Preparation method of gradient ceramic piezoelectric material, piezoelectric material, and piezoelectric sensor
A ceramic piezoelectric, piezoelectric material technology, applied in piezoelectric/electrostrictive/magnetostrictive devices, manufacturing/assembly of piezoelectric/electrostrictive devices, materials for piezoelectric devices or electrostrictive devices Selecting the same direction can solve the problems of low Curie temperature and limited application
Active Publication Date: 2021-07-06
XI AN JIAOTONG UNIV
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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
Disclosed are a preparation method of a gradient ceramic piezoelectric material, a piezoelectric material, and a piezoelectric sensor. The preparation method includes determining the composition of each layer of the gradient ceramic piezoelectric material, and weighing the raw materials of each layer based on the composition; putting the raw materials into a ball mill respectively Pre-fired samples of each layer are obtained by ball milling at a predetermined frequency in the tank at the first moment, heated to the first temperature and calcined at the second moment; the sample particles of each layer with a particle size of 0.15 mm to 0.28 mm are screened out; Put the weight of the sample particles into the mold and make the surface smooth until the predetermined weight of the sample particles of all layers are sequentially paved and formed in the mold, and then kept under the pressure of the predetermined pressure for the third moment to obtain the laminated sample, the laminated sample Put it into a muffle furnace and sinter at 1450°C at the fourth moment to obtain a laminated ceramic sample, polish the surface of the laminated ceramic sample, cut the laminated ceramic sample along the direction of composition change, and spray gold on the cut surfaces on both sides to obtain Gradient Ceramic Piezoelectric Materials.
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