Piezoelectric ceramic material and preparation method

A technology of piezoelectric ceramics and powder materials, applied in the field of piezoelectric ceramic materials and preparation, can solve problems such as environmental and human health hazards, and achieve the effects of wide application range, simple and stable process, and convenient industrial production

Active Publication Date: 2020-01-21
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, such materials contain a large amount of volatile lead elements, accounting for about 70% of the total raw materials, which will cause serious harm to the environment and human health during production, use and recycling

Method used

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  • Piezoelectric ceramic material and preparation method
  • Piezoelectric ceramic material and preparation method
  • Piezoelectric ceramic material and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] Choose x to be 1.4% in the general formula, R is potassium element, then the chemical formula of the piezoelectric ceramic material of embodiment 1 is:

[0071] 0.946K 0.48 Na 0.52 Nb 0.95 Sb 0.05 o 3 -0.04Bi 0.5 (Na 0.82 K 0.18 ) 0.5 ZrO 3 -0.4% Fe 2 o 3 -1.4%KSbO 3 , then the method for preparing the piezoelectric ceramic is:

[0072] To analyze pure Na 2 CO 3 , K 2 CO 3 , Nb 2 o 5 , Sb 2 o 3 , Bi 2 o 3 , ZrO 2 , Fe 2 o 3 As the raw material, each raw material is accurately weighed according to the molar percentage; the weighed raw material is used as the ball milling medium with absolute ethanol, and then rolled and ball milled for 24 hours and then dried to obtain a mixed dry powder; the obtained dry powder is kept at 850°C for 6 hours , then add the polyvinyl alcohol aqueous solution granulation that concentration is 8wt% in the powder material of pre-burning again; After granulation, use the abrasive tool that diameter is 10mm to press und...

Embodiment 2

[0074] Choose x to be 1.6% in the general formula, R is potassium element, then the chemical formula of the piezoelectric ceramic material of embodiment 2 is:

[0075] 0.944K 0.48 Na 0.52 Nb 0.95 Sb 0.05 o 3 -0.04Bi 0.5 (Na 0.82 K 0.18 ) 0.5 ZrO 3 -0.4% Fe 2 o 3 -1.6%KSbO 3 . The method for preparing the piezoelectric ceramic in Example 2 of the present invention is similar to that in Example 1, except that the molar ratio of raw materials is weighed and prepared according to the chemical formula in Example 2.

Embodiment 3

[0077] Choose x to be 1.8% in the general formula, R is potassium element, then the piezoelectric ceramic material of embodiment 3 is:

[0078] 0.942K 0.48 Na 0.52 Nb 0.95 Sb 0.05 o 3 -0.04Bi 0.5 (Na 0.82 K 0.18 ) 0.5 ZrO 3 -0.4% Fe 2 o 3 -1.8%KSbO 3 .

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Abstract

The invention discloses a piezoelectric ceramic material and a preparation method thereof. The general chemical formula of the piezoelectric ceramic material is shown in the specification, (0.96-X)K<0.48>Na<0.52>Nb<0.95>Sb<0.05>O<3>-0.04Bi<0.5>(Na<0.82>K<0.18>)<0.5>ZrO<3>-0.4%Fe2O3-xRSbO3, wherein the R is an alkali metal element, the x is the molar percentage of antimonate RSbO3, and the x is greater than or equal to 1.4% and less than or equal to 2.5%. The piezoelectric ceramic material provided by the embodiment of the invention has a relatively high piezoelectric constant and a relativelyhigh planar electromechanical coupling coefficient, and has a wide application range. In addition, the piezoelectric ceramic material provided by the embodiment of the invention does not contain a lead element, belongs to an environment-friendly material, conforms to the sustainable development strategy in the current international social development, and is beneficial to environmental protection.

Description

technical field [0001] The invention relates to the technical field of piezoelectric ceramics, in particular to a piezoelectric ceramic material and a preparation method. Background technique [0002] Since the discovery of the strong piezoelectric effect in barium titanate in the 1940s, piezoelectric ceramics with a perovskite structure have gradually attracted people's attention. The piezoelectric effect is an electromechanical coupling effect that can realize mutual conversion between mechanical energy and electrical energy. Piezoelectric materials with piezoelectric effect are widely used in technical fields such as information, optoelectronics, precision control, and non-destructive testing. The application of piezoelectric materials not only provides assistance and convenience for human daily production and life, but also involves high-level international safety precautions. technology field. Piezoelectric ceramics are an important new functional material, and the pi...

Claims

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Application Information

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IPC IPC(8): C04B35/495C04B41/88
CPCC04B35/495C04B41/009C04B41/5116C04B41/88C04B2235/3248C04B2235/3272C04B2235/3294C04B2235/3298C04B2235/442C04B2235/96
Inventor 吴家刚陶红郑婷
Owner SICHUAN UNIV
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