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Large-strain electrostriction ceramic material and preparation method thereof

A ceramic material and stretching technology, which is applied in the field of large-strain electrostrictive ceramic materials and its preparation, can solve the development needs and strains of displacement actuators and large-energy electroacoustic transducers that are difficult to meet large strains Small problems, to achieve the effect of high electromechanical conversion efficiency, large mechanical thrust, wide operating temperature range

Inactive Publication Date: 2009-09-23
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the disadvantages of piezoelectric materials are that they are only suitable for the conditions of small applied electric field strength, and the generated strain is relatively small, which makes it difficult to meet the development needs of large strain displacement actuators and large energy electroacoustic transducers.

Method used

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  • Large-strain electrostriction ceramic material and preparation method thereof
  • Large-strain electrostriction ceramic material and preparation method thereof
  • Large-strain electrostriction ceramic material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0020] As PbO: 43mol%, ZrO 2 : 35mol%, SnO 2 : 10mol%, TiO 2 : 5mol%, BaO: 5mol%, La 2 o 3 : 4mol% raw material ratio weighing. Deionized water is used as a medium, zirconia balls are used as grinding balls, and the weight ratio of raw materials, deionized water and zirconia balls is 0.8:1.0:3.0. The above raw materials were ball milled for 6 hours, and then dried at 120° C. for 24 hours. Through the ball milling process, the raw materials are ground into powders with an average particle size of less than 1 μm. Press the powder into a block, place it in an aluminum oxide crucible and seal it with a cover. The precursor with perovskite crystal phase was pre-fired at 850°C for 4 hours. Dry the calcined block after secondary ball milling. The powder after the secondary ball milling is made into a green body through granulation, compaction, plastic discharge and other processes. Place the biscuit in an aluminum oxide crucible, cover and seal it, and heat it in an electric...

Embodiment 2

[0023] As PbO: 44mol%, ZrO 2 : 25mol%, SnO 2 : 15mol%, TiO 2 : 10mol%, La 2 o 3 : 6mol%, BaO: 3mol% raw material ratio weighing. Chemically pure anhydrous ethanol is used as a medium, zirconia balls are used as grinding balls, and the weight ratio of raw materials, deionized water and zirconia balls is 0.6:1.2:3.0. The above raw materials were ball milled for 6 hours, and then dried at 60° C. for 12 hours. Through the ball milling process, the raw materials are ground into powders with an average particle size of less than 1 μm. Press the powder into a block, place it in an aluminum oxide crucible and seal it with a cover. The precursor with the perovskite crystal phase was pre-fired at 800°C for 6 hours. Dry the calcined block after secondary ball milling. The powder after the secondary ball milling is made into a green body through granulation, compaction, plastic discharge and other processes. Place the biscuit in an aluminum oxide crucible, cover and seal it, and ...

Embodiment 3

[0025] As PbO: 45mol%, ZrO 2 : 27mol%, SnO 2 : 13mol%, TiO 2 : 10mol%, La 2 o 3 : 8mol%, BaO: 1mol% raw material ratio weighing. Deionized water is used as a medium, zirconia balls are used as grinding balls, and the weight ratio of raw materials, deionized water and zirconia balls is 0.8:1.0:3. The above raw materials were ball milled for 5 hours, and then dried at 110° C. for 48 hours. Through the ball milling process, the raw materials are ground into powders with an average particle size of less than 1 μm. Press the powder into a block, place it in an aluminum oxide crucible and seal it with a cover. The precursor with the perovskite crystal phase was pre-fired at 900°C for 3 hours. Dry the calcined block after secondary ball milling. The powder after the secondary ball milling is made into a green body through granulation, compaction, plastic discharge and other processes. Place the biscuit in an aluminum oxide crucible, cover and seal it, and heat it in an elect...

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Abstract

The invention discloses a large-strain electrostriction ceramic material and a preparation method thereof. The large-strain electrostriction ceramic material comprises the following metal oxides by molar percentage: 40-45 of PbO, 25-35 of ArO2, 10-15 of SnO2, 5-10 of TiO2, 4-8 of La2O3 and 1-5 of BaO. The ceramic material is prepared with a solid phase sintering method, is preserved in heat for a short time in a high-temperature area and sintered in a lower-temperature area for a long time under a heat preservation state so as to obtain the ceramic material with uniform grain size and dense ceramic quality. The longitudinal electrostriction S33 of the electrostriction ceramic material reaches 0.3 percent, and the electro-mechanical transformation efficiency reaches 50 percent. The large-strain electrostriction ceramic material has the characteristics of large electrostriction, large mechanical thrust force and high electro-mechanical transformation efficiency and is suitable for manufacturing large-displacement actuators and macro-energy electroacoustic transducers.

Description

technical field [0001] The invention belongs to the technical field of electromechanical transducer materials for converting electric energy into mechanical energy, and in particular relates to a large-strain electrostrictive ceramic material and a preparation method thereof. Background technique [0002] Electrostrictive materials that can convert electrical energy into mechanical displacement and vibration energy are useful in the technical fields of making actuators for precise control of mechanical displacement and making electroacoustic converters for active sonar and ultrasonic generators. Widespread demand. At present, the piezoelectric material is widely used in the industry, and the inverse piezoelectric effect of the piezoelectric material is used to convert the electrical energy into mechanical energy by applying an electric field to make the piezoelectric material strain. The advantage of piezoelectric materials is that the material can be strained by applying a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/49C04B35/622
Inventor 冯玉军张娜徐卓魏晓勇
Owner XI AN JIAOTONG UNIV
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