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

A technology based on lead-free piezoelectric and ceramics, applied in the direction of piezoelectric/electrostrictive/magnetostrictive devices, circuits, electrical components, etc., can solve the problems of unstable work, lower Curie temperature of the system, health and survival Environmental hazards and other issues, to achieve the effect of low reactivity, not easy to oxidize and corrode

Active Publication Date: 2021-07-30
景德镇市鑫惠康电子有限责任公司
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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

Method used

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

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Embodiment Construction

[0024]According to the weight of the weight, 3 to 4 copies of citric acid were dissolved in 10 to 12 parts of ethylene glycol, heated to 80 to 90 ° C, resulting in a mixture, and then 0.5 ~ 1.0 parts of titanate titanate 5 ~ After dilution of waterless ethanol, the mixture was stirred and stirred for 2.0 to 2.5 h, and the composite liquid was obtained, and the composite liquid was cooled to 40 to 50 ° C, and 13 to 15 parts by mass of mass fraction was continued to 25%. The strontium acetate solution, stirring reaction to 1.0 to 1.5 h, sequentially added 3 to 4 parts of mass fraction of 10% nitrate solution, 0.5 ~ 0.8 parts mass fraction of 20% nitrate solution, mix and mix the BCZT-based polymer The body; in a blast dryer of the BCZT-based polymer is placed in a blast dryer set at a set temperature of 100 to 120 ° C, drying 7 to 8 h to obtain BCZT-based gel, a BCZT in a muffle in a temperature of 450 to 500 ° C The base gel coking treatment is 4 to 5 hours to obtain a black foam, ...

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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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/49C04B35/468C04B35/465C04B35/622H01L41/187H10N30/853
CPCC04B35/465C04B35/468C04B35/49C04B35/622C04B2235/405H10N30/8536
Inventor 沈春霞何伟仁张建初
Owner 景德镇市鑫惠康电子有限责任公司
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