CN101538155A - Large-strain electrostriction ceramic material and preparation method thereof - Google Patents
Large-strain electrostriction ceramic material and preparation method thereof Download PDFInfo
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- CN101538155A CN101538155A CN200910021571A CN200910021571A CN101538155A CN 101538155 A CN101538155 A CN 101538155A CN 200910021571 A CN200910021571 A CN 200910021571A CN 200910021571 A CN200910021571 A CN 200910021571A CN 101538155 A CN101538155 A CN 101538155A
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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
The invention belongs to the electromechanical transducer material technology field that electric energy conversion is become mechanical energy, particularly a kind of large-strain electrostriction ceramic material and preparation method thereof.
Background technology
Can become electric energy conversion the electrostriction material of mechanical shift and vibrational energy to be used for accurately controlling the actuator of mechanical shift and to make the technical fields such as electroacoustic transducer that are used for active sonar, ultrasonic generator demand is widely arranged in making.Industry member is a piezoelectric widely-usedly at present, utilizes the inverse piezoelectric effect of piezoelectric to make piezoelectric generation strain be mechanical energy to electric energy conversion by applying electric field.The advantage of piezoelectric is to apply little strength of electric field just can make the material production strain, and the dependent variable that produces is linear with the strength of electric field that applies.But the shortcoming that piezoelectric exists is the condition that only is applicable to little extra electric field intensity, and the dependent variable that produces is also smaller, is difficult to satisfy the displacement actuator of big dependent variable and the growth requirement of macro-energy electroacoustics transducer.
Summary of the invention
The purpose of this invention is to provide a kind of large-strain electrostriction ceramic material and preparation method thereof, this method can produce big dependent variable and great machinery thrust, have the electrostriction ceramics material of high electromechanical conversion efficiency simultaneously, to satisfy the material requirements of making big displacement actuator and macro-energy electroacoustics transducer by applying electric field.
Large-strain electrostriction ceramic material of the present invention is made up of the oxide compound that contains chemical element Pb, Zr, Sn, Ti, La, Ba, and raw material comprises metal oxide, carbonate, the oxyhydroxide that contains above-mentioned chemical element.The molar percentage that contains above-mentioned chemical element metal oxide is: PbO:40-45%, ZrO
2: 25-35%, SnO
2: 10-15%, TiO
2: 5-10%, La
2O
3: 4-8%, BaO:1-5%.
The material purity that requirement contains chemical element Pb, Zr, Sn, Ti, La, Ba reaches the pure above grade of chemical analysis, and the average particle size of raw material is less than 1 μ m;
The preparation method of large-strain electrostriction ceramic material is as follows:
1) mixing according to the above-mentioned raw materials ratio, is medium with deionized water or the pure dehydrated alcohol of chemical analysis, ball milling 4-6 hour, obtains mixing the tiny powder of particle;
2) with the powder behind the ball milling at insulation oven dry back briquetting, be placed in the aluminium sesquioxide crucible and seal, in 800-900 ℃ of insulation pre-burning in 3-6 hour;
3) block after the pre-burning is pulverized after ball milling 4-6 hour once more, oven dry then;
4) through granulation, pressed compact, the conventional operation of plastic removal the powder of oven dry is processed into biscuit;
5) biscuit is placed in the aluminium sesquioxide crucible seals, sintering in the plumbous atmosphere of richness, ceramic post sintering adopts 100-180 ℃/hour temperature rise rate to 1340-1380 ℃ of insulation 10-30 minute, with 2-6 ℃/minute rate of temperature fall furnace temperature is reduced to 1280-1300 ℃, be incubated 2-3 hour, then, adopt 100-150 ℃/hour rate of temperature fall that furnace temperature is reduced to room temperature;
6) pottery that will burn till is placed in the oxygen-enriched atmosphere and did anneal in 4-12 hour 800-900 ℃ of insulation, promptly gets large-strain electrostriction ceramic material.
Adopt material prescription of the present invention and preparation method, can produce vertical electric field induced strain amount S
33The electrostriction ceramics material that reach 0.3%, electromechanical conversion efficiency reaches the big strain more than 50%, high electromechanical conversion efficiency.This stupalith and have big mechanical thrust and wide operating temperature range.
Description of drawings
Fig. 1 is the longitudinal strain amount S of embodiment 1 sample
33With the change curve that adds the sinusoidal alternating electric field strength E.
Fig. 2 is the longitudinal strain amount S of embodiment 2 samples
33With the change curve that adds the sinusoidal alternating electric field strength E.
Fig. 3 is the longitudinal strain amount S of embodiment 3 samples
33With the change curve that adds the sinusoidal alternating electric field strength E.
Below in conjunction with accompanying drawing content of the present invention is described in further detail.
Embodiment
The present invention is not limited to these embodiment, all can reach purpose of the present invention in material prescription scope of the present invention and preparation method.
Embodiment 1:
According to PbO:43mol%, ZrO
2: 35mol%, SnO
2: 10mol%, TiO
2: 5mol%, BaO:5mol%, La
2O
3: the proportioning raw materials weighing of 4mol%.Adopt deionized water as medium, zirconia ball is as abrading-ball, and the weight ratio of raw material, deionized water and zirconia ball is 0.8: 1.0: 3.0.Above-mentioned raw materials was carried out ball milling 6 hours, then in 120 ℃ of insulations oven dry in 24 hours.Through the ball milling operation raw material is ground to form the powder of average particle size below 1 μ m.Pressed by powder is become block, be placed in the aluminium sesquioxide crucible and seal.Burnt till presoma in 4 hours in advance 850 ℃ of insulations with perovskite crystal phase.To dry behind the pre-burning piece secondary ball milling.Powder behind the secondary ball milling is made into biscuit through operations such as granulation, pressed compact, plastic removals.Biscuit is placed in the aluminium sesquioxide crucible seals, in electric furnace, adopt 100 ℃/hour temperature rise rate to 1360 ℃ insulation 30 minutes.With 3 ℃/minute rate of temperature fall furnace temperature is dropped to 1300 ℃, 1300 ℃ of insulations 3 hours.Then, adopt 100 ℃/hour rate of temperature fall that furnace temperature is reduced to room temperature.The pottery that burns till has the perovskite crystal phase structure.The pottery that burns till is placed in the oxygen-enriched atmosphere 800 ℃ of insulations did anneal in 12 hours.
According to the service requirements of electromechanical transducer the thin slice of the ceramic shaped and size of burning till.After the ceramic plate surface finish is cleaned, adopt the silver ink firing prepared to go out the metal electrode face and be made into element of transducer.According to the service requirements of transverter, to a plurality of elements superpose and electricity on series-parallel connection, be assembled into big displacement actuator or macro-energy electroacoustics transducer.Among Fig. 1, X-coordinate is the sinusoidal alternating electric field strength E that adds, and ordinate zou is the longitudinal strain amount S of embodiment 1 sample along the electric field strength E direction
33This figure explanation can produce big longitudinal strain amount by applying big strength of electric field electrostriction ceramics material of the present invention.
Embodiment 2:
According to PbO:44mol%, ZrO
2: 25mol%, SnO
2: 15mol%, TiO
2: 10mol%, La
2O
3: 6mol%, the proportioning raw materials weighing of BaO:3mol%.Adopt the pure dehydrated alcohol of chemical analysis as medium, zirconia ball is as abrading-ball, and the weight ratio of raw material, deionized water and zirconia ball is 0.6: 1.2: 3.0.Above-mentioned raw materials was carried out ball milling 6 hours, then in 60 ℃ of insulations oven dry in 12 hours.Through the ball milling operation raw material is ground to form the powder of average particle size below 1 μ m.Pressed by powder is become block, be placed in the aluminium sesquioxide crucible and seal.Burnt till presoma in 6 hours in advance 800 ℃ of insulations with perovskite crystal phase.To dry behind the pre-burning piece secondary ball milling.Powder behind the secondary ball milling is made into biscuit through operations such as granulation, pressed compact, plastic removals.Biscuit is placed in the aluminium sesquioxide crucible seals, in electric furnace, adopt 120 ℃/hour temperature rise rate to 1380 ℃ insulation 10 minutes.With 4 ℃/minute rate of temperature fall furnace temperature is dropped to 1280 ℃, 1280 ℃ of insulations 3 hours.Then, adopt 120 ℃/hour rate of temperature fall that furnace temperature is reduced to room temperature.The pottery that burns till has the perovskite crystal phase structure.The pottery that burns till is placed in the oxygen-enriched atmosphere 850 ℃ of insulations did anneal in 8 hours.Among Fig. 2, X-coordinate is the sinusoidal alternating electric field strength E that adds, and ordinate zou is the longitudinal strain amount Ss of embodiment 2 samples along the electric field strength E direction
33This figure explanation by regulating the proportioning of each chemical constitution in the electrostriction ceramics material of the present invention, can obtain the electric field induced strain curve near linear performance.
Embodiment 3:
According to PbO:45mol%, ZrO
2: 27mol%, SnO
2: 13mol%, TiO
2: 10mol%, La
2O
3: 8mol%, the proportioning raw materials weighing of BaO:1mol%.Adopt deionized water as medium, zirconia ball is as abrading-ball, and the weight ratio of raw material, deionized water and zirconia ball is 0.8: 1.0: 3.Above-mentioned raw materials was carried out ball milling 5 hours, then in 110 ℃ of insulations oven dry in 48 hours.Through the ball milling operation raw material is ground to form the powder of average particle size below 1 μ m.Pressed by powder is become block, be placed in the aluminium sesquioxide crucible and seal.Burnt till presoma in 3 hours in advance 900 ℃ of insulations with perovskite crystal phase.To dry behind the pre-burning piece secondary ball milling.Powder behind the secondary ball milling is made into biscuit through operations such as granulation, pressed compact, plastic removals.Biscuit is placed in the aluminium sesquioxide crucible seals, in electric furnace, adopt 150 ℃/hour temperature rise rate to 1360 ℃ insulation 20 minutes.With 3 ℃/minute rate of temperature fall furnace temperature is dropped to 1300 ℃, 1300 ℃ of insulations 2 hours.Then, adopt 150 ℃/hour rate of temperature fall that furnace temperature is reduced to room temperature.The pottery that burns till has the perovskite crystal phase structure.The pottery that burns till is placed in the oxygen-enriched atmosphere 900 ℃ of insulations did anneal in 4 hours.Among Fig. 3, X-coordinate is the sinusoidal alternating electric field strength E that adds, and ordinate zou is the longitudinal strain amount Ss of embodiment 3 samples along the electric field strength E direction
33This figure explanation by regulating the proportioning of each chemical constitution in the electrostriction ceramics material of the present invention, can obtain the very little electric field induced strain curve of electric hysteresis.
Claims (2)
1, a kind of large-strain electrostriction ceramic material is characterized in that, the mole proportioning of this material metal oxide compound is: PbO:40-45%, ZrO
2: 25-35%, SnO
2: 10-15%, TiO
2: 5-10%, La
2O
3: 4-8%, BaO:1-5%.
2, a kind of preparation method of large-strain electrostriction ceramic material as claimed in claim 1 is characterized in that:
Carry out according to the following steps:
1) mixing according to the above-mentioned raw materials ratio, is medium with deionized water or the pure dehydrated alcohol of chemical analysis, ball milling 4-6 hour, obtains mixing the tiny powder of particle;
2) with the powder behind the ball milling at insulation oven dry back briquetting, be placed in the aluminium sesquioxide crucible and seal, in 800-900 ℃ of insulation pre-burning in 3-6 hour;
3) block after the pre-burning is pulverized after ball milling 4-6 hour once more, oven dry then;
4) through granulation, pressed compact, the conventional operation of plastic removal the powder of oven dry is processed into biscuit;
5) biscuit is placed in the aluminium sesquioxide crucible seals, sintering in the plumbous atmosphere of richness, ceramic post sintering adopts 100-180 ℃/hour temperature rise rate to 1340-1380 ℃ of insulation 10-30 minute, with 2-6 ℃/minute rate of temperature fall furnace temperature is reduced to 1280-1300 ℃, be incubated 2-3 hour, then, adopt 100-150 ℃/hour rate of temperature fall that furnace temperature is reduced to room temperature;
6) pottery that will burn till is placed in the oxygen-enriched atmosphere and did anneal in 4-12 hour 800-900 ℃ of insulation, promptly gets large-strain electrostriction ceramic material.
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102684649A (en) * | 2012-05-02 | 2012-09-19 | 西安交通大学 | Cylindrical ferroelectric pulse generator |
CN103435095A (en) * | 2013-08-14 | 2013-12-11 | 西安工程大学 | Method for preparing nano tin dioxide/composited nano tin dioxide through high-energy ball milling method |
-
2009
- 2009-03-17 CN CN200910021571A patent/CN101538155A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102684649A (en) * | 2012-05-02 | 2012-09-19 | 西安交通大学 | Cylindrical ferroelectric pulse generator |
CN103435095A (en) * | 2013-08-14 | 2013-12-11 | 西安工程大学 | Method for preparing nano tin dioxide/composited nano tin dioxide through high-energy ball milling method |
CN103435095B (en) * | 2013-08-14 | 2016-01-20 | 西安工程大学 | High-energy ball milling method prepares the method for nano-stannic oxide/composite Nano tindioxide |
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