CN102633496A - Method for preparing high-temperature and high-power piezoelectric transformers by using BLF-PTM (bismuth lanthanum ferrite-lead manganese titanate) piezoelectric ceramics - Google Patents

Method for preparing high-temperature and high-power piezoelectric transformers by using BLF-PTM (bismuth lanthanum ferrite-lead manganese titanate) piezoelectric ceramics Download PDF

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CN102633496A
CN102633496A CN2012100996028A CN201210099602A CN102633496A CN 102633496 A CN102633496 A CN 102633496A CN 2012100996028 A CN2012100996028 A CN 2012100996028A CN 201210099602 A CN201210099602 A CN 201210099602A CN 102633496 A CN102633496 A CN 102633496A
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electrode
high
piezoelectric
temperature
blf
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CN2012100996028A
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俞圣雯
冯磊洋
石贵阳
程晋荣
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上海大学
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Abstract

The invention relates to a method for designing and preparing high-temperature and high-power piezoelectric transformers, belonging to the technical field of designing and preparing inorganic non-metallic materials and electronic devices. The method disclosed by the invention is used for designing and preparing a high-power-density piezoelectric transformer which is prepared mainly by using BLF-PTM hardening piezoelectric ceramics and can be used at high temperature. The upper and lower surfaces of a wafer type piezoelectric ceramic are respectively coated with a high-temperature silver electrode, an upper electrode is made of a mask plate, the center of the upper electrode is a circle, a ring is arranged outside the circle, and a certain gap is formed between the circle and the ring. An external ring electrode is taken as an input electrode, and a central circle electrode is taken as an output electrode. A piezoelectric ceramic wafer with prepared electrodes is put into 120OC silicone oil and then polarized for 20 minutes in a 30kV/cm electric field, so that a unidirectional polarized wafer type high-temperature and high-power-density piezoelectric transformer is obtained. According to the invention, the power densities of the piezoelectric transformer at different temperatures are measured.

Description

用铁目$秘_钦1¾铅系压电陶瓷制备局温、局功率压电变压器的方法 Chin iron mesh _ secret 1¾ lead ceramics prepared Bureau temperature, the power of the piezoelectric transformer Bureau method $

技术领域 FIELD

[0001] 本发明涉及一种用铁酸铋-钛酸铅系压电陶瓷制备高温高功率密度压电变压器的方法。 [0001] The present invention relates to a bismuth iron - Method lead titanate ceramics prepared high temperature and high power density of the piezoelectric transformer. 属无机非金属材料和电子器件设计与制备技术领域。 An inorganic non-metallic material, design and preparation technical field and electronics.

背景技术 Background technique

[0002] 压电变压器是一种利用压电陶瓷的电-机-电耦合效应来实现变压的电子器件。 [0002] The piezoelectric transformer is electrically utilizing piezoelectric ceramic - machine - electrical coupling effect of the transformer to achieve an electronic device. 由于其转换效率高、抗干扰能力强、体积小、不易燃的特点被广泛的应用到液晶显示(LCD)、平板显示(LED)、空气净化、复印设备等电子设备的驱动电路中。 Due to its high conversion efficiency, anti-interference ability, small size, non-flammable characteristics has been widely applied to the liquid crystal display (LCD), flat panel display (the LED), an air cleaner, a driving circuit of the copying apparatus and the like in an electronic device. 现在应用比较广泛的是具有较高升压比的Rosen型压电变压器,但其功率密度一般小于2 W/cm3,不适合在大功率电路中应用。 Is now used widely in a Rosen type piezoelectric transformer has a high step-up ratio, but the power density is typically less than 2 W / cm3, not suitable for use in high power circuits. 而在电子设备不断向高功率化以及集成化方向发展的趋势下,圆片型和圆环型压电变压器由于具有较高的功率密度而受到关注。 And in the development of electronic devices continue to increase in power and direction of the trend of integration, wafer type and ring type piezoelectric transformer due to the high power density and attention.

[0003] 1973年Berlincourt等人首次研制出具有单一极化方向的圆片型压电变压器。 [0003] In 1973 Berlincourt, who first developed a wafer-type piezoelectric transformer with a single polarization direction. 随后,Laoratanakul等人用硬性PZT陶瓷制备出单向极化圆片型压电变压器,成功地驱动了压电马达,其功率密度为3. 5 W/cm3。2004年Priya和Uchino等人研制出圆片型单向极化的三层和单层压电变压器的功率密度分别为25和40 W/cm3,后者代表了目前压电变压器可以达到的最大功率密度。 Subsequently, Laoratanakul et al prepared a rigid unidirectional polarized PZT ceramics disc type piezoelectric transformer, the piezoelectric motor drive succeeded, the power density of 3. 5 W / cm3. In 2004 Priya developed and Uchino et al disc type three-way power density and polarization single piezoelectric transformer, respectively 25 and 40 W / cm3, which represents the maximum power density of the current of the piezoelectric transformer can be achieved. 提高压电变压器功率性能的关键是研制出具有优越的压电性能和机械性能的大功率压电材料。 Key to improve the power performance of the piezoelectric transformer is to develop high-power piezoelectric material having piezoelectric properties and excellent mechanical properties.

发明内容 SUMMARY

[0004] 本发明的目的是制备一种可以在高温下工作、具有高功率密度的压电变压器,SP利用BLF-PTM (铁酸铋镧-锰钛酸铅)硬性压电陶瓷制备高温、高功率压电变压器。 [0004] The object of the present invention is to prepare a work at a high temperature, high power density of the piezoelectric transformer, SP using BLF-PTM (bismuth lanthanum iron - manganese lead titanate) piezoelectric ceramics prepared rigid high temperature, high power piezoelectric transformer.

[0005] 一种用铁酸铋-钛酸铅系压电陶瓷制备高功率压电变压器的方法,其特征在于具有以下的过程: [0005] A bismuth iron - Preparation of a piezoelectric transformer of a high power lead titanate-based piezoelectric ceramics, which is characterized by the following process:

a. BLF-PTM压电陶瓷片的制备按现有已知技术方法制备:(1).按照0. 6 (Bia9La0.)FeO3-O. 4Pb (Tia99Mnatll) O3的化学计量比,即以五水硝酸铋、九水硝酸铁、六水硝酸镧、钛正四丁脂、醋酸铅和醋酸锰为原料,以乙二醇为溶剂搅拌10小时配置溶胶;然后把制得的溶胶在70 0C下烘干、研磨成粉,并在600 0C高温下煅烧2小时,得到BLF-PTM纳米粉;(2).纳米粉造粒,并在120 MPa压力下压成圆片;最后利用两步法进行烧结;先升温到1070 0C,然后降温到800 0C保温2小时,随后随炉降到室温,制得BLF-PTM陶瓷;(3).将BLF-PTM压电陶瓷片研磨、抛光,得到厚度为0. 55mm、直径为10 mm的陶瓷圆片; . A preparation BLF-PTM piezoelectric ceramics prepared according to the known prior art methods: (1) According to 0. 6 (Bia9La0.) FeO3-O 4Pb (Tia99Mnatll) O3 stoichiometric ratio, i.e. pentahydrate. bismuth nitrate, ferric nitrate nonahydrate, lanthanum nitrate hexahydrate, titanium n-tetrabutylammonium fat, lead acetate and manganese acetate as starting material, stirred for 10 hours configured sol glycol as a solvent; and then dried under sol prepared in 70 0C, pulverized and calcined for 2 hours at 600 0C temperature to afford BLF-PTM nanopowder; (2) nanopowder granulated and pressed into disks at 120 MPa pressure; finally sintered using a two-step process; first heated to 1070 0C, and then cooled to 800 0C for 2 hours, then the furnace to room temperature, to obtain a ceramic BLF-PTM;. (3) the piezoelectric ceramic sheet BLF-PTM grinding, polishing, a thickness of 0. 55mm , ceramic disc diameter of 10 mm;

b.覆盖银浆电极:在陶瓷圆片的上下表面涂高温银浆作为电极,下表面涂满电极,上表面采用掩膜板得到一个圆形电极和一个环形电极,圆形和圆环之间存在一定的间隙; b covering the silver electrode: high temperature silver paste is coated on upper and lower surfaces of the ceramic disc as an electrode, the lower electrode painted surface, the upper surface of the mask plate obtained using a circular electrode and a ring electrode, and the circular ring between the there is a certain gap;

c.加热处理:将涂好电极的陶瓷圆片放进马弗炉,在500 °C保温15分钟,然后升温到800 0C保温10分钟,最后随炉降至室温; . C heating treatment: good coated electrode into the ceramic disc muffle furnace, 500 ° C and for 15 minutes, then heated to 800 0C for 10 minutes, and finally cooled to room temperature with the furnace;

d.电场下极化:把制备好电极的陶瓷片放在120 °(:硅油里面,沿厚度方向,在30 kV/cm的电场下极化30 min ;极化后的陶瓷圆片就是一个单向极化的圆片型压电变压器;圆环形的上电极为输入电极,圆形上电极为输出电极。 . D the electric field polarization of: preparing ceramic sheets in a good electrode 120 ° (: silicone oil which, in the thickness direction, the electric field 30 kV / cm of polarization of 30 min; a polarized ceramic wafer is a single the disc-type polarized piezoelectric transformer; annular electrode is an input electrode, an output electrode of the circular electrode.

[0006] 本发明的优点和特点: [0006] The advantages and features of the present invention:

(1).本发明主要是利用Mn、La掺杂铁酸铋-钛酸铅(BLF-PTM)压电陶瓷设计与制备一种能在高温下使用的具有高功率密度的压电变压器,其特征在于: (2).本发明利用一种新的BLF-PTM硬性压电材料制备具有高功率密度的单向极化圆片型压电变压器。 . (1) of the present invention is the use of Mn, La-doped bismuth ferrite - a piezoelectric transformer having a high power density of lead titanate (BLF-PTM) design and prepare a piezoelectric ceramic can be used at high temperatures, which characterized in that: (2) preparing a new hard piezoelectric material BLF-PTM using the present invention, one kind of disc-type having a unidirectional polarized piezoelectric transformer high power density.

[0007] (3).本发明中的高功率压电变压器具有单一极化方向,底电极及其相反面上的输入和输出端的电极作为耐高温电极。 [0007] (3). In the present invention, a high power piezoelectric transformer having a single polarization direction, the bottom electrode and the input and output electrodes of the opposite side as the temperature of the electrode.

[0008] (4).本发明中的雅典变压器可以在较高的温度下工作,并且在室温至300 °(:温度区间工作时,具有较大的功率密度。 . [0008] (4) in the present invention may be Athens transformer operate at higher temperatures, and at room temperature to 300 ° (: working temperature range, has a large power density.

附图说明 BRIEF DESCRIPTION

[0009] 图I本发明中的压电变压器平面图以及上电极的形状和尺寸。 [0009] FIG plan view of the piezoelectric transformer, and I shape and size of the upper electrode in the present invention.

[0010] 图2本发明中的压电变压器的截面图以及极化方向。 [0010] FIG. 2 is a sectional view of the present invention and the direction of polarization of the piezoelectric transformer.

[0011] 图3本发明中的压电变压器输入与输出电路示意图。 [0011] The input and output circuit of the piezoelectric transformer in FIG. 3 a schematic view of the present invention.

[0012] 图4本发明中的压电变压器的性能测试系统示意图。 [0012] In the piezoelectric transformer of the present invention Figure 4 a schematic diagram of the system performance test.

[0013] 图5本发明中的压电变压器在室温下匹配负载时不同输入电压下的功率密度以及升温。 [0013] FIG. 5 in the present invention the power density of the piezoelectric transformer to match different input voltages and load warmed at room temperature.

[0014] 图6本发明中的压电变压器在不同温度匹配负载时不同输入电压下的功率密度。 [0014] FIG. 6 in the piezoelectric transformer of the present invention under different power densities of the input voltage to match the load at different temperatures. 具体实施方式 Detailed ways

[0015] 现将本发明的具体实施例叙述于后。 [0015] The embodiment will now be described in the particular embodiment of the present invention.

实施例 Example

[0016] 本实施例中BLF-PTM压电陶瓷制备高功率压电变压器的步骤如下: Step [0016] Preparation Example BLF-PTM high-power piezoelectric ceramic piezoelectric transformer of this embodiment is as follows:

I.以五水硝酸铋、九水硝酸铁、六水硝酸镧、钛正四丁脂、醋酸铅和醋酸锰为原料,以乙二醇为溶剂,按照0. S(Bia9Laai)FeO3-O. 4Pb (Tia99Mnatll)O3化学计量比的组分,把原料溶于乙二醇中搅拌10小时;然后把制得的溶胶在70 °C下烘干。 I. In bismuth nitrate pentahydrate, iron nitrate nonahydrate, lanthanum nitrate hexahydrate, titanium n-tetrabutylammonium fat, lead acetate and manganese acetate as starting material, ethylene glycol as a solvent, in accordance 0. S (Bia9Laai) FeO3-O. 4Pb ( Tia99Mnatll) O3 component stoichiometric ratio, the material was dissolved in ethylene glycol was stirred for 10 hours; then drying the obtained sol at 70 ° C. 烘干后的溶胶研磨成粉并在6000C下煅烧2小时,得到BLF-PTM纳米粉。 Sol after drying and pulverizing calcined for 2 hours at 6000C, to give BLF-PTM nano powder.

[0017] 2.纳米粉造粒,并在120 MPa压力下压成直径为120mm的圆片;最后利用两步法进行烧结,先升温到1070 °C然后降温到800 °C度保温2小时,随后温度随炉降到室温制备出BLF-PTM陶瓷。 [0017] 2. nanopowder granulated, and pressed at a pressure of 120 MPa into a disk having a diameter of 120mm; the last two-step sintering method, first heated to 1070 ° C and then cooled to 800 ° C degrees for 2 hours, then the furnace temperature was decreased to room ceramics prepared BLF-PTM.

[0018] 3.将BLF-PTM压电陶瓷片研磨、抛光,得到厚度为0. 55 mm,直径为10 mm的陶瓷圆片。 [0018] 3. The piezoelectric ceramic sheet BLF-PTM grinding, polishing, a thickness of 0. 55 mm, a diameter of 10 mm ceramic disc.

[0019] 4.在陶瓷圆片的上下表面涂高温银浆作为电极,下表面涂满电极,上表面采用掩膜板得到一个圆形电极和一个环形电极,圆形和圆环之间存在一定的间隙,具体形状和尺寸如图I所示,其中I为圆形电极部分,2为环形电极部分。 [0019] 4. The upper and lower surfaces of the ceramic-coated wafer temperature silver paste as an electrode, the lower electrode painted surface, the upper surface of the mask plate obtained using a circular exists between the electrode and a ring electrode, and the circular ring certain gap, the specific shape and dimensions shown in FIG. I, where I is the circular electrode portion, the electrode portion 2 is annular. 将涂好电极的陶瓷圆片放进马弗炉,在500 °C保温15分钟,然后升温到800 0C保温10分钟,最后随炉降至室温。 Good electrode coated ceramic disc into the muffle furnace, 500 ° C and for 15 minutes, then heated to 800 0C for 10 minutes, and finally cooled to room temperature in the furnace. [0020] 5.把制备好电极的陶瓷园片放在120 °(:硅油里面,沿厚度方向,在30 kV/cm的电场下极化30 min,极化方向如图2所示。极化后的陶瓷圆片就是一个单向极化的圆片型压电变压器。 [0020] 5. The ceramic disc was prepared in good electrode 120 ° (: silicone oil which, in the thickness direction, the electric field 30 kV / cm of polarization 30 min, the polarization directions of polarization as shown in FIG. after the ceramic disc is a disc-type unidirectional polarized piezoelectric transformer.

[0021] 6.本发明压电变压器的平面图及其截面图如图I和图2所示。 [0021] 6. The piezoelectric transformer according to the present invention, a plan view and a sectional view of FIG. I and 2. 本发明中的压电变压器的输入与输出电路如图3所示,圆环形的上电极2为输入电极,圆形上电极I为输出电极。 In the present invention, the piezoelectric transformer input and output circuits shown in Figure 3, the upper electrode 2 to the input of the annular electrode, the circular electrode I is output electrodes.

[0022] 性能测试 [0022] Performance Test

本发明中所得高温大功率压电变压器的性能测试 The resulting high temperature of the present invention, the piezoelectric transformer power performance testing

图4为本发明中压电变压器的性能测试示意图。 FIG 4 is a schematic view of the invention in the performance test of the piezoelectric transformer. 信号发生器产生的交流信号通过功率放大器放大后作为输入信号施加到变压器的输入端,由压电变压器输出端输出的交流信号作用到负载电阻上,采用示波器探测输入和输出信号的波形以及大小。 AC signal generator is applied by the power amplifier amplifies an input signal to the input of the transformer, the contribution to the output signal from the output terminal of the piezoelectric transformer to the load resistor, and the size of the oscilloscope to detect a waveform input and output signals. 本发明中的压电变压器工作时的表面温度由非接触式红外温度探测仪来测量。 When the surface temperature of the piezoelectric transformer of the present invention is operative to measure the temperature of a non-contact type infrared detector. 测量变压器的高温性能时,把压电变压器放在高温炉内,变压器的输入输出端用耐高温导线连接。 When measuring high temperature performance of the transformer, the piezoelectric transformer on the high-temperature furnace, the input and output terminals of the transformer with a high temperature wire connection.

[0023] I)室温下的功率性能及升温 [0023] I) power performance and warmed at room temperature

图5为本发明中的压电变压器在室温下匹配负载时不同输入电压下的功率密度以及升温。 Figure 5 of the present invention the power density of the piezoelectric transformer to match different input voltages and load warmed at room temperature. 随着输入电压的不断增加,压电变压器在匹配负载下的功率密度不断增加,当功率密度大于10 W/cm3出现明显的升温现象。 With increasing input voltage, the power density of the piezoelectric transformer in a matched load continues to increase, when the power density is greater than 10 W / cm3 apparent warming phenomenon. 当压电变压器升温20 °(:时,其功率密度为30 W/cm3。相同升温情况下,PZT大功率陶瓷制备的圆片型大功率压电变压器的最大功率密度一般为20 W/cm3。 When the temperature rise of the piezoelectric transformer 20 ° (: when the power density of 30 W / cm3 at the same temperature rise, the maximum power density of disc type power transformer for preparing a PZT piezoelectric ceramic power is generally 20 W / cm3..

[0024] 2 )高温下的功率性能 [0024] 2) power performance at a high temperature

图6为本发明中的压电变压器在不同温度匹配负载时不同输入电压下的功率密度。 FIG 6 is different from the piezoelectric transformer of the present invention in power density at temperatures at different voltages matched load. 在不同的温度下,匹配负载下的功率密度均随着输入电压的增加而增加。 At different temperatures, the power density with the increase of the load match the input voltage increases. 在200 °C以下,压电变压器的功率密度达到27 W/cm3。 At below 200 ° C, the power density of the piezoelectric transformer reaches 27 W / cm3. 当温度高于200 °C时,压电变压器的最大功率密度随着温度的升高而减少较快,其在250 °C时的功率密度可达到20 ff/cm3,300 °C时的功率密度降为14 W/cm3。 When the temperature is higher than the power density of 200 ° C, the maximum power density of the piezoelectric transformer is reduced as the temperature rises rapidly, the power density to 250 ° C at up to 20 ff / cm3,300 ° C when reduced to 14 W / cm3. 当压电变压器的工作温度为350 °C时,压电变压器的性能大幅下降,功率密度小于5 W/cm3。 When the piezoelectric transformer operating temperature of 350 ° C, a substantial decline in performance of the piezoelectric transformer, the power density is less than 5 W / cm3. 本发明的压电变压器在300 0C以下工作时均具有较高的功率密度。 The piezoelectric transformer according to the present invention, when the work 300 0C have high power density. ,

Claims (1)

1. 一种用铁酸铋-钛酸铅系压电陶瓷制备高功率压电变压器的方法,其特征在于具有以下的过程和步骤: a. BLF-PTM压电陶瓷片的制备按现有已知技术方法制备:(I).以五水硝酸铋、九水硝酸铁、六水硝酸镧、钛正四丁脂、醋酸铅和醋酸锰为原料,以乙二醇为溶剂,按照O. 6 (Bi0.^1) FeO3-O. 4Pb (Tia99Mnatll) O3化学计量比的组分,把原料溶于乙二醇中搅拌10小时;然后把制得的溶胶在70 °(:下烘干;烘干后的溶胶研磨成粉并在600 °C下煅烧2小时,得到BLF-PTM纳米粉;(2).纳米粉造粒,并在120 MPa压力下压成直径为120mm的圆片;最后利用两步法进行烧结,先升温到1070 °C然后降温到800 °C度保温2小时,随后温度随炉降到室温制备出BLF-PTM陶瓷;(3).将BLF-PTM压电陶瓷片研磨、抛光,得到厚度为O. 55 mm,直径为10 mm的陶瓷圆片; b.覆盖银浆电极:在陶瓷圆片的上下表面涂高温银 A bismuth iron - Preparation of a piezoelectric transformer of a high power lead titanate-based piezoelectric ceramics, which is characterized by the following procedures and steps: a preparing BLF-PTM piezoelectric ceramic sheets existing press. preparation methods known techniques:. (I) to bismuth nitrate pentahydrate, iron nitrate nonahydrate, lanthanum nitrate hexahydrate, titanium n-tetrabutylammonium fat, lead acetate and manganese acetate as starting material, ethylene glycol as a solvent, according to O. 6 (Bi0 after drying; drying under:..; ^ 1) FeO3-O 4Pb (Tia99Mnatll) O3 component stoichiometric ratio, the raw material glycol stirred for 10 hours and then dissolved in the sol prepared in 70 ° ( sol pulverized and calcined for 2 hours at 600 ° C, to give BLF-PTM nano powder;. (2) nanopowder granulated, and compressed into a wafer having a diameter of 120mm at a pressure of 120 MPa; Finally a two-step for sintering method, first heated to 1070 ° C and then cooled to 800 ° C degrees for 2 hours, then the furnace temperature down to room temperature to prepare a ceramic BLF-PTM; (3) the piezoelectric ceramic sheet BLF-PTM grinding, polishing. , a thickness of O. 55 mm, a diameter of the ceramic disc of 10 mm; B covering the silver electrode: silver coated high temperature upper and lower surfaces of the ceramic disc 浆作为电极,下表面涂满电极,上表面采用掩膜板得到一个圆形电极和一个环形电极,圆形和圆环之间存在一定的间隙; c.加热处理:将涂好电极的陶瓷圆片放进马弗炉,在500 °C保温15分钟,然后升温到800 0C保温10分钟,最后随炉降至室温; d.电场下极化:把制备好电极的陶瓷片放在120 °(:硅油里面,沿厚度方向,在30 kV/cm的电场下极化30 min; 极化后的陶瓷圆片就是一个单向极化的圆片型压电变压器;圆环形的上电极为输入电极,圆形上电极为输出电极。 Good ceramic disk coated electrode: c heat treatment; pulp as an electrode, the lower electrode painted surface, the upper surface of the mask plate obtained using certain gap between a circular electrode and a ring electrode, and the circular ring. pieces into the muffle furnace, 500 ° C and for 15 minutes, then heated to 800 0C for 10 minutes, and finally cooled to room temperature with the furnace; the electric field polarization D: preparation of the ceramic sheets on the good electrode 120 ° ( : silicone oil which, in the thickness direction, the electric field 30 kV / cm of polarization of 30 min; a polarized ceramic wafer is a wafer unidirectional polarized piezoelectric transformer; annular electrode on the input electrode, the output electrode of the circular electrode.
CN2012100996028A 2012-04-09 2012-04-09 Method for preparing high-temperature and high-power piezoelectric transformers by using BLF-PTM (bismuth lanthanum ferrite-lead manganese titanate) piezoelectric ceramics CN102633496A (en)

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