CN106278259A - A kind of potassium niobate sodium base leadless piezoelectric - Google Patents
A kind of potassium niobate sodium base leadless piezoelectric Download PDFInfo
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- CN106278259A CN106278259A CN201610485002.3A CN201610485002A CN106278259A CN 106278259 A CN106278259 A CN 106278259A CN 201610485002 A CN201610485002 A CN 201610485002A CN 106278259 A CN106278259 A CN 106278259A
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Abstract
The present invention relates to potassium niobate sodium base leadless piezoelectric, can effectively solve sintering difficulty, product Curie temperature is low, it is difficult to the problem of application, and its technical scheme solved is, a kind of potassium niobate sodium base leadless piezoelectric, its formula is (1x)(0.96K0.48Na0.52NbO3–0.04Bi0.5K0.5ZrO3)–xBaZrO3(it is abbreviated as KNN BKZxBZ) wherein 0≤x≤0.020.Abundant raw material of the present invention, low cost, easily to manufacture, its product piezoelectric property is high, has the strongest practical value, beneficially industrialized production, and economic and social benefit is notable.
Description
Technical field
The present invention relates to piezoelectric, particularly a kind of potassium niobate sodium base leadless piezoelectric.
Background technology
Piezoelectric ceramics is a kind of to realize the critical function material that mechanical energy and electric energy are mutually changed, piezoceramic material because of
It has electromechanical coupling factor height, low price, almost can make arbitrarily requirement shape, be prone to the advantages such as batch production and
It is widely used in the high-tech sectors such as information, laser, navigation, space flight and biology.
1954, after lead base piezoelectric ceramics finds, because of its excellent performance, cheap and easy to get, in the application of whole piezoelectric ceramics
Field is constantly in monopoly position.Although lead base piezoelectric ceramics excellent performance, but its lead oxides (PbO or Pb3O4) ratio weigh about
It is 70%, after preparing at it, use and discarding, removal process can bring serious harm to human health and ecological environment.From people
From the standpoint of class sustainable development, piezoelectric ceramics is unleaded is the final direction developed.
Leadless piezoelectric ceramics mainly has bismuth stratiform system, blue copper system and perovskite series.Bismuth stratiform system, blue copper system pottery pressure
Poor electrical performance, coercive field is big, it is impossible to is applied to transducer, sensor and piezo-activator etc. and requires the field of high tension performance.
Perovskite series leadless piezoelectric ceramics mainly includes barium titanate series (BaTiO3), bismuth-sodium titanate system (Bi0.5Na0.5TiO3) and potassium niobate
Sodium system (K0.5Na0.5NbO3)。BaTiO3(BT) because of its sintering difficulty, Curie temperature low, limit to a certain extent its research with
Application.Bi0.5Na0.5TiO3(BNT) coercive field is too high, there is depolarization temperature and makes it be difficult to apply.
Summary of the invention
For above-mentioned situation, for overcoming the defect of prior art, the purpose of the present invention is just to provide a kind of potassium-sodium niobate-based
Leadless piezoelectric material material, can effectively solve sintering difficulty, and product Curie temperature is low, it is difficult to the problem of application.
The technical scheme that the present invention solves is, a kind of potassium niobate sodium base leadless piezoelectric, its formula is (1-x)
(0.96K0.48Na0.52NbO3–0.04Bi0.5K0.5ZrO3)–xBaZrO3(it is abbreviated as KNN-BKZ-xBZ) wherein 0≤x≤0.020。
Abundant raw material of the present invention, low cost, easily to manufacture, its product piezoelectric property is high, has the strongest practical value,
Being beneficial to industrialized production, economic and social benefit is notable.
Accompanying drawing explanation
Fig. 1 is that present invention pottery is in the XRD figure spectrum that the angle of diffraction 2 θ interval is 20 °～60 °.
Fig. 2 be the present invention pottery 10kHz test frequency under from the change of the dielectric constant with temperature of room temperature to 550 ° C
The temperature that is situated between curve chart.
Detailed description of the invention
Below in conjunction with embodiment, the detailed description of the invention of the present invention is elaborated.
The present invention, in being embodied as, can be given by following example.
Embodiment 1
The present invention is in being embodied as, and a kind of potassium niobate sodium base leadless piezoelectric, its formula is (1-x)
(0.96K0.48Na0.52NbO3–0.04Bi0.5K0.5ZrO3)–xBaZrO3, wherein x is 0, i.e. formula is 0.96K0.48Na0.52NbO3–
0.04Bi0.5K0.5ZrO3。
Embodiment 2
The present invention is in being embodied as, and a kind of potassium niobate sodium base leadless piezoelectric, its formula is (1-x)
(0.96K0.48Na0.52NbO3–0.04Bi0.5K0.5ZrO3)–xBaZrO3, wherein x is 0.01, i.e. formula is 0.99
(0.96K0.48Na0.52NbO3–0.04Bi0.5K0.5ZrO3)–0.01BaZrO3。
Embodiment 3
The present invention is in being embodied as, and a kind of potassium niobate sodium base leadless piezoelectric, its formula is (1-x)
(0.96K0.48Na0.52NbO3–0.04Bi0.5K0.5ZrO3)–xBaZrO3, wherein x is 0.015, i.e. formula is 0.985
(0.96K0.48Na0.52NbO3–0.04Bi0.5K0.5ZrO3)–0.015BaZrO3。
Embodiment 4
The present invention is in being embodied as, and a kind of potassium niobate sodium base leadless piezoelectric, its formula is (1-x)
(0.96K0.48Na0.52NbO3–0.04Bi0.5K0.5ZrO3)–xBaZrO3, wherein x is 0.02, i.e. formula is 0.98
(0.96K0.48Na0.52NbO3–0.04Bi0.5K0.5ZrO3)–0.02BaZrO3。
The present invention in the preparation, can use conventional solid sintering process to be prepared, i.e. with Na2CO3、K2CO3、Nb2O5、
Bi2O3、Zr2O2And BaCO3For raw material, carry out dispensing according to the chemical formula of corresponding leadless piezoelectric ceramics.The raw material that will prepare
(BaZrO3After first ball milling pre-burning, then with other raw material mixing and ball milling) using dehydrated alcohol as ball-milling medium, use rolling ball milling 24h
Post-drying obtains dry powder, by gained dry powder 800～900 DEG C of insulation pre-burnings 4～6h to carry out the synthesis of niobates compound, so
After to add concentration in pre-burned powder be the polyvinyl alcohol water solution pelletize of 8wt%, the consumption of described polyvinyl alcohol water solution
It is limited meeting pelletize requirement (mobility of particle is good, and particle diameter is about 0.1mm), after pelletize, is pressed into φ=10mm with grinding tool,d=
The disk of 1mm binding agent side by side.Finally sintering 2～3h at 1100～1200 DEG C, the potsherd after sintering is by upper silver electrode and puts
Enter in the silicone oil of 25～85 DEG C, under the voltage of 3～4kv/mm polarize 10～20min, after having polarized, by described potsherd from
Silicone oil takes out, after standing 24h in atmosphere, uses ieee standard to measure the electric property of gained leadless piezoelectric ceramics.
It is noted that the innovation of the present invention is the efficient combination of component, it is provided that a kind of new leadless piezoelectric material
Material Chemical composition that, its preparation method is not the technology contents that the application is claimed, as long as using the present invention to provide
No matter the leadless piezoelectric material material that formula is made, be to use which kind of preparation method, be all protection scope of the present invention.
Leadless piezoelectric material material of the present invention, through experimental test, has good piezoelectric property, as a example by embodiment 1-5, when x is
Optimum performance, wherein piezoelectric constant about 295pC/N is obtained when 0.015,kP is about 31%～45%, effectively reduces four directions-orthorhombic phase
Temperature, builds novel phase boundary in room temperature, thus improves the electric property of pottery, meet the needs of piezoelectric in reality, see
Table 1.
Table 1: potassium niobate sodium-based leadless piezoelectric ceramic (1-x)(0.96K0.48Na0.52NbO3–0.04Bi0.5K0.5ZrO3)–xBaZrO3Electric property
| x | d 33(pC/N) | kp(%) | Tan δ (room temperature, 10kHz) | εr(room temperature, 10kHz) |
| 0 | 175 | 31 | 0.022 | 1189 |
| 0.010 | 205 | 32 | 0.021 | 1585 |
| 0.015 | 295 | 41 | 0.032 | 1835 |
| 0.020 | 272 | 36 | 0.035 | 1579 |
The leadless piezoelectric ceramics that the present invention provides is without expensive tantalum element, raw materials used cheap, thus saves into
This, may advantageously facilitate practicalization, apply in the industrial production, and leadless piezoelectric ceramics of the present invention can use raw material of industry warp
Traditional ceramics technology of preparing obtains, and technique simple and stable has good actual application value and commercial value, economical and social
Remarkable benefit.
Claims (5)
1. a potassium niobate sodium base leadless piezoelectric, it is characterised in that this piezoelectric formula is (1-x)
(0.96K0.48Na0.52NbO3–0.04Bi0.5K0.5ZrO3)–xBaZrO3, wherein 0≤x≤0.020。
Potassium niobate sodium base leadless piezoelectric the most according to claim 1, it is characterised in that this piezoelectric formula is
0.96K0.48Na0.52NbO3–0.04Bi0.5K0.5ZrO3。
Potassium niobate sodium base leadless piezoelectric the most according to claim 1, it is characterised in that this piezoelectric formula is
0.99(0.96K0.48Na0.52NbO3–0.04Bi0.5K0.5ZrO3)–0.01BaZrO3。
Potassium niobate sodium base leadless piezoelectric the most according to claim 1, it is characterised in that this piezoelectric formula is
0.985(0.96K0.48Na0.52NbO3–0.04Bi0.5K0.5ZrO3)–0.015BaZrO3。
Potassium niobate sodium base leadless piezoelectric the most according to claim 1, it is characterised in that this piezoelectric formula is
0.98(0.96K0.48Na0.52NbO3–0.04Bi0.5K0.5ZrO3)–0.2BaZrO3。
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108046801A (en) * | 2017-11-20 | 2018-05-18 | 沧州奥力威智能科技有限公司 | Piezoelectric ceramic composition and preparation method thereof |
| CN108275999A (en) * | 2018-04-02 | 2018-07-13 | 齐鲁工业大学 | A kind of preparation method of potassium niobate sodium-based leadless piezoelectric ceramic |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2014087382A1 (en) * | 2012-12-07 | 2014-06-12 | Saint-Gobain Centre De Recherches Et D'etudes Europeen | Product comprising an oriented function and process for obtaining same |
| CN105200405A (en) * | 2015-09-02 | 2015-12-30 | 西安交通大学 | Preparation method of potassium-sodium niobate-barium zirconate-sodium bismuth titanate lead-free piezoelectric film with vertical phase boundary |
-
2016
- 2016-07-25 CN CN201610485002.3A patent/CN106278259A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014087382A1 (en) * | 2012-12-07 | 2014-06-12 | Saint-Gobain Centre De Recherches Et D'etudes Europeen | Product comprising an oriented function and process for obtaining same |
| CN105200405A (en) * | 2015-09-02 | 2015-12-30 | 西安交通大学 | Preparation method of potassium-sodium niobate-barium zirconate-sodium bismuth titanate lead-free piezoelectric film with vertical phase boundary |
Non-Patent Citations (1)
| Title |
|---|
| SHASHA FENG ET AL.: "Lead-free (K, Na)NbO3–Bi0.5K0.5ZrO3–BaZrO3 ternary system:Microstructure and electrical properties", 《JOURNAL OF ALLOYS AND COMPOUNDS》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108046801A (en) * | 2017-11-20 | 2018-05-18 | 沧州奥力威智能科技有限公司 | Piezoelectric ceramic composition and preparation method thereof |
| CN108046801B (en) * | 2017-11-20 | 2021-07-06 | 蔡豪杰 | Piezoelectric ceramic composition and method for producing same |
| CN108275999A (en) * | 2018-04-02 | 2018-07-13 | 齐鲁工业大学 | A kind of preparation method of potassium niobate sodium-based leadless piezoelectric ceramic |
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