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Preparation method of barium calcium zirconate titanate lead-free piezoelectric textured ceramic

A barium calcium zirconate titanate, lead-free piezoelectric technology, applied in the preparation of barium calcium zirconate titanate lead-free piezoelectric textured ceramics, textured barium calcium zirconate titanate ceramic materials and its preparation field, can solve the unfavorable Large-scale production and industrialization of materials, complex processes, expensive equipment, etc., to achieve good grain orientation, excellent performance, and improved piezoelectric coefficients

Inactive Publication Date: 2016-03-23
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, according to the preparation method of the pulling method provided by this patent, the process is complex, time-consuming, and the equipment is expensive, which is not conducive to the large-scale production and industrialization of materials. Therefore, by using the piezoelectric anisotropy of the piezoelectric crystal itself , by means of microstructure control, the anisotropic grains in the microstructure of piezoelectric ceramic materials are arranged regularly along certain specific directions, and polycrystalline ceramics with specific grain orientations are prepared.

Method used

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  • Preparation method of barium calcium zirconate titanate lead-free piezoelectric textured ceramic
  • Preparation method of barium calcium zirconate titanate lead-free piezoelectric textured ceramic
  • Preparation method of barium calcium zirconate titanate lead-free piezoelectric textured ceramic

Examples

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Embodiment 1

[0033] CaTiO 3 , BaZrO 3 , BaTiO 3 Powder, flaky BaTiO 3 Template according to molecular formula Ba 0.85 Ca 0.15 Ti 0.90 Zr 0.10 o 3 Dosing, where flaky BaTiO 3 The amount of template added is 0.30wt%; BaTiO will not be added 3 The matrix powder of the template is mixed with a solvent with a mass ratio of 1:0.82 (the solvent is a blend of ethanol and methyl ethyl ketone at a mass ratio of 2:3), and 2wt% dispersant polyvinyl alcohol is added, and the planetary ball mill is used for 4 hours; 1.5wt% Plasticizer polyethylene glycol 400, 2wt% plasticizer dibutyl phthalate, 4wt% binder polyvinyl alcohol, rolling ball mill for 24 hours; adding 0.30wt% flake BaTiO 3 The template is ball milled for 1 hour; the casting operation is performed with a tape casting machine, and cutting is performed after drying; then, the casting green sheet is laminated at a temperature of 70°C and a pressure of 100 MPa, and the laminated green sheet is cut and glued; After debinding, the green s...

Embodiment 2

[0035] CaTiO 3 , BaZrO 3 , BaTiO 3 Powder, flaky BaTiO 3 Template according to molecular formula Ba 0.85 Ca 0.15 Ti 0.90 Zr 0.10 o 3 Dosing, where flaky BaTiO 3 Template addition is 42wt%; BaTiO will not be added 3 The matrix powder of the template is mixed with a solvent with a mass ratio of 1:1 (the solvent is a blend of ethanol and methyl ethyl ketone at a mass ratio of 2:3), and 1wt% dispersant polyvinyl alcohol is added, and the planetary ball mill is used for 8 hours; 1.5wt% Plasticizer polyethylene glycol 400, 1wt% plasticizer dibutyl phthalate, 3wt% binder polyvinyl alcohol, rolling ball mill for 48 hours; adding 42wt% flake BaTiO 3 The template was ball milled for 3 hours; the cast operation was carried out with a tape casting machine, and then cut after drying; then the cast blank was laminated at a temperature of 80°C and a pressure of 80MPa, and the laminated blank was cut and glued; After debinding, the green sheet is isostatically pressed at room temper...

Embodiment 3

[0037] The green raw material obtained in this embodiment is BaCO 3 , CaCO 3 , ZrO 2 、TiO 2 Powder, flaky BaTiO 3 template, according to the formula Ba 0.85 Ca 0.15 Ti 0.90 Zr 0.10 o 3 Dosing, where flaky BaTiO 3 The added amount of the template is 42wt%; and sintered at 1500° C. for 5 hours, and the others are the same as in Example 2. The sintered dense sample is ground, polished and coated with silver, and its piezoelectric coefficient d is measured. 33 It is 483pC / N.

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Abstract

The invention relates to a preparation method of a barium calcium zirconate titanate lead-free piezoelectric textured ceramic. The composition of the barium calcium zirconate titanate lead-free piezoelectric textured ceramic is Ba0.85Ca0.15Ti0.90Zr0.10O3. During preparation, no lead oxide is used, and the environmental requirement can be guaranteed to the utmost extent; and compared with the ceramic with the same components prepared in the prior art, XRD (X-ray diffraction) characterization proves that crystal particles of the ceramic are arranged along the <001> direction, so that a material can fully utilize the anisotropy of a piezoelectric material, the piezoelectric coefficient of the material is improved, the texture degree of the material is as high as 96%, and the piezoelectric constant of the material can be more than 290 pC / N. The preparation method of the barium calcium zirconate titanate lead-free piezoelectric textured ceramic can avoid separate preparation of a template and slurry, and unchanged material composition can be accurately guaranteed.

Description

technical field [0001] The invention belongs to the field of lead-free piezoelectric materials, in particular to a method for preparing barium calcium zirconate titanate lead-free piezoelectric textured ceramics; especially textured barium calcium zirconate titanate (Ba 0.85 Ca 0.15 Ti 0.90 Zr 0.10 o 3 , referred to as BCZT) ceramic materials and preparation methods thereof. Background technique [0002] In 1945, researchers discovered BaTiO 3 Since the crystal has the piezoelectric effect, people have more and more understanding of the performance of inorganic piezoelectric materials. Today, it can be made into devices such as sensors, brakes and frequency converters, and is widely used in high-tech fields such as electronics, lasers, navigation and biology. For a long time, commonly used piezoelectric ceramics are generally lead-containing systems, such as PbZr x Ti 1-x o 3 (PZT), Pb(Mg 1 / 3 Nb 2 / 3 )O 3 -PbTiO 3 (PMN-PT) and Pb(Zn 1 / 3 Nb 2 / 3 )O 3 -PbTiO 3 (...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/49C04B35/622
Inventor 赵志浩李晓雷戴叶婧季惠明
Owner TIANJIN UNIV
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