezoelectric material is a new type of functional material capable of energy conversion. It can realize the conversion between mechanical energy and el...

AI Technical Summary

Problems solved by technology

Some researchers have used CaTiO 3 -BaZrO 3 -BaTiO 3 compound to form a solid solution, which greatly improves the piezoelectric performance, and the CaTiO obtained by this method 3 -BaZrO 3 -BaTiO 3 Piezoelectric coefficient (d 33 ) is 482PC / N, radial electromechanical coupling coefficient (K P ) is 0.48, however, its Curie temperature is about 90°C, and the sintering temperature of its piezoelectric ceramics is relatively high (1500-1600°C), and it is difficult to apply this system of lead-free piezoelectric ceramics

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