EP3145894A1 - Élément biocéramique - Google Patents

Élément biocéramique

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Publication number
EP3145894A1
EP3145894A1 EP15724240.5A EP15724240A EP3145894A1 EP 3145894 A1 EP3145894 A1 EP 3145894A1 EP 15724240 A EP15724240 A EP 15724240A EP 3145894 A1 EP3145894 A1 EP 3145894A1
Authority
EP
European Patent Office
Prior art keywords
oxide
proportion
mol
volume
ceramic material
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Withdrawn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
EP15724240.5A
Other languages
German (de)
English (en)
Inventor
Karl BILLAU
Gundula Kiefer
Wolfgang Burger
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.)
Bbl Technology Transfer & Co KG GmbH
Original Assignee
Bbl Technology Transfer & Co KG GmbH
Bbl Tech Transfer & Co KG GmbH
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 Bbl Technology Transfer & Co KG GmbH, Bbl Tech Transfer & Co KG GmbH filed Critical Bbl Technology Transfer & Co KG GmbH
Publication of EP3145894A1 publication Critical patent/EP3145894A1/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Withdrawn legal-status Critical Current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
    • C04B35/44—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 aluminates
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
    • A61L27/02—Inorganic materials
    • A61L27/10—Ceramics or glasses
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
    • A61L27/02—Inorganic materials
    • A61L27/10—Ceramics or glasses
    • A61L27/105—Ceramics or glasses containing Al2O3
    • 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
    • C04B35/10—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 aluminium oxide
    • C04B35/111—Fine ceramics
    • C04B35/117—Composites
    • C04B35/119—Composites with zirconium 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
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/64—Burning or sintering processes
    • C04B35/645—Pressure sintering
    • C04B35/6455—Hot isostatic pressing
    • 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
    • C04B35/71—Ceramic products containing macroscopic reinforcing agents
    • C04B35/78—Ceramic products containing macroscopic reinforcing agents containing non-metallic materials
    • C04B35/80—Fibres, filaments, whiskers, platelets, or the like
    • 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
    • C04B2235/3217—Aluminum oxide or oxide forming salts thereof, e.g. bauxite, alpha-alumina
    • C04B2235/3222—Aluminates other than alumino-silicates, e.g. spinel (MgAl2O4)
    • 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
    • C04B2235/3224—Rare earth oxide or oxide forming salts thereof, e.g. scandium oxide
    • C04B2235/3225—Yttrium 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
    • C04B2235/3227—Lanthanum 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
    • C04B2235/3229—Cerium 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
    • C04B2235/3231—Refractory metal oxides, their mixed metal oxides, or oxide-forming salts thereof
    • C04B2235/3244—Zirconium oxides, zirconates, hafnium oxides, hafnates, or oxide-forming salts thereof
    • C04B2235/3246—Stabilised zirconias, e.g. YSZ or cerium stabilised zirconia
    • 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
    • C04B2235/78—Grain sizes and shapes, product microstructures, e.g. acicular grains, equiaxed grains, platelet-structures

Definitions

  • the invention relates to a bioceramic component, which is at least partially made of ceramic material with an aluminum oxide matrix and zirconium dioxide, and to a method for producing such a bioceramic component.
  • Bioceramic components of this type namely artificial prostheses such.
  • hip joint implants or knee joint implants are given in WO 2011/083 023 A1 (EP 2 513 010 A1).
  • the composition of the ceramic material described therein comprises dispersed zirconium oxide, the tetragonal modification preferably being obtained by mechanical stabilization.
  • chemical stabilizers such as yttrium oxide Y2O3 are considered disadvantageous because of the associated hydrothermal aging.
  • a requirement for the mechanical stabilization is an alumina content of at least 65% by volume and a zirconium oxide content of 10 to 35% by volume.
  • EP 0 542 815 B1 describes a ceramic material which has become established in the market.
  • DE 198 50 366 A1 likewise describes a platelet-reinforced sintered ceramic material having a composition as described in EP 0 542 815 B1. However, platelet formation is based on different oxides.
  • WO 2008/040 813 A1 has a ceramic material as its content, which has a zirconium dioxide matrix, the zirconium dioxide being mixed-stabilized.
  • WO 2011/000 390 A1 proposes mixed stabilization of zirconium dioxide with yttrium oxide and cerium oxide. Also in this case, the ceramic (as in the aforementioned WO 2008/040 813 A1) is always based on a stabilized zirconium dioxide matrix, the matrix containing 50-75% by weight of the total composition. tion. As the third phase of the ceramic composition, an alkaline earth aluminate or LaAlnOi 8 is mentioned. Praseodymium oxide is not mentioned.
  • Kern "Effect of In-Formed Cerium Hexaaluminates Precipitates on Properties of Alumina -24 Vol% Zirconia (1.4Y) Composites", JOURNAL OF CERAMIC SCIENCE AND TECHNOLOGY, vol.4, no 4, 5 August 2013 (2013-08-05), pages 177-186, deals with the Material system of alumina-yttrium-stabilized zirconia and the addition of cerium oxide and the sintering in a reducing atmosphere. In both works, the formation of the CeAlnOi 8 phase is described by the application of a reducing atmosphere. In the second mentioned document mentions that for the formation of the CeAlnOi 8 phase a hot pressing temperature of 1425 ° C is not sufficient. There is no talk of mixed crystal formation.
  • EP 2 684 555 A2 proposes a glass or a glass ceramic which contains inter alia aluminum oxide and rare earth oxides or yttrium oxide. These oxides are incorporated in a glass or a glass ceramic, with boron oxide, germanium oxide, phosphorus pentoxide, silicon dioxide, tellurium oxide and vanadium pentoxide being used as the glass former.
  • the main goal is to generate an amorphous phase.
  • the object of the present invention is to provide bioceramic components which have improved material stability.
  • the bioceramic component is at least partially made of ceramic material, which has the following composition:
  • zirconium dioxide 10 to 45% by volume of zirconium dioxide, which is replaced by yttrium oxide in a proportion of 0.5 to 2.5 mol%, based on the zirconium dioxide and by cerium oxide in one
  • Proportion of 2 - 10 mol% based on the zirconia is stabilized, 0.1-1.0% by volume of Pr 6 On, which forms a mixed crystal with the aluminum oxide and, together with cerium oxide, acts as a bridging oxide between the aluminum oxide and zirconium dioxide,
  • the proportion of alumina and zirconia together with the relevant bridging oxide comprising further
  • Components of the composition to complement unavoidable impurities to 100%.
  • Alumina and zirconia are effective,
  • the proportion of alumina and zirconia together with the relevant, the bridging oxide comprising constituents of the composition to complement unavoidable impurities to 100%.
  • bioceramic components are the subject of claim 10.
  • the step of producing the ceramic material comprises as substeps:
  • the proportion of alumina and zirconia with its constituents including the bridging oxide add up to 100 vol .-%, except for unavoidable impurities. So if z.
  • the proportions of zirconium dioxide and of aluminum oxide matrix are chosen such that (with the exception of the unavoidable impurities) 100% by volume results, said range boundaries forming the outer frame , The upper limit of the The proportion of aluminum oxide and / or of zirconium oxide is thus reduced in accordance with the proportion of Pr 6 On added, so that the addition is 100% complied with.
  • composition having the chemical stabilization and bridge-forming oxide taught in claim 1 gives bioceramic components of high stability, which in particular also have high resistance to moisture and temperature.
  • the stability is enhanced by the added ceria, which stabilizes the metastable zirconia phase and forms anisotropic crystals with alumina, the process being directed at the formation of the crystallites.
  • the proportion of the matrix in the form of hexagonal platelets of the composition LaAlnO-ts is advantageously 20-60% by volume, in particular 33-50% by volume; the proportion of stabilizing yttrium oxide is advantageously 1 to 2 mol%, in particular 1, 5 to 1, 8 mol%; the proportion of stabilizing cerium oxide is advantageously from 2.5 to 6 mol%, in particular from 3 to 5 mol%; and the proportion of Pr 6 On advantageously 0.2 to 0.8 vol .-%, in particular 0.25 to 0.5 vol .-%.
  • Fig. 1 shows a bioceramic component, a ball head 1, which can be used as part of a ball joint.
  • the ball head 1 is compatible with biological tissue (biocompatible) and has a spherical portion 10, which is to fit accurately into a ball socket of a joint of a patient.
  • a hollow receiver 11 is formed to insert and fix therein an outwardly projecting member.
  • the ball head 1 is made of a ceramic material having the above-described composition.
  • the surface 10 is polished and gives permanently stable, very good sliding properties.
  • the receptacle 11 is formed so that it ensures a stable connection with the protruding part inserted therein, including z. B. a screw, adhesive connection and / or a cementing is used (come).
  • the preparation of the ceramic material having the stated composition and the bioceramic component produced therefrom comprises as essential steps: dispersing the constituents in water
  • the ceramic material is therefore provided that the composition of the ceramic material by mixing aluminum oxide Al 2 O 3 , zirconium dioxide ZrO 2 , yttrium oxide Y 2 O 3 , cerium oxide CeO 2 , lanthanum oxide La 2 O 3 and praseodymium Pr 6 On in corresponding proportions to the powder mixture and by subsequent sintering is produced. After sintering, an alumina matrix in a proportion of 55-90% by volume and zirconium dioxide in a proportion of 10-45% by volume are present in the finished material, the zirconium dioxide being at least 75% by volume in the finished material. % is in its tetragonal modification and is chemically stabilized by a mixture of yttria and ceria.
  • a proportion of 10 to 75% by volume of the aluminum oxide matrix is in the form of hexagonal platelets of the composition (Ce, La) -AlnOie (cerium or lanthanum aluminate).
  • the ceria is preferably in its tetravalent oxidation state and acts as a stabilizer oxide for the zirconia through the formation of a solid solution.
  • Part of the cerium oxide may also be in its trivalent oxidation state. This then forms (Ce, La) -aluminate in the form of anisotropic hexagonal platelets.
  • a corresponding mixed crystal is formed during sintering, preferably with the aluminum oxide matrix, specifically by chemical reaction with the aluminum oxide and praseodymium oxide.
  • praseodymium oxide can also form a mixed crystal with zirconium dioxide by a solid-state chemical reaction.
  • the mixed crystal formation of Y 2 O 3 -CeO 2 -ZrO 2 '.Pr takes place already at temperatures between 1390-1480 ° C.
  • Pr 6 On acts as a bridging agent for the consistent cohesion of the alumina / zirconia composite with increased fracture toughness.
  • the chemical composition of the powder mixture consists of the following educts: 55 - (approximately) 90 vol.% Al 2 O 3
  • the formation of the mixed crystal by the chemical reaction of Pr 6 On and Al 2 O 3 or ZrO 2 or the lanthanum aluminate is essential.
  • the chemical mixed stabilization results in the said composition high resistance. This is further enhanced by the fact that the alloyed ceria stabilizes both the metastable zirconia phase and simultaneously but also anisotropically formed crystallites with alumina forms, the process management is aligned with this formation of the crystallites.
  • a homogeneous powder mixture of yttrium- and cerium oxide-coated zirconia grains, alumina, lanthanum oxide and praseodymium oxide is prepared by a Mischmahlung in water in a stirred ball mill, after which in a further step after addition of a binder system, the aqueous powder dispersion a spray-drying process is subjected.
  • the measures contribute that the maximum proportion of yttria in the range of 0.5 to 2.5 mol% and the proportion of cerium oxide in the range between 2 to 10 mol% based on the zirconia.
  • the resistance of the ceramic material is favored by the fact that the proportion of hexagonal platelets is in the range of 20-60% by volume, in particular 33-50% by volume, of the aluminum oxide matrix. Further advantages result from the fact that the maximum proportion of yttrium oxide is in the range from 1.0 to 2.0 mol%, in particular from 1.5 to 1.8 mol%, based on the zirconium dioxide, and furthermore in that the maximum proportion of cerium oxide is in the range from 2.5 to 6 mol%, in particular from 3 to 5 mol%, based on the zirconium dioxide.
  • the proportion of alloying of Pr 6 O in the range of 0.2 to 0.8 vol .-%, in particular from 0.25 to 0.5 vol .-% is.
  • the spray granules obtained from the spray-drying process is compressed directly or plasticized with the addition of organic polymers and then processed by injection molding to form the bioceramic component.
  • the preparation of the powder mixture takes place via the mixed grinding, followed by a spray-drying process. Either the spray granules are pressed directly or plasticized with the addition of organic polymers and then processed by injection molding to the bioceramic component.
  • compositions of the novel ceramic materials are reproduced in the following table with relevant parameters, wherein also two comparative examples are mentioned.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Composite Materials (AREA)
  • Inorganic Chemistry (AREA)
  • Dermatology (AREA)
  • Medicinal Chemistry (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Transplantation (AREA)
  • Epidemiology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials For Medical Uses (AREA)
  • Compositions Of Oxide Ceramics (AREA)

Abstract

L'invention concerne un élément biocéramique fabriqué, au moins en partie, en matériau céramique présentant la composition suivante : 55 à 90 % en volume d'une matrice à base d'oxyde d'aluminium, 10 à 75 % en volume de la matrice à base d'oxyde d'aluminium ayant la forme de plaquettes hexagonales de composition chimique LaAI11O18, 10 à 45 % en volume d'oxyde de zirconium, qui est stabilisé par de l'oxyde de d'yttrium dans une proportion allant de 0,5 à 2,5 % en moles rapporté à l'oxyde de zirconium et par du ceroxyde dans une proportion allant de 2 à 10 % en moles rapporté à l'oxyde de zirconium, 0,1 à 1,0 % en volume de Pr6O11, qui forme un cristal mixte avec l'oxyde d'aluminium et qui, conjointement avec le ceroxyde, agit comme un oxyde pontant entre l'oxyde d'aluminium et l'oxyde de zirconium. Dans la composition du matériau céramique, la proportion d'oxyde d'aluminium et d'oxyde de zirconium, conjointement avec les autres composants de la composition concernés, est complétée jusqu'à 100 % par des impuretés inévitables.
EP15724240.5A 2014-05-19 2015-05-18 Élément biocéramique Withdrawn EP3145894A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP14168854.9A EP2947061B1 (fr) 2014-05-19 2014-05-19 Composant de biocéramique
PCT/EP2015/060889 WO2015177089A1 (fr) 2014-05-19 2015-05-18 Élément biocéramique

Publications (1)

Publication Number Publication Date
EP3145894A1 true EP3145894A1 (fr) 2017-03-29

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EP14168854.9A Active EP2947061B1 (fr) 2014-05-19 2014-05-19 Composant de biocéramique
EP15724240.5A Withdrawn EP3145894A1 (fr) 2014-05-19 2015-05-18 Élément biocéramique

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Country Status (3)

Country Link
EP (2) EP2947061B1 (fr)
RU (1) RU2684551C2 (fr)
WO (1) WO2015177089A1 (fr)

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US6452957B1 (en) 1997-10-31 2002-09-17 Ceramtec Ag Innovative Ceramic Engineering Sintered shaped body reinforced with platelets
US6984261B2 (en) * 2003-02-05 2006-01-10 3M Innovative Properties Company Use of ceramics in dental and orthodontic applications
GB0428555D0 (en) * 2004-12-30 2005-02-09 Magnesium Elektron Ltd Composite material for automotive catalyst applications and method of manufacturing
PL2086908T3 (pl) * 2006-10-05 2014-06-30 Oxima Tec Gmbh Material Tech Materiał spiekany zawierający płytki stabilizowanego ditlenku cyrkonu, tlenku glinu i glinianów ziem rzadkich, sposób produkcji i zastosowania
JP5698740B2 (ja) * 2009-06-30 2015-04-08 アクチボラゲット エス ケイ エフＡｋｔｉｅ Ｂｏｌａｇｅｔ Ｓｋｆ ジルコニア−アルミナ・セラミック材料
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EP2947061A1 (fr) 2015-11-25
WO2015177089A1 (fr) 2015-11-26
RU2684551C2 (ru) 2019-04-09
RU2016149516A (ru) 2018-06-20
EP2947061B1 (fr) 2020-02-19

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