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Lead-free piezoelectric ceramic material and preparation method thereof

A ceramic material, lead-free piezoelectric technology, applied in the field of piezoelectric ceramic materials, can solve the problems of restricting the application of ceramics in actuators, the strain hysteresis of the reach, etc.

Inactive Publication Date: 2021-06-08
XIAN TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing multi-component BNT ceramics cannot realize the regulation of piezoelectric and electro-induced strain simultaneously in the same system, and the large electro-induced strain is often accompanied by a large strain hysteresis, which limits the application of ceramics in actuators.

Method used

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  • Lead-free piezoelectric ceramic material and preparation method thereof
  • Lead-free piezoelectric ceramic material and preparation method thereof
  • Lead-free piezoelectric ceramic material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) with BaCO 3 , ZrO 2 、TiO 2 powder as raw material, according to the chemical formula BaZr 0.055 Ti 0.945 o 3 , weighed according to the stoichiometric ratio;

[0031] (2) Put the powder weighed in step (1) into a ball mill tank, use absolute ethanol as a medium, and use a planetary ball mill to mill for 24 hours;

[0032] (3) Dry the ball-milled slurry in step (2) in a drying oven at 105°C, press it into a Ф60 disc, put it into a corundum crucible, and then put it into a muffle furnace for pre-burning at a temperature of 1200°C. The pre-calcination time is 2 hours, so that the raw materials can fully react to synthesize BaZr 0.055 Ti 0.945 o 3 .

[0033] (4) with Bi 2 o 3 、Na 2 CO 3 、TiO 2 and BaZr 0.055 Ti 0.945 o 3 Powder is the raw material, according to the chemical formula 0.93BNT-0.07BZT, the raw material is weighed according to the stoichiometric ratio;

[0034] (5) Put the powder weighed in step (4) into a ball mill tank, use absolute ethan...

Embodiment 2

[0045] (1) with BaCO 3 , ZrO 2 、TiO 2 powder as raw material, according to the chemical formula BaZr 0.055 Ti 0.945 o 3 , weighed according to the stoichiometric ratio;

[0046] (2) Put the powder weighed in step (1) into a ball mill tank, use absolute ethanol as a medium, and use a planetary ball mill to mill for 24 hours;

[0047] (3) Dry the ball-milled slurry in step (2) in a drying oven at 105°C, press it into a Ф60 disc, put it into a corundum crucible, and then put it into a muffle furnace for pre-burning at a temperature of 1200°C. The pre-calcination time is 2 hours, so that the raw materials can fully react to synthesize BaZr 0.055 Ti 0.945 o 3 .

[0048] (4) with Bi 2 o 3 、Na 2 CO 3 、TiO 2 、K 2 CO 3 , Nb 2 o 5 and BaZr 0.055 Ti 0.945 o 3 Powder is the raw material, according to the chemical formula 0.92BNT-0.07BZT-0.01KNN, the raw material is weighed according to the stoichiometric ratio;

[0049] (5) Put the powder weighed in step (4) into a b...

Embodiment 3

[0060] (1) with BaCO 3 , ZrO 2 、TiO 2 powder as raw material, according to the chemical formula BaZr 0.055 Ti 0.945 o 3 , weighed according to the stoichiometric ratio;

[0061] (2) Put the powder weighed in step (1) into a ball mill tank, use absolute ethanol as a medium, and use a planetary ball mill to mill for 24 hours;

[0062] (3) Dry the ball-milled slurry in step (2) in a drying oven at 105°C, press it into a Ф60 disc, put it into a corundum crucible, and then put it into a muffle furnace for pre-burning at a temperature of 1200°C. The pre-calcination time is 2 hours, so that the raw materials can fully react to synthesize BaZr 0.055 Ti 0.945 o 3 .

[0063] (4) with Bi 2 o 3 、Na 2 CO 3 、TiO 2 、K 2 CO 3 , Nb 2 o 5 and BaZr 0.055 Ti 0.945 o 3 Powder is the raw material, according to the chemical formula 0.91BNT-0.07BZT-0.02KNN, the raw material is weighed according to the stoichiometric ratio;

[0064] (5) Put the powder weighed in step (4) into a b...

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Abstract

The invention discloses a lead-free piezoelectric ceramic material and a preparation method thereof. The molecular formula of the ceramic material is (0.93-x)Bi<0.5>Na<0.5>TiO<3>-0.07Ba(Zr<0.055>Ti<0.945>)O<3>-x(K<0.5>Na<0.5>)NbO<3>, and x is greater than or equal to 0 and less than or equal to 0.07. The preparation method of the ceramic material comprises the following steps: proportioning, ball-milling, pre-sintering, secondary ball-milling, adding an adhesive, sieving and granulating, forming, removing plastic and sintering. The prepared lead-free piezoelectric ceramic has excellent electrical properties, meanwhile, the ceramic material is simple in formula and simple in synthesis process, and can replace PZT ceramic in some aspects.

Description

technical field [0001] The invention relates to the technical field of piezoelectric ceramic materials, in particular to a lead-free piezoelectric ceramic material and a preparation method thereof. Background technique [0002] Piezoelectric ceramics are functional materials that can realize the mutual transformation of electrical properties and mechanical properties, and are the core materials of many electronic devices such as ultrasonic transducers, sensors, and drivers. PZT-based piezoelectric ceramics are the most widely used ceramic materials due to their excellent electrical properties since their discovery. However, lead-based piezoelectric ceramics contain more than 60% lead, which is a toxic substance that will cause harm to humans and the environment during the preparation, use, and disposal of ceramics. [0003] With the enhancement of people's awareness of environmental protection, countries have begun to promulgate laws and regulations to prohibit the use of l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/49
CPCC04B35/49C04B2235/442C04B2235/3298C04B2235/3251C04B2235/96
Inventor 郭菲菲胡浩杰董宏盛王鑫钰袁海晨白伟
Owner XIAN TECH UNIV