Ferroelectric ceramic material, piezoelectric sensor and preparation method
A technology of ferroelectric ceramics and ferroelectric domains, which is applied in the fields of ferroelectric ceramic materials, piezoelectric sensors and preparation, and can solve the problems of low piezoelectric coefficient of non-lead ceramics.
Active Publication Date: 2021-10-01
XI AN JIAOTONG UNIV
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Problems solved by technology
In response to this problem, a lot of research has been done on piezoelectric materials without lead elements in recent years, but the performance of non-lead ceramics such as piezoelectric coefficients is much lower than that of PZT materials.
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[0030] The following will refer to the attached figure 1 to attach figure 2 Specific examples of the present invention are described in more detail. Although specific embodiments of the invention are shown in the drawings, it should be understood that the invention may be embodied in various forms and is not limited to the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.
[0031] It should be noted that certain terms are used in the specification and claims to refer to specific components. Those skilled in the art should understand that they may use different terms to refer to the same component. The specification and claims do not use differences in nouns as a way of distinguishing components, but use differences in functions of components as a criterion for distinguishing. "Includes" or "comprises" mentioned thr...
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Abstract
Disclosed are a ferroelectric ceramic material, a piezoelectric sensor and a preparation method. The ferroelectric ceramic material has a multi-level ferroelectric domain structure. The preparation method includes: mixing the weighed raw materials and putting them into a ball mill jar to form a mixture, and then Dry the mixture in an oven, put it into a mortar, grind and sieve it to form a powder; put the powder in a crucible and pre-burn it in a muffle furnace at 1350 ° C, and grind the pre-fired powder in a mortar to form Fine powder, add a predetermined mass fraction of polyvinyl alcohol resin and mix evenly, and sieve the secondary powder with a particle size of 0.15mm to 0.28mm; the secondary powder is poured into a stainless steel mold, and the third pressure is maintained under a predetermined pressure. Predetermined time is formed into a blank; the blank is put into the muffle furnace, the temperature is raised to the predetermined temperature, and the fourth predetermined time is kept, the polyvinyl alcohol resin is discharged to form a sample, the sample is put into a crucible, and the powder of the same material is used for embedding. Buried and fired, sintered at 1425-1475°C to form ceramic sheets.
Description
technical field [0001] The invention relates to the technical field of electronic ceramic materials, in particular to a ferroelectric ceramic material, a piezoelectric sensor and a preparation method. Background technique [0002] Piezoelectric material is a functional material that can expand and contract under the applied voltage and generate voltage under the applied force. It is an important sensing dielectric to realize the conversion of mechanical signals and electrical signals. Piezoelectric materials are widely used in the fields of modern industry and national defense. They are important sensing materials in sensing systems, and their information support function is crucial to the rapid development of intelligent systems. [0003] Traditional piezoelectric materials mostly use Pb(Ti, Zr)O 3 (PZT), its piezoelectric coefficient d33 is about 400pC / N, but the lead element in this system is highly toxic, which makes it produce biological toxicity hazards and environmen...
Claims
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IPC IPC(8): C04B35/49C04B35/622C04B35/626C04B35/638C04B35/64C04B41/88H01L41/187H01L41/39H01L41/43G01L1/16G01L9/08H10N30/093H10N30/097H10N30/853
CPCC04B35/49C04B35/622C04B35/6261C04B35/62655C04B35/62645C04B35/638C04B35/64C04B41/88C04B41/5116G01L1/16G01L9/08C04B2235/3215C04B2235/3236C04B2235/3208C04B2235/6562C04B2235/6567H10N30/8536H10N30/093H10N30/097C04B41/4539C04B41/0072
Inventor 高景晖刘泳斌吴明钟力生
Owner XI AN JIAOTONG UNIV