CN101386536B - Addition for reducing piezoelectric ceramics sintering temperature of electro-acoustic conversion device - Google Patents
Addition for reducing piezoelectric ceramics sintering temperature of electro-acoustic conversion device Download PDFInfo
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- CN101386536B CN101386536B CN2008101550554A CN200810155055A CN101386536B CN 101386536 B CN101386536 B CN 101386536B CN 2008101550554 A CN2008101550554 A CN 2008101550554A CN 200810155055 A CN200810155055 A CN 200810155055A CN 101386536 B CN101386536 B CN 101386536B
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- additive
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Abstract
The present invention provides an additive for reducing sintering temperature of piezoelectric ceramics of an electroacoustic transducer, which relates to the technical field of inorganic non-metal material. The additive is characterized in that the addition quantity of the additive for reducing the sintering temperature (in weight percentage) is 4 to 12 percent of the total additive quantity, and the additive comprises the following compositions in weight percentage: 0 to 10 percent of V2O5, 0 to 10 percent of Li2Co3, and 0 to 10 percent of ZnO. The performance of the piezoelectric ceramics of the electroacoustic transducer prepared from the additive of the invention is as follows: specific inductive capacity is between 2,500 and 3,500, dielectric loss is less than or equal to 2.0 percent, planar electromechanical coupling factor is more than or equal to 65 percent, piezoelectric strain constant is more than or equal to 450pC/N, mechanical quality factor is between 70 and 450, and sintering temperature is between 960 and 1,000 DEG C. The additive can reduce the sintering temperature of the piezoelectric ceramics to obtain the piezoelectric ceramics with low-temperature sintering (between960 and 1,000 DEG C) high-tension electricity performance, can greatly reduce the cost of a piezoelectric ceramic device, and can inhibit the volatilization of lead oxide to accord with the requirement on environmental protection.
Description
Technical field
The present invention relates to technical field of inorganic nonmetallic materials, refer in particular to a kind of additive that is used to reduce piezoelectric ceramics sintering temperature of electro-acoustic conversion device, adopt special additive (V
2O
5Or V
2O
5+ Li
2CO
3Or Li
2CO
3+ ZnO or V
2O
5+ Li
2CO
3+ ZnO) reduce sintering temperature of piezoelectric ceramics, obtain the piezoelectric ceramics of low-temperature sintering (960～1000 ℃) high tension performance, this piezoelectric ceramics is suitable for preparing piezoelectric ceramics buzzing sheet, multilayer piezoelectric ceramic device, electroacoustic transducer, sonac etc.Can reduce simultaneously the cost of piezoelectric ceramic devices greatly, and the volatilization of energy inhibited oxidation lead, compliance with environmental protection requirements.
Technical background
Piezoelectric ceramics is a kind of functional materials of realizing that mechanical energy and electric energy are changed mutually, is widely used in military affairs, automobile, commerce and field of medical technology.At present, because the piezoelectric property and zirconium Titanium lead plumbate (PZT) base piezoelectric ceramic of leadless piezoelectric ceramics differ bigger.The production of piezoelectric ceramics still concentrates on traditional PZT base and ternary thereof, four-component-system piezoelectric ceramics.But the content of plumbous oxide surpasses more than 60% of raw material total mass in the PZT base pottery.Plumbous oxide is a kind of toxic substance of easy volatile, if work long hours in having the environment of plumbous oxide, these plumbous oxide will be accumulated in the human body, causes brain and neural system to sustain damage.As sintering temperature being reduced to about 960～1000 ℃, volatilization that then can inhibited oxidation lead, compliance with environmental protection requirements can open burning simultaneously, and binder removal and sintering are disposable to be finished, and simplifies technology, reduces cost; Simultaneously can adopt the interior electrode of Ag/Pd=90/10～95/5 (weight percent) alloy electrode, can reduce cost greatly as multilayer piezoelectric device.Therefore, realize that PZT base piezoelectric ceramic low-temperature sintering has following meaning: (1) can cut down the consumption of energy, and (2) can reduce the volatilization of plumbous oxide, avoids the fluctuation of ceramic component and off-design to form, and improves the qualification rate of product.Eliminate the environmental problem that the plumbous oxide volatilization is brought simultaneously.(3) need not to seal sintering in the piezoelectric ceramics sintering process, the binder removal sintering is disposable to be finished, and simplifies technology, reduces cost.(4) in multilayer piezoelectric device preparation, reduce sintering temperature, can adopt the high Pd/Ag alloy of Ag or Ag content etc. as interior electrode, reduce the cost of multilayer piezoelectric device.Therefore, the low-temperature sintering of research PZT base piezoelectric ceramic is significant.
Chinese periodical " Shaanxi Normal University's journal (natural science edition) " the 3rd phase in 2007 is at " YMnO
3Doping quaternary system PZT-PFW-PMN piezoelectric ceramics Research on electrical properties " a kind of low-temperature melt piezoelectric ceramic is disclosed in the literary composition, its sintering temperature is 1020 ℃, its piezoelectric property is piezoelectric strain constant d
33=341pC/N, planar electromechanical coupling factor Kp=0.574, its piezoelectric property is far below patent of the present invention.Adopt YMnO
3Reduce sintering temperature, need synthetic YMnO
3, cost height and complex process.Prescription is formed and is different from this patent.The additive that reduces sintering temperature is different from this patent.
2006 the 4th phases of Chinese periodical " silicate journal " are at " low-temperature sintering PZT-0.5%PbOWO
3Piezoelectric ceramics " a kind of low-temperature melt piezoelectric ceramic is disclosed in the literary composition, its sintering temperature is 1100 ℃, its piezoelectricity and dielectric properties are: d
33=364pC/N, Kp=0.596, specific inductivity are 1593.Its piezoelectric property is far below patent of the present invention.Adopt PbOWO
3Doping vario-property PZT is to reduce sintering temperature.Prescription is formed and is different from this patent.The additive that reduces sintering temperature is different from this patent.
2006 the 6th phases of Chinese periodical " Chinese pottery " are at " BiFeO
3Influence to 0.02PNW-0.07MnN-0.91PZT low-temperature sintered ceramics microtexture and piezoelectric property " a kind of low-temperature melt piezoelectric ceramic is disclosed in the literary composition, its sintering temperature is 950 ℃, its piezoelectric property is: d
33=320pC/N, Kp=0.50.Its piezoelectric property is far below patent of the present invention.It is to adopt BiFeO
3Reduce sintering temperature, need synthetic BiFeO
3, cost height and complex process.The additive that reduces sintering temperature is different from this patent.Prescription is formed and is different from this patent.The additive that reduces sintering temperature is different from this patent.
China's academic dissertation in 2005 (author: Lu Pengxian) " doping vario-property of PZT base piezoelectric ceramic and low-temperature sintering research " a kind of low-temperature melt piezoelectric ceramic is disclosed, its formula system is 0.2PZN-0.8PZT and 0.02PNW-0.07PMN-0.91PZT, optimum performance is: specific inductivity is 1952, d
33=312pC/N, Kp=0.498.Its piezoelectric property is far below patent of the present invention.It is to adopt BiFeO
3Reduce the sintering temperature, need synthetic BiFeO
3, cost height and complex process.Prescription is formed and is different from this patent.The additive that reduces sintering temperature is different from this patent.
China 2005 the 11 national Dielectric Physics, material and application academic meeting paper " five yuan is PMMSN piezoceramic material and low-temperature sintering thereof " a kind of low-temperature melt piezoelectric ceramic is disclosed, its formula system is Pb (Mg
1/3Nb
2/3) O
3-Pb (Mn
1/3Nb
2/3) O
3-Pb (Mn
1/3Sb
2/3) O
3-Pb (Zr, Ti) O
3, obtain the piezoelectric ceramics that 1100 ℃ of sintering have following performance: specific inductivity is 1349, d
33=326pC/N, Kp=0.56.Add SiO
2Can make sintering temperature be reduced to 850 ℃～950 ℃ with Cd, keep material property substantially.Its piezoelectric property is far below the piezoelectric property of this patent.Prescription is formed and is different from this patent.The additive that reduces sintering temperature is different from this patent.
Other have patent " doping manganese niobium lead acid-zirconium Titanium lead plumbate piezoceramic material and preparation technology thereof " (number of patent application: 200410016324.0), it is to be matrix with manganese niobium lead acid-zirconium Titanium lead plumbate piezoelectric ceramics, acquisition can in, low-temperature sintering.Its piezoelectric property is far below patent of the present invention.2～4 hours agglomerating piezoelectric ceramics performances of 1050 ℃ of insulations are: Kp=0.56, specific inductivity are 1300, and Qm is 1450.Prescription is formed and is different from this patent.Its piezoelectric property is far below the piezoelectric property of this patent.The additive that reduces sintering temperature is different from this patent.
(number of patent application: 86201450), it is to adopt to add boron-bismuth-telluride low smelting glass realize low-temperature sintering in the PZT base-material, and it is mainly used in the preparation monolithic piezoelectric ceramic transformer to also have patent " low-temperature sintering monolithic piezoelectric ceramic transformer ".What this patent was announced is monolithic piezoelectric ceramic transformer, does not relate to about material prescription and performance.Prescription is formed and is different from this patent.The additive that reduces sintering temperature is different from this patent.
Summary of the invention
The purpose of this invention is to provide the additive and the add-on thereof that reduce the piezoelectric ceramics sintering temperature.
The object of the present invention is achieved like this:
With niobium zinc-niobium nickel-Pb-based lanthanumdoped zirconate titanates (PZN-PNN-PZT) is the basic recipe system, and the additive and the add-on thereof that reduce the piezoelectric ceramics sintering temperature comprise (weight percent): the add-on of total reduction sintering temperature additive is: 4～12%, wherein: V
2O
50～10%, Li
2CO
30～10%, ZnO0～10%.
The sintering of piezoelectric ceramics of the present invention is to adopt following technology: the spacious burning, binder removal and sintering are disposable to be finished.
The present invention adopts the conventional lead piezoelectric ceramics preparation technology that contains, promptly adopt conventional piezoelectric ceramics chemical feedstocks, by prescription batching, ball milling mix, the oven dry back, sieve, synthetic, then ball milling, dry, sieve, add the tackiness agent granulation, cross 40 mesh sieves, be pressed into green sheet again, binder removal sintering in air obtains piezoelectric ceramics, top electrode, test performance.
The additive of above-mentioned reduction piezoelectric ceramics sintering temperature and add-on thereof preferably adopt following three kinds of schemes (weight percent):
(1) amount of total reduction sintering temperature additive is: 4～12%, wherein: V
2O
50～10%, Li
2CO
30～10%, ZnO0～10%.
(2) amount of total reduction sintering temperature additive is: 6～10%, wherein: V
2O
50～7%, Li
2CO
30～8%, ZnO0～8%.
(3) amount of total reduction sintering temperature additive is: 7～12%, wherein: V
2O
51～7%, Li
2CO
32～8%, ZnO3～8%.
The present invention compared with prior art has following advantage:
1, the piezoelectric ceramics of this patent acquisition is realized low-temperature sintering (sintering temperature is: 960～1000 ℃).The additive composition that reduces sintering temperature is simple, cost is low.The volatilization of low-temperature sintering energy inhibited oxidation lead, compliance with environmental protection requirements.
2, in the piezoelectric ceramics sintering process, adopt spacious the burning, binder removal and sintering are disposable to be finished, and simplifies technology, reduces cost.Adopt the interior electrode of Ag/Pd=90/10～95/5 (weight percent) alloy electrode, also can reduce cost greatly as multilayer piezoelectric device.
3, compare the piezoelectric property height of the low-temperature melt piezoelectric ceramic of this patent with other low sintering piezoelectric ceramics.
4, this patent adopts the preparation technology of conventional piezoelectric ceramics to be prepared.Preparation technology is simple, easy realization of industrialization.
Embodiment
The invention will be further described in conjunction with the embodiments now.
Table 1,2 provides 6 prescriptions of two groups of embodiment of the present invention.
With niobium zinc-niobium nickel-zirconium Titanium lead plumbate (PZN-PNN-PZT) is the basic recipe system, the main raw material of 6 prescriptions of two groups of embodiment adopts piezoelectric ceramics raw material commonly used, by the prescription batching, adopt the planetary ball mill ball milling to mix (also can adopt dry method vibratory milling) with dehydrated alcohol as medium in the material for preparing, material: ball: ethanol=1:3:(0.6～0.9), the ball milling time is 6～8 hours, oven dry obtains dry mash, sieve, pre-burning, adopt planetary ball mill ball mill pulverizing (also can adopt dry method vibratory milling), material: ball: water=1:3:(0.6～0.9), oven dry, sieve, in powder, add the concentration account for its weight 14～20% and be 5～10% polyvinyl alcohol solution, carry out rolling formation and punching, form the base sheet of certain size, carry out binder removal and sintering (the spacious burning) in 1 hour 960～1000 ℃ of insulations then, be incubated 15 minutes down at 780～870 ℃ again and carry out silver ink firing, form silver electrode.Polarize at following polarization condition: under the electric field action at 3～4kV/mm, the polarization temperature is 110～125 ℃, and the polarization time is 15～20 minutes.After finishing, polarization places test dielectric and piezoelectric property after 48 hours.The dielectric and the piezoelectric property of 6 prescriptions of two groups of embodiment sample are listed in table 3.
Table 1
Table 2
The performance of table 3 sample
| Specimen coding | Specific inductivity | Dielectric loss (* 10 -4) | Piezoelectric strain constant (d 33)/(×10 -12C/N) | Planar electromechanical coupling factor (Kp) |
| 1 | 3500 | 0.011 | 519 | 0.77 |
| 2 | 3200 | 0.014 | 508 | 0.75 |
| 3 | 3040 | 0.016 | 486 | 0.72 |
| 4 | 2875 | 0.0172 | 479 | 0.70 |
| 5 | 2678 | 0.0181 | 466 | 0.68 |
| 6 | 2623 | 0.0187 | 460 | 0.66 |
Claims (2)
1. additive that is used to reduce piezoelectric ceramics sintering temperature of electro-acoustic conversion device is characterized in that: additive is the basic recipe system: 7～12%, wherein: V
2O
51～7%, Li
2CO
32～8%, ZnO 3～8%.
2. the sintering process that uses the additive of the described reduction piezoelectric ceramics sintering temperature of electro-acoustic conversion device of claim 1 to prepare the PZN-PNN-PZT piezoelectric ceramics is: sintering temperature is 960～1000 ℃, the spacious burning, binder removal and sintering are disposable to be finished, and adopts the interior electrode of Ag/Pd=90/10～95/5 (weight percent) alloy electrode as multilayer piezoelectric device.
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|---|---|---|---|
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|---|---|---|---|
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| CN101386536B true CN101386536B (en) | 2011-11-16 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102531638B (en) * | 2012-01-05 | 2013-11-20 | 江苏大学 | Additive and application thereof for reducing sintering temperature of piezoceramic |
| JP6186625B2 (en) * | 2013-06-27 | 2017-08-30 | 日本特殊陶業株式会社 | Piezoelectric ceramic and piezoelectric element using the same |
| CN103467089A (en) * | 2013-09-09 | 2013-12-25 | 天津大学 | Zinc niobium and nickel niobium lead zirconate titanate piezoelectric ceramic |
| CN106220170A (en) * | 2016-07-18 | 2016-12-14 | 瑞声精密制造科技(常州)有限公司 | Piezoceramic material, piezoelectric ceramics sintered body and piezoelectric ceramic devices thereof |
| CN116813338A (en) * | 2023-07-06 | 2023-09-29 | 景德镇汉方精密电子有限公司 | Piezoelectric ceramic material and preparation method and application thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101244930A (en) * | 2008-03-17 | 2008-08-20 | 江苏裕成电子有限公司 | Low-temperature melt piezoelectric ceramic and preparation technique |
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|---|---|---|---|---|
| CN101244930A (en) * | 2008-03-17 | 2008-08-20 | 江苏裕成电子有限公司 | Low-temperature melt piezoelectric ceramic and preparation technique |
Non-Patent Citations (2)
| Title |
|---|
| S.Y.Cheng等.The properities of low-temperature fired piezoelectric ceramics.《Journal of Materials Science》.1986,第21卷 * |
| 曹林洪等.锂盐助烧铌镁酸铅-钛酸铅陶瓷的压电陶瓷.《硅酸盐学报》.2008,第36卷(第6期),第759页结论部分、第757页左栏. * |
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