A kind of preparation method of bczt-based lead-free piezoelectric ceramics

Abstract

The invention relates to the technical field of preparation of electronic components, in particular to a preparation method of BCZT-based lead-free piezoelectric ceramics. In the present invention, citric acid is dissolved in ethylene glycol, and butyl titanate diluted with absolute ethanol is added to obtain a composite solution, and barium acetate solution, calcium nitrate solution and zirconium nitrate solution are added dropwise to the composite solution and mixed to obtain BCZT-based polymerization The material precursor is mixed with nano-NdFeB powder and nano-iron powder to obtain a magnetic powder slurry, and the hard magnetic powder is mixed with iron / cobalt nano-powder with a core-shell structure and then dispersed at a high speed. Electric ceramics, dense cobalt powder particles, can protect iron powder from oxidation, tetrabutyl titanate reacts with citric acid to form a network structure, zirconium perbarium calcium titanate-based material does not contain Pb, and has little harm to human body and environment. Elemental cobalt will soften at high temperature, which will enhance the bonding force of magnetic materials and reduce the thermal conductivity of magnetic materials. It can work stably in high temperature environments and has broad application prospects.

Description

Technical field [0001] The present invention relates to the technical field of electronic components, and more particularly to a method of preparing BCZT-free lead-lead-lead-resistant ceramics. Background technique [0002] Piezoelectric ceramics are an information function ceramic material capable of converting mechanical energy and electrical energy. The piezoelectric ceramics have dielectric, elasticity, and the like, which have been widely used in medical imaging, acoustic sensors, acoustic transducers, ultrasound motors. [0003] Piezoelectric ceramics use its material under mechanical stress, causing the relative displacement of the internal positive and negative charge center, resulting in a binding charge of a symbol in the surface of the material, which is the opposite to the piezoelectric effect, which is produced, and has sensitive characteristics. At present, the piezoelectric ceramics that my country's piezoelectric ceramics manufacturers can produce is mainly binary...

AI Technical Summary

Problems solved by technology

[0006] The technical problem mainly solved by the present invention is that most of the current piezoelectric ceramics are PZT-based piezoelectric ceramics, and the Pb content of PZT-based piezoelectric ceramics is as high as 60wt.%, which will be harmful to human health during its preparation, use and disposal. The current Curie temperature of undoped lead zirconate titanate ceramic materials is only 380°C, and the Curie temperature of the system will be further reduced by donor and acceptor ion doping, making it difficult to meet the working environment temperature. Higher than 300 ° C and above, the defect that it cannot work stably in a high temperature environment provides a preparation method of BCZT-based lead-free piezoelectric ceramics

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