Piezoelectric ceramic preparation method

Abstract

The invention relates to the field of piezoelectric ceramics, in particular to a piezoelectric ceramic preparation method which comprises the following steps: step 1, weighing MgO, Pb3O4, TiO2 and ZrO2, and respectively putting the materials into a ball mill for grinding until the particle size is 500-1000 meshes; step 2, mixing the raw materials ground in the step 1, stirring in a centrifugal stirrer for 3-5 minutes, and then putting into a ball mill for primary ball milling at the ball milling rotating speed of 400-600r / min for 12-24 hours; performing microwave synthesis on the primary ball-milled material to obtain pre-sintered powder; performing granulation and compression molding to obtain a green body, and performing microwave sintering on the green body to obtain the electro-ceramic. According to the preparation method of the piezoelectric ceramic, the raw materials are preliminarily ground and then mixed, the superfine powder is obtained through the microwave radiation synthesis technology after two times of ball milling, microwave sintering is combined, and the preparation process is simple, controllable, green, environmentally friendly and suitable for large-scale production.

Description

Contents of the invention [0001] The invention relates to the field of piezoelectric ceramics, in particular to a preparation method of piezoelectric ceramics. Background technique [0002] The traditional method of preparing piezoelectric ceramics is the solid phase sintering method, which has the advantages of simple operation process and no need for special equipment. Above ℃, the sintering time exceeds 2h, because under the high temperature and long time sintering conditions, the PbO in its components is easy to volatilize (the volatilization temperature is about 800-900℃), which leads to the deviation of the stoichiometric ratio of piezoelectric ceramics, which affects The piezoelectric performance of the material will not cause damage to the human body and pollute the environment; in addition, the sintering temperature is high and the energy consumption is large, which does not conform to the principle of saving costs and reducing energy consumption. [0003] In terms...

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Problems solved by technology

[0002] The traditional method of preparing piezoelectric ceramics is the solid phase sintering method, which has the advantages of simple operation process and no need for special equipment. Above ℃, the sintering time exceeds 2h, because under the high temperature and long time sintering conditions, the PbO in its components is easy to volatilize (the volatilization temperature is about 800-900℃), which leads to the deviation of the stoichiometric ratio of piezoelectric ceramics, which affects The piezoelectric performance of the material will not cause damage to the human body and pollute the environment; in addition, the sintering temperature is high and the energy consumption is large, which does not conform to the principle of saving costs and reducing energy consumption

[0003] In terms of technology, the effect of cooling is mainly achieved by improving the powder preparation process and sintering process; for improving the powder preparation process, the powder of piezoelectric ceramics prepared by traditional methods is obtained through solid-state reaction with oxides as raw materials. The method requires a high calcination temperature, which is very easy to cause particle coarsening and agglomeration of the ceramic powder, and these factors will lead to poor microstructure and properties of piezoelectric ceramics.