• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A method for producing piezoelectric ceramics of a Pb(Sn alpha Sb1- alpha )O3-PbTiO3 system is disclosed which comprises providing a piezoelectric ceramic composition expressed by the general formula: xPb(Sn alpha Sb1- alpha )O3-PbTiO3 wherein subscripts alpha , x and y are mole fractions of the respective components and have the following values, x+y=1.00, 1/4</= alpha </=3/4, 0.01</=x</=0.40, and 0.60</=y</=0.99, forming powder of the composition into forming bodies, and firing the forming bodies in an oxygen atmosphere containing not less than 80 vol % of oxygen. The firing in the oxygen atmosphere is effected at a temperature not less than 1000 DEG C. A part of lead in the composition may be replaced with not more than 20 atomic percent of at least one metal selected from the group consisting of Ba, Ca, Sr and Cd. The composition may contain a small amount of Mn, Mg and/or Cr. Fine dense ceramics with low porosity, small average size and fine grain size are produced which can be applied to various electronic parts.
    公开号:SU1074401A3
    申请号:SU792806450
    申请日:1979-08-16
    公开日:1984-02-15
    发明作者:Огава Тосио
    申请人:Мурата Мануфакчуринг Компани (Фирма)；
    IPC主号:
    专利说明:

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    four;:
    4 This invention relates to piezotechnique and can be used for the manufacture of ceramics based on Pb solid solutions (-PPIOZ. Piezoelectric ceramics based on lead titanate-zirconate is widely used to make piezoelectric transducers, frequency selective devices, piezoelectric ignition elements. One of the important technological operations affecting the performance of ceramics is firing, which is carried out in air in an atmosphere of lead oxide ClJ. Thus, ceramics has a relatively high porosity and a large average pore size in the range of 5–15 µm, which makes it impossible to use it in a number of devices, in particular, when one of the electrode sizes is close to 15 µm or less. reduces mechanical strength. ceramics - and some other characteristics. A method is known to reduce the porosity of piezoelectric (electrical ceramics from lead-lactane zirconate-tytanate by firing in oxygen atmosphere 2. .. Although such a process makes it possible to obtain ceramics with low porosity, it has a serious drawback, which is that very large pores are embedded in the sintered ceramics due to the combination of small pores. The closest to the present invention is a method of obtaining a material having a composition (5 ((where, 0.014: X 40.2 s. The material is obtained by molding the blanks from an initial powder of a mixture of lead / tin compounds, calcined at 600–900 ° C, titanium followed by their sintering in an air atmosphere at 1000-1350 ° C. 3. The main disadvantage of this method is the relatively high porosity value and low Q value. The aim of the invention is to increase the mechanical strength. This goal is achieved by the fact that making piezoelectric ceramic material containing XRb (5P (,) o, and in RbP Oz, where 1/4 ot 3/4, 0, 0.40 and p, 0.99, by mixing the initial compounds of lead, tin, antimony, titanium, their roasting at B00-900C, grinding / molding the blanks and sintering at 1000-1350 ° C, additionally 0.0.5-5 May% of at least one compound from the group M, MpO, is added to the mixture, and sintering is carried out in an oxygen atmosphere with an O content of at least 80% by volume. In addition, at least one compound of calcium, barium, strontium, cadmium can be additionally added to the mixture on the basis of substitution of up to 20 at.% Of lead in the final product. Sample making wire T | in the following way. Raw materials (oxides, carbonates, hydroxides, oxalates, etc., are mixed with a wet method in a ball mill for at least 10 hours; after drying, this mixture is calcined for several hours at BEOO-EOO C. Speck is crushed, granulated and pressed into blanks when pressure 700-1000 kg / cm. Sintering is carried out in an oxygen atmosphere (/ 80 o6.% j with a maximum temperature lying in the range of 1100-1350 ° C.) During firing, an intermediate phase with a pyrochlore type structure is first formed .. O.jj , which is present on the grain boundaries up to 1200 ° C. This phase is about provides oxygen migration and contributes to the formation of low-porous ceramics; at the final stage of sintering, this phase is transformed into a Pb phase (5p ,, with a perovskite-type structure. In order to obtain ceramics with very low porosity and grain size. Not more than 10 µm, it is preferable to use fine-grained materials with an average grain size of not more than 4 microns, and sintering is carried out at 1000-1200 s. If you use an atmosphere with a content of not -95% by volume oxygen, you get ceramics with a small number of pores and high mechanical strength w, an atmosphere with a high oxygen content can be created just before the formation of closed cells (with;.., when the content of Pb (5n Sb, Qi) Oz more than 40 mol% and the sintered ceramics bad communication electromechanical coefficient Cr not previiaet 5%. If the value of ° C is outside the range of 1 / 4-3 / 4, then sintering is difficult because other compounds are formed .... The addition of MpO2 improves the value of Kr. Additive M retards grain growth and contributes to improving the temperature stability of the resonant frequency. The addition of SG2Oe contributes to the improvement of the characteristics of thermal aging. When the content of additives is more than (5 wt.%, Difficulties arise in the sintering of ceramics and its polarization. The chemical composition of the fabricated samples and the oxygen concentration V during calcination are given in Table 1.
    Table 2 shows the values of di-, at ZS). Thickness Measurements
    the electric permeability of the EH3 / ED, de-oscillations are carried out on Curie's thin diffusers, and electron coefficients 300 microns thick.
    connection between Kp and K. and mechanical-: and -tK | conducted after vyderzhki in the current Q-factor and ftmt. Formation of 1 h at 150 ° C, and K - after
    These are polished by a field of 3.0–4.0 kV / mm by second such grinding.
    Table 1
    权利要求:
    Claims (2)
    [1]
    ί χ έ 0.040 and $ 0.60> ί 0.99, by mixing the starting compounds of lead, tin, antimony, titanium, firing them at 600-900 ° C, grinding, forming blanks and sintering at 10001350 ° C, characterized in that, in order to increase mechanical strength, 0.05-5 wt.% of at least one compound from the группы-Ο, MnO 2 , Cr 2 ° 3 'group is additionally introduced into the charge, and sintering is carried out in an oxygen atmosphere at a content of 0 2 not less than 80 vol.%.
    [2]
    2. The method according to claim 1, with the fact that at least one compound of calcium, barium, strontium, cadmium is additionally introduced into the charge, taking into account substitution up to 20 at.% Lead in final product ..
    类似技术:
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    同族专利:
    公开号 | 公开日
    NL186888C|1991-03-18|
    DE2932918A1|1980-02-28|
    DE2932918C2|1988-12-15|
    US4230589A|1980-10-28|
    JPS5527673A|1980-02-27|
    JPS6022835B2|1985-06-04|
    NL186888B|1990-10-16|
    NL7906249A|1980-02-19|
    引用文献:
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    US3856693A|1972-12-18|1974-12-24|Bell Telephone Labor Inc|Method for producing lead zirconate titanate polycrystalline ceramics|
    JPS5432516B2|1973-09-04|1979-10-15|
    GB1456616A|1973-12-12|1976-11-24|Murata Manufacturing Co|Ferroelectric ceramic composition|
    JPS5436757B2|1974-10-09|1979-11-10|
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    DE3430186A1|1984-08-16|1986-02-27|Siemens AG, 1000 Berlin und 8000 München|METHOD FOR PRODUCING A POROUS PIEZOELECTRIC MATERIAL AND MATERIAL PRODUCED BY THIS METHOD|
    JPH0517188B2|1985-04-11|1993-03-08|Murata Manufacturing Co|
    US4990324A|1986-12-17|1991-02-05|Nippondenso Co., Ltd.|Method for producing two-component or three-component lead zirconate-titanate|
    US4832893A|1986-12-17|1989-05-23|Nippondenso Co., Ltd.|Method for producing a PLZT compound|
    DE59003114D1|1989-05-02|1993-11-25|Lonza Ag|Sinterable zirconium oxide powder and process for its production.|
    US5308807A|1992-07-15|1994-05-03|Nalco Chemical Company|Production of lead zirconate titanates using zirconia sol as a reactant|
    EP0663700B1|1993-12-27|1997-09-17|TDK Corporation|Piezoelectric ceramic composition|
    JP4488155B2|1999-10-20|2010-06-23|シェルエルノイエルバーレエネルギーエンゲゼルシャフトミットベシュレンクテルハフツング|Apparatus and method for heat treating at least one workpiece|
    EP1277238B1|1999-10-20|2010-09-15|Saint-Gobain Glass France S.A.|Device and method for simultaneous tempering of several process goods|
    JP3982267B2|2002-01-16|2007-09-26|株式会社村田製作所|Manufacturing method of multilayer piezoelectric ceramic element|
    JP6780479B2|2016-12-09|2020-11-04|トヨタ自動車株式会社|Method for producing sulfide solid electrolyte|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    JP53101213A|JPS6022835B2|1978-08-17|1978-08-17|
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