Preparation method of gradient ceramic piezoelectric material, piezoelectric material and piezoelectric sensor
A ceramic piezoelectric, piezoelectric material technology, applied to piezoelectric/electrostrictive/magnetostrictive devices, fabrication/assembly of piezoelectric/electrostrictive devices, materials for piezoelectric devices or electrostrictive devices Selecting the same direction can solve the problems of limited application and low Curie temperature, and achieve the effect of improving temperature stability
Active Publication Date: 2020-10-09
XI AN JIAOTONG UNIV
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- Application Information
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Problems solved by technology
However, the Curie temperature is low (T C =120℃) limits its application in piezoelectric sensors
Method used
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[0034] The following will refer to the attached Figure 1 to Figure 3 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.
[0035] 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 throughout ...
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Abstract
The invention discloses a preparation method of a gradient ceramic piezoelectric material, the piezoelectric material and a piezoelectric sensor, and the preparation method comprises the following steps: determining the components of each layer of the gradient ceramic piezoelectric material, and weighing the raw materials of each layer based on the components; respectively putting the raw materials into a ball milling tank, carrying out ball milling at a preset frequency for a first moment, heating to a first temperature, and calcining for a second moment to obtain pre-sintered samples of eachlayer; screening out sample particles of each layer with the particle size of 0.15-0.28 mm; putting a first layer of sample particles with preset weight into a mold and flattening the surfaces of thesample particles until the sample particles with the preset weight in all layers are sequentially flattened and molded in a mold; and keeping the pressure of the preset pressure at a third moment toobtain a laminated sample, putting the laminated sample into a muffle furnace, sintering at 1450 DEG C at a fourth moment to obtain a laminated ceramic sample, polishing the surface of the laminated ceramic sample, cutting the laminated ceramic sample along the component change direction, and carrying out metal spraying treatment on the cutting surfaces on the two sides to obtain the gradient ceramic piezoelectric material.
Description
technical field [0001] The invention relates to the technical field of electronic ceramic materials, in particular to a preparation method of a gradient ceramic piezoelectric material, a piezoelectric material, and a piezoelectric sensor. Background technique [0002] Piezoelectric sensors can convert vibration energy into electrical energy, play a vital role in the detection of pressure and vibration, and have been widely used in power equipment to evaluate their reliability / fault issues. Traditionally, piezoelectric materials have been dominated by lead zirconate titanate (PZT) ceramics, however, PZT-based ceramics have been banned worldwide due to their toxicity and environmental pollution. In recent years, lead-free piezoelectric materials have attracted widespread attention, and researchers have made many efforts to develop high-performance lead-free piezoelectric materials to replace PZT. [0003] Barium titanate (BT), an important dielectric material, is considered a...
Claims
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IPC IPC(8): C04B35/468C04B35/626H01L41/113H01L41/18H01L41/187H01L41/37H01L41/39H01L41/43H10N30/092H10N30/093H10N30/097H10N30/30H10N30/85H10N30/853
CPCC04B35/468C04B35/6261C04B2235/3244C04B2235/3232C04B2235/3208C04B2235/75H10N30/302H10N30/852H10N30/8536H10N30/092H10N30/093H10N30/097
Inventor 高景晖吴明姚睿丰刘泳斌赵铜鑫钟力生
Owner XI AN JIAOTONG UNIV