EP2548237A1 - Matériau piézo-céramique sans plomb à phase pérovskite et à phase bronze au tungstène, et procédé de production d'un composant piézo-céramique doté de ce matériau - Google Patents

Matériau piézo-céramique sans plomb à phase pérovskite et à phase bronze au tungstène, et procédé de production d'un composant piézo-céramique doté de ce matériau

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Publication number
EP2548237A1
EP2548237A1 EP11725704A EP11725704A EP2548237A1 EP 2548237 A1 EP2548237 A1 EP 2548237A1 EP 11725704 A EP11725704 A EP 11725704A EP 11725704 A EP11725704 A EP 11725704A EP 2548237 A1 EP2548237 A1 EP 2548237A1
Authority
EP
European Patent Office
Prior art keywords
piezoceramic
phase
component
tungsten bronze
composition
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP11725704A
Other languages
German (de)
English (en)
Inventor
Robert Bathelt
Katrin Benkert
Carsten Schuh
Thomas Soller
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP2548237A1 publication Critical patent/EP2548237A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/495—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on vanadium, niobium, tantalum, molybdenum or tungsten oxides or solid solutions thereof with other oxides, e.g. vanadates, niobates, tantalates, molybdates or tungstates
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N30/00—Piezoelectric or electrostrictive devices
    • H10N30/01—Manufacture or treatment
    • H10N30/05—Manufacture of multilayered piezoelectric or electrostrictive devices, or parts thereof, e.g. by stacking piezoelectric bodies and electrodes
    • H10N30/053—Manufacture of multilayered piezoelectric or electrostrictive devices, or parts thereof, e.g. by stacking piezoelectric bodies and electrodes by integrally sintering piezoelectric or electrostrictive bodies and electrodes
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N30/00—Piezoelectric or electrostrictive devices
    • H10N30/01—Manufacture or treatment
    • H10N30/09—Forming piezoelectric or electrostrictive materials
    • H10N30/093—Forming inorganic materials
    • H10N30/097—Forming inorganic materials by sintering
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N30/00—Piezoelectric or electrostrictive devices
    • H10N30/80—Constructional details
    • H10N30/85—Piezoelectric or electrostrictive active materials
    • H10N30/853—Ceramic compositions
    • H10N30/8542—Alkali metal based oxides, e.g. lithium, sodium or potassium niobates
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3201—Alkali metal oxides or oxide-forming salts thereof
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3201—Alkali metal oxides or oxide-forming salts thereof
    • C04B2235/3203—Lithium oxide or oxide-forming salts thereof
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3224—Rare earth oxide or oxide forming salts thereof, e.g. scandium oxide
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3231—Refractory metal oxides, their mixed metal oxides, or oxide-forming salts thereof
    • C04B2235/3251—Niobium oxides, niobates, tantalum oxides, tantalates, or oxide-forming salts thereof
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3293—Tin oxides, stannates or oxide forming salts thereof, e.g. indium tin oxide [ITO]
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
    • C04B2235/74—Physical characteristics
    • C04B2235/76—Crystal structural characteristics, e.g. symmetry
    • C04B2235/768—Perovskite structure ABO3

Definitions

  • the invention relates to a lead-free, multi-phase piezoceramic material having at least one perovskite phase and at least one tungsten bronze phase and a method for producing a piezoceramic component with the material.
  • Piezo ceramic materials on the basis of the binary mixing ⁇ system of lead zirconate and lead titanate, known as lead-zirconate-titanate ceramic (Pb (Ti, Zr) O3, PZT) are, because of their excellent mechanical and piezoelectric properties, for example high Curie Temperature T c of over 300 ° C or high d33 ⁇ coefficient in the large and small signal range, used in many fields of technology.
  • Piezoelectric components with these materials include bending ⁇ converters , multilayer actuators and ultrasonic transducers. These components are used in actuators, medical technology, ultrasound technology or automotive engineering.
  • the material consists of a perovskite phase based on a potassium Sodium niobate (KNN).
  • KNN potassium Sodium niobate
  • a plurality of dopants may be present. Particularly good piezoelectric properties are obtained with lithium, tantalum and / or antimony as dopants.
  • the object of the invention is to further develop the known piezoceramic material for use in piezoceramic components.
  • a lead-free, multiphase piezoceramic material comprising at least one perovskite phase having the perovskite phase composition (Li x K ! X y Na y ) (Nbi- - u Ta Sb u ) O 3 and at least one tungsten bronze phase having the tungsten bronze phase composition (M I_
  • a method for producing a piezoceramic component with the piezoceramic material is also specified with the following method steps: a) providing a green body with a piezoceramic starting composition of the piezoceramic material and b) heat treating the green body, wherein the piezoceramic starting composition of the piezoceramic Material of the component is created.
  • the piezoceramic material is lead-free. Lead-free means that very small, detectable impurities can be present on lead, for example in the ppm range.
  • the piezoceramic material has a lead-free, at least two-phase system which has a perovskite phase based on an alkali metal niobate and a tungsten bronze phase based on an alkali metal niobate and / or on the basis of an alkali tantalate.
  • the alkali niobate of the perovskite phase is doped with tantalum and / or with antimony. Is preferably ⁇ least one of these metals are present (u + t + 0).
  • the tungsten bronze phase in addition to the pure alkali niobates or alkali tantalates, in particular mixed forms of these two oxidic alkali compounds are conceivable.
  • the mixed form contains both niobium and tantalum (alkali niobate tantalate).
  • the tungsten bronze phase on the A sites is doped with trivalent (trivalent) metal M 111 . Any trivalent metals are suitable. Different metals can also be used in the same piezoceramic material.
  • the perovskite phase is doped on the A sites with different metals.
  • the composition is a multi-phase system that has a high elongation (eg, high d33 coefficient) and a high Curie temperature ( Tc ). It has ⁇ ge shows that the piezoceramic material then has very good pie ⁇ zoelektwitz properties when, as it is not from the state of the art, single-phase (phase-in), but two or more phases. At least one tungsten bronze phase is present in addition to at least one perovskite phase. In addition, other (fixed) phases may be present. Also, the particular composition of the perovskite phase and the tungsten bronze phase has a great influence on the piezoelectric properties of the material.
  • a high elongation eg, high d33 coefficient
  • Tc Curie temperature
  • the two phases of the piezoceramic material are in the vicinity of a phase transformation from the ortho rhombic crystal system to the tetragonal crystal system.
  • a phase transformation from the ortho rhombic crystal system to the tetragonal crystal system.
  • very good piezoelectric properties of a material result.
  • the necessary for the actuators high strains can be achieved.
  • the trivalent metal M 111 is a rare earth metal RE.
  • the rare earth element RE is neodymium
  • B-site dopants may be present.
  • B-site dopants are, for example, Ti, Zr, Si, Ge, Y or Sc.
  • the B-sites of the perovskite phase and / or the B-sites of the tungsten bronze phase are partly occupied by one type of metal or by different types of metals.
  • the proportions of the two phases on the piezoceramic material can be very different.
  • a proportion of the tungsten bronze phase on the piezoceramic material is in the range of from 0.01% by volume to 25% by volume inclusive, and in particular from the range of 0 inclusive , Is selected from 05% by volume up to and including 15% by volume.
  • the proportion of the tungsten bronze phase is selected up to and including 10% by volume.
  • the proportions refer to the solid of the material.
  • the value of the perovskite phase on the piezoceramic material is in the range of 99.99 inclusive Vol .-% up to and including 75.0 vol .-% and in particular a value in the range of 99.95 vol .-% inclusive up to and including 85 vol .-% and 90 vol .-%.
  • the green body is a shaped body which, for example, consists of homogeneously mixed, pressed-together oxides of the stated metals.
  • the green body may have an organic additive, which is processed with the oxides of the metals to a slurry.
  • the organic additive is, for example, a binder or a dispersant.
  • a green body is produced in a molding process.
  • the green body is ⁇ example, a green sheet, which is produced by the forming process (film drawing).
  • the green body with the piezoceramic starting composition produced in the shaping process is subjected to a heat treatment.
  • the heat treatment of the green body includes calcination and / or sintering. It comes to the formation and compression of the forming piezoceramic material.
  • a mixing of pulverulent, oxidic metal compounds of the metals of the perovskite phase and the tungsten bronze phase is carried out according to a particular embodiment.
  • oxides of Me ⁇ metals for example antimony oxide (Sb 2 0 5) may, niobium oxide (B 2 0 5) and tantalum oxide (a 2 0 5), and precursors of the oxides of the metals, for example, carbonates (Li 2 C0 3, K 2 C0 3 ) or oxalates are ⁇ set.
  • precursors of the oxides of the metals for example, carbonates (Li 2 C0 3, K 2 C0 3 ) or oxalates are ⁇ set.
  • Both types of metal compounds, ie the precursors of the oxides and the oxides themselves, can be referred to as oxidi ⁇ cal metal compounds.
  • the powders of the oxidic metal compounds can be prepared by known processes, for example by the sol-gel, citrate, hydrothermal or oxalate process.
  • oxidic metal compounds can be produced with only one kind of metal. It is also conceivable, in particular, that oxidic metal compounds with more types of Metals are used (mixed oxides). Therefore, according to a Customized ⁇ ren embodiment, a piezoceramic out put ⁇ composition is used with at least one metal oxide compound with at least two of the metals. Examples of these are lithium niobate (LiNbOs) or lithium tantalate (Li-TaOs).
  • the oxide metal compound having at least two of the metals may also be the perovskite phase or the tungsten bronze phase itself.
  • To provide these mixed oxides can also be resorted to the above-mentioned precipitation reactions.
  • Also conceivable is a mixed-oxide process. In this case, powdery oxides of the metals are mixed together and calcined at higher temperatures. Calcination results in mixed oxides.
  • the workup of the metal oxides with the conversion into the piezoceramic material can be done in various ways. It is conceivable, for example, that first the powders of the oxidic metal compounds are homogeneously mixed.
  • the piezoceramic starting composition is formed in the form of a homogeneous mixture of the metal oxides. Subsequently, the piezoceramic starting composition is treated by heat ⁇ treat, for example, by calcination, in the piezoceramic material.
  • the piezoceramic material is ground to a fine piezoceramic powder.
  • a ceramic green body with an organic binder and further organic additives is produced from the fine piezoceramic powder in the shaping process. This ceramic green body is debinded and sintered. In this case, the pie ⁇ zokeramische component forms with the piezoceramic material.
  • the powders of the oxidic metal compounds can be homogeneously mixed and processed in the shaping process into a ceramic green body with organic binder.
  • This green body also has the piezoceramic starting composition. Subsequent sintering leads to the piezoceramic component with the piezoceramic material.
  • a piezoceramic component having at least one piezoelectric element is produced which has an electrode layer with electrode material, at least one further electrode layer with a further electrode material and at least one piezoceramic layer arranged between the electrode layers with the piezoceramic material.
  • a single piezoelectric element represents the smallest unit of the piezoceramic component.
  • a ceramic green sheet with the piezoceramic starting composition is printed on both sides with the electrode materials.
  • the Elect ⁇ clear materials can thereby be the same or different. Subsequent debindering and sintering results in the piezoelectric element.
  • a piezoelectric element in which the electrode material and / or the wider ⁇ re electrode material at least one element selected from the group consisting of silver, copper and palladium elemental metal.
  • the piezoceramic material or the piezoelectric element is produced in particular by co-sintering the piezoceramic starting composition and the electrode material (cofiring).
  • the electrode material may consist of the pure metals, for example, only of silver or only of copper. An alloy of said metals is also possible, for example an alloy of silver and palladium.
  • the sintering to the piezoceramic material can be carried out both in reducing or oxidizing sintering atmosphere.
  • a reducing sintering atmosphere almost no oxygen is present.
  • An oxygen partial pressure is less than 1-10 -2 mbar, and preferably less than 1-10 -3 mbar.
  • any piezoceramic component with the piezoceramic material are produced.
  • the piezoceramic component mainly comprises at least one top ⁇ be signed piezo element.
  • the piezoceramic component with the piezoelement is selected from the group of piezoceramic bending transducers, piezoceramic multilayer actuator, piezoceramic transformer, piezoceramic motor and piezoceramic ultrasonic transducer.
  • the piezoelectric element is for example part of a piezoelectric bending transducer.
  • FIG. 1 shows a ceramic piezoelectric element in a lateral cross section.
  • Figure 2 shows a piezoelectric component having a plurality of piezoelectric elements in a lateral cross section.
  • Figure 3 shows the d33 ⁇ coefficient of the at different
  • FIG. 4 shows the permittivities of the exemplary embodiments.
  • the material has a perovskite phase with a subsequent perovskite phase composition: (Li x K ! X x y Na y ) (Nbi_t-uTa t Sb u ) 0 3 .
  • tungsten bronze-phase with the following tungsten bronze-phase composition (M 11 ⁇ (Li x K! _ X _ Yna y)! _ M (Nb! _ W Ta w) 5 0 15 + VA '2m
  • the trivalent metal M 111 is Ne ⁇ odym (Nd 3+ ).
  • the proportion of the tungsten bronze phase in the piezoceramic material is 10% by volume.
  • the proportion of perovskite phase be ⁇ contributes 90 vol .-%.
  • Tablet made of piezoceramic material For this purpose, pulverulent, oxidic starting materials are pressed together to form a ceramic green body in the form of a tablet and sintered at temperatures of 1140.degree. C., 1150.degree. C. or 1160.degree. On the main surfaces of each resulting tablet electrode layers of silver are applied, via which an electric field is coupled into the ceramic. The result is a piezoelectric element with electrode layers of Sil ⁇ over and arranged therebetween piezoceramic layer with the respective piezoceramic material.
  • the d33 coefficients of the piezoceramic materials with dopings of less than 1.0 mol% are increased compared with the undoped piezoceramics (FIG. 3).
  • the values at% egg ⁇ ner Nd doping of 1.0 mol are. Lowered.
  • a piezoelectric component 1 is produced with the pie ⁇ zokeramischen material.
  • the piezoelectric component 1 is according to a first embodiment, a piezoelectric actuator 1 in monolithic multilayer construction ( Figure 2).
  • the piezoactuator 1 consists of a multiplicity of piezoelements 10 arranged one above the other in a stack (FIG. 1).
  • Each of the piezoelectric elements 10 has an electrode layer 11, a further electrode layer 12 and an electrode layer between the electrodes. denstoffen 11 and 12 arranged piezoceramic layer 13.
  • the adjacent in the stack piezo elements 10 each have ⁇ wells on a common electrode layer.
  • the electrode ⁇ layers 11 and 12 consist of (approximately) pure silver.
  • the electrode layers 11 and 12 comprise an electrode material of a silver-palladium alloy in which palladium is contained in a proportion of 5% by weight.
  • the green sheets are dried, printed with a paste containing the electrode material stacked lami ⁇ defined, binder removal and sintered to the piezoelectric actuator 1 (as the electrode material silver or silver-palladium alloy) under an oxidizing sintering atmosphere.
  • the resulting monolithic piezoceramic multi-layer actuator is used to actuate a fuel injection valve of an internal combustion engine of a motor vehicle.
  • Other, not shown embodiments such as piezokera ⁇ mixing bending transducer, piezoceramic transformer or piezoceramic ultrasonic transducer with the new piezokera mixing material are also accessible.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Compositions Of Oxide Ceramics (AREA)

Abstract

L'invention concerne un matériau piézo-céramique multiphase sans plomb, présentant au moins une phase pérovskite ayant la composition de phase pérovskite (LixK1-x-yNay) (Nb1-t-uTatSbu) O3 et au moins une phase bronze au tungstène ayant la composition de phases bronze au tungstène (MIII m(LixK1-x-yNay)1-m(Nb1-wTaw) 5O15 + VA' 2m, dans laquelle MIII désigne au moins un métal trivalent, VA' et espace A désignent des vides et présentent les relations suivantes : 0 < m ≤ 0,05; 0 ≤ t ≤ 0,15; 0 ≤ u ≤ 0,15; 0 ≤ w ≤ 1; 0 ≤ x ≤ 0,15; 0,25 ≤ y ≤ 0,75. L'invention concerne en outre un procédé de production d'un composant piézo-céramique doté du matériau piézo-céramique, procédé comprenant les étapes suivantes : a) préparation d'un corps de base ayant la composition de départ piézo-céramique du matériau piézo-céramique; et b) traitement thermique du corps de base, le matériau piézo-céramique du composant prenant naissance à partir de la composition de départ piézo-céramique. Le composant piézo-céramique est, par exemple, un transducteur à ultrasons ou un transducteur de flexion piézo-céramique. En particulier, le composant piézocéramique est un piézo-actionneur multicouche qui est utilisé pour la commande d'une soupape d'admission de carburant d'un moteur à combustion interne d'un véhicule automobile.
EP11725704A 2010-06-30 2011-06-08 Matériau piézo-céramique sans plomb à phase pérovskite et à phase bronze au tungstène, et procédé de production d'un composant piézo-céramique doté de ce matériau Withdrawn EP2548237A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010025670A DE102010025670A1 (de) 2010-06-30 2010-06-30 Bleifreier piezokeramischer Werkstoff mit Perowskit-Phase und Wolframbronze-Phase und Verfahren zum Herstellen eines piezokeramischen Bauteils mit dem Werkstoff
PCT/EP2011/059479 WO2012000752A1 (fr) 2010-06-30 2011-06-08 Matériau piézo-céramique sans plomb à phase pérovskite et à phase bronze au tungstène, et procédé de production d'un composant piézo-céramique doté de ce matériau

Publications (1)

Publication Number Publication Date
EP2548237A1 true EP2548237A1 (fr) 2013-01-23

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EP11725704A Withdrawn EP2548237A1 (fr) 2010-06-30 2011-06-08 Matériau piézo-céramique sans plomb à phase pérovskite et à phase bronze au tungstène, et procédé de production d'un composant piézo-céramique doté de ce matériau

Country Status (4)

Country Link
EP (1) EP2548237A1 (fr)
JP (1) JP2013534898A (fr)
DE (1) DE102010025670A1 (fr)
WO (1) WO2012000752A1 (fr)

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