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SBT-based piezoelectric ceramic capable of being used for vibration measurement below 500 DEG C and preparation method and application thereof

A technology of vibration measurement and piezoelectric ceramics, applied in the field of material science and engineering, can solve problems such as difficult to take into account, and achieve the effect of increasing Curie temperature, improving piezoelectric performance and temperature stability, and optimizing microdomain characteristics

Active Publication Date: 2021-03-09
四川亚美电陶科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for piezoelectric ceramics, the piezoelectric performance and Curie temperature usually trade off each other, and it is difficult to balance

Method used

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  • SBT-based piezoelectric ceramic capable of being used for vibration measurement below 500 DEG C and preparation method and application thereof
  • SBT-based piezoelectric ceramic capable of being used for vibration measurement below 500 DEG C and preparation method and application thereof
  • SBT-based piezoelectric ceramic capable of being used for vibration measurement below 500 DEG C and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] In this example, the SBT-based piezoelectric ceramics that can be used for vibration measurement below 500°C, the preparation method includes the following steps:

[0045] (1) Ingredients / ball milling

[0046] First, the chemical raw material of analytical grade: strontium carbonate (SrCO 3 ), bismuth oxide (Bi 2 o 3), titanium dioxide (TiO 2 ) and dopant: gadolinium oxide (Gd 2 o 3 ), according to the chemical formula Sr 0.92 Gd 0.053 Bi 4 Ti 4 o 15 Accurately weigh the ingredients according to the calculated dosage ratio, put the prepared raw materials into a polytetrafluoroethylene ball mill tank, use absolute ethanol as the dispersion medium, and mill with a planetary ball mill for 6 hours at a speed of 300 rpm. The slurry was taken out, dried in a blast drying oven, put into a corundum crucible, placed in a box-type high-temperature furnace, heated to 850°C at a heating rate of 5°C / min, and then kept for 4 hours. After naturally cooling to room temperatu...

Embodiment 2

[0055] In this example, the SBT-based piezoelectric ceramics that can be used for vibration measurement below 500°C, the preparation method includes the following steps:

[0056] (1) Ingredients / ball milling

[0057] Chemical raw materials of pure grade will be analyzed: strontium carbonate (SrCO 3 ), bismuth oxide (Bi 2 o 3 ), titanium dioxide (TiO 2 ) and dopant: gadolinium oxide (Gd 2 o 3 ), according to the chemical formula Sr 0.92 Gd 0.053 Bi 4 Ti 4 o 15 Accurately weigh the ingredients according to the calculated dosage ratio, put the prepared raw materials in a polytetrafluoroethylene ball mill tank, use absolute ethanol as the dispersion medium, and use a planetary ball mill for 6 hours at a speed of 300rpm. Take out the slurry, dry it in a blast drying oven, put it into a corundum crucible, place it in a box-type high-temperature furnace, raise the temperature to 850°C at a rate of 5°C / min, and keep it for 4 hours. Obtain the SGBT precursor.

[0058] Accur...

Embodiment 3

[0066] In this example, the SBT-based piezoelectric ceramics that can be used for vibration measurement below 500°C, the preparation method includes the following steps:

[0067] (1) Ingredients / ball milling

[0068] Chemical raw materials of pure grade will be analyzed: strontium carbonate (SrCO 3 ), bismuth oxide (Bi 2 o 3 ), titanium dioxide (TiO 2 ) and dopant: gadolinium oxide (Gd 2 o 3 ), according to the chemical formula Sr 0.92 Gd 0.053 Bi 4 Ti 4 o 15 Accurately weigh the ingredients according to the calculated dosage ratio, put the prepared raw materials into a polytetrafluoroethylene ball mill tank, use absolute ethanol as the dispersion medium, and mill with a planetary ball mill for 6 hours at a speed of 300 rpm. Take out the slurry, dry it in a blast drying oven, put it in a corundum crucible, put it in a box-type high-temperature furnace, raise the temperature to 850°C at a rate of 5°C / min, keep it for 4 hours, and take it out after natural cooling in t...

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Abstract

The invention discloses an SBT-based piezoelectric ceramic capable of being used for vibration measurement below 500 DEG C as well as a preparation method and application thereof. The piezoelectric ceramic is composed of the following components: Sr1-3x / 2AxBi4Ti4O15+y wt% M[alpha]O[beta], in the general formula, A is one of Gd and Ce,M[alpha]O[beta] is one of MnO2, Cr2O3, Gd2O3, and CeO2, y wt% represents the mass percentage of a corresponding component inSr1-3x / 2AxBi4Ti4O15, x is equal to 0-0.1, y is equal to 0-0.5, and x and y are not equal to 0 at the same time. The SBT-based piezoelectricceramic is prepared by adopting a traditional solid-phase sintering method through the technological processes of ball milling, calcining, forming, sintering, polarizing and the like, and can be applied to a vibration measuring device. The SBT-based piezoelectric ceramic has a high Curie temperature, a piezoelectric coefficient, a low dielectric constant temperature coefficient and excellent temperature stability, and can be prepared from common chemically pure raw materials through a traditional electronic ceramic preparation technology. The preparation method is mature in process, simple inflow, easy to implement and beneficial to industrial large-scale production.

Description

technical field [0001] The invention belongs to the field of material science and engineering, and specifically relates to a SBT-based piezoelectric ceramic that can be used for vibration measurement below 500°C, a preparation method and application thereof. Background technique [0002] Aeroengines need to monitor and analyze the operating status of the entire equipment during the research and development stage, and collect vibration signals through vibration measurement devices for necessary spectrum processing and envelope processing to determine the structural defects of the engine (such as rotor imbalance, etc.) and potential threaten. However, the temperature of the engine in the running state is very high (such as the temperature of the compressor casing, accessory casing, etc., usually above 200°C), and some core parts (such as near the combustion chamber) often exceed 300°C, and it is necessary to load it. High-temperature vibration measuring devices are used to mo...

Claims

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Application Information

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IPC IPC(8): C04B35/475C04B35/622C04B41/88G01H11/08H01L41/187H01L41/43
CPCC04B35/475C04B35/622C04B41/5116C04B41/88G01H11/08C04B2235/3213C04B2235/3298C04B2235/3224C04B2235/3267C04B2235/3229C04B2235/3241H10N30/8561H10N30/097
Inventor 不公告发明人
Owner 四川亚美电陶科技有限公司
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