Barium zirconate titanate calcium-based piezoelectric ceramic and preparation method thereof

A technology of barium calcium zirconate titanate and electric ceramics, which is applied in the field of piezoelectric ceramic electronic components, can solve the problems of high investment in precision equipment, complex processes, and large fluctuations in electrical properties of ceramic materials, and achieve high densification and electrical performance. The effects of excellent performance, considerable application value and commercial prospects

Inactive Publication Date: 2017-07-28
XINYANG NORMAL UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the electrical properties of ceramics have been improved to a certain extent, most of these precision equipment have high investment, complicat...

Method used

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  • Barium zirconate titanate calcium-based piezoelectric ceramic and preparation method thereof
  • Barium zirconate titanate calcium-based piezoelectric ceramic and preparation method thereof
  • Barium zirconate titanate calcium-based piezoelectric ceramic and preparation method thereof

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preparation example Construction

[0031] Such as figure 1 As shown, the preparation method of the barium calcium zirconate titanate-based piezoelectric ceramics comprises the following steps:

[0032] 1) Dissolve tetrabutyl titanate in ethylene glycol and alcohol, then add the mixed solution of citric acid and alcohol to the above solution dropwise, and stir at room temperature for 0.5-1 hour to obtain clear solution 1;

[0033] 2) Dissolve barium acetate weighed according to the molar ratio of metal ions in the chemical formula in deionized water, and then add it dropwise to the clear solution 1 prepared in step 1) at a temperature of 50~65°C, and stir for 0.5~1 hour Prepare a homogeneous solution 2;

[0034] 3) Dissolve zirconium nitrate and calcium nitrate weighed according to the molar ratio of metal ions in the chemical formula respectively in deionized water, and add dropwise to the homogeneous solution prepared in step 2) in the order of first adding zirconium nitrate and then adding calcium nitrate ...

Embodiment 1

[0042] Preparation of Ba 0.85 Ca 0.15 Ti 0.90 Zr 0.10 o 3 Ceramics: Dissolve 3.0632g of tetrabutyl titanate in a mixed solution of 7.5ml of alcohol and 12ml of ethylene glycol, and stir thoroughly at room temperature for 1 hour; add the mixed solution of 6.3042g of citric acid and 2.7642g of alcohol to the above solution dropwise , stirred at room temperature for 45 minutes to obtain a clear solution 1; 2.1711 g of barium acetate was dissolved in deionized water, and added dropwise to the clear solution 1 at a temperature of 55 ° C, and stirred for 1 hour to obtain a homogeneous solution 2; 0.4293 g of zirconium nitrate and 0.3542g of calcium nitrate were dissolved in deionized water respectively, and were added to solution 2 in the order of adding dropwise zirconium nitrate first and then calcium nitrate, and stirred at a temperature of 80°C for 40 minutes to obtain a uniform and stable chelate sol; The sol was coked in a muffle furnace at 380°C for 1.5 hours to obtain a ...

Embodiment 2

[0045] Preparation of Ba 0.85 Ca 0.15 Ti 0.95 Zr 0.05 o 3 Ceramics: Dissolve 3.2334g of tetrabutyl titanate in a mixed solution of 8ml of alcohol and 13ml of ethylene glycol, and stir thoroughly at room temperature for 1 hour; add the mixed solution of 6.6544g of citric acid and 2.9178g of alcohol dropwise to the above solution, Stir at room temperature for 45 minutes to obtain a clear solution 1; 2.1711 g of barium acetate was dissolved in deionized water, and added dropwise to a temperature of 55 ° C in the clear solution 1, and stirred for 1 hour to obtain a homogeneous solution 2; 0.2147 g of zirconium nitrate was mixed with 0.3542g of calcium nitrate was dissolved in deionized water respectively, and added to solution 2 in the order of first adding zirconium nitrate dropwise and then adding calcium nitrate dropwise, and stirring at a temperature of 80°C for 40 minutes to obtain a uniform and stable chelate sol; Coke in a muffle furnace at 380°C for 1.5 hours to obtain...

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Abstract

The invention relates to barium zirconate titanate calcium-based piezoelectric ceramic and a preparation method thereof, belonging to the technical field of piezoelectric ceramic electronic components and devices. The ceramic has a chemical constitution represented by a general formula as follows: Ba1-xCaxTi1-yZryO3. The preparation method comprises the following steps: preparing chelate sol from tetrabutyl titanate, citric acid, barium acetate, calcium nitrate, zirconium nitrate, glycol, alcohol and the like in a molar mass/volume ratio, and coking and calcining the sol, so as to obtain nano-powder; and carrying out granulation, dry-pressure formation and glue discharging on the nano-powder, heating to 1250-1290 DEG C, stopping heating, and carrying out furnace cooling until the sintering temperature is 1150-1250 DEG C, so as to obtain the ceramic. After the ceramic is subjected to polishing, silver coating and polarization, measurement shows that the ceramic has excellent electrical properties: the piezoelectric coefficient d33 is equal to 479pC/N-634pC/N, and the maximum relative dielectric constant epsilonr is equal to 12328-13582.

Description

technical field [0001] The invention relates to the technical field of piezoelectric ceramic electronic components, in particular to barium calcium zirconate titanate-based piezoelectric ceramics and a preparation method thereof. Background technique [0002] Barium calcium zirconate titanate-based lead-free piezoelectric ceramics (called BCZT-based ceramics) materials are recognized as "the future pillar of the electronic ceramics industry". Replacing lead-containing materials with BCZT-based ceramic materials can not only reduce environmental pollution, but also effectively convert sound, heat, light, electricity and other signals into signals that can be collected and manipulated. Indispensable in the selection of materials for electronic components such as devices. With the continuous development of the field of electronic ceramics, higher requirements are put forward for the sensitivity of the electrical properties of piezoelectric materials, which can receive, convert...

Claims

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Application Information

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IPC IPC(8): C04B35/49C04B35/64C04B35/626
CPCC04B35/49C04B35/6261C04B35/62675C04B35/62695C04B35/64C04B2235/443C04B2235/48C04B2235/96
Inventor 田永尚李水云刘鹏李天天于永生唐旖天井强山
Owner XINYANG NORMAL UNIVERSITY
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