EP3145894A1 - Biokeramisches bauteil - Google Patents
Biokeramisches bauteilInfo
- 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- Withdrawn
Links
- 239000003462 bioceramic Substances 0.000 title claims abstract description 33
- MCMNRKCIXSYSNV-UHFFFAOYSA-N ZrO2 Inorganic materials O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims abstract description 71
- 239000000203 mixture Substances 0.000 claims abstract description 56
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 claims abstract description 30
- 229910010293 ceramic material Inorganic materials 0.000 claims abstract description 29
- 239000011159 matrix material Substances 0.000 claims abstract description 25
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims abstract description 19
- 239000013078 crystal Substances 0.000 claims abstract description 18
- 229910000420 cerium oxide Inorganic materials 0.000 claims abstract description 16
- BMMGVYCKOGBVEV-UHFFFAOYSA-N oxo(oxoceriooxy)cerium Chemical compound [Ce]=O.O=[Ce]=O BMMGVYCKOGBVEV-UHFFFAOYSA-N 0.000 claims abstract description 16
- SIWVEOZUMHYXCS-UHFFFAOYSA-N oxo(oxoyttriooxy)yttrium Chemical compound O=[Y]O[Y]=O SIWVEOZUMHYXCS-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000000126 substance Substances 0.000 claims abstract description 9
- 239000012535 impurity Substances 0.000 claims abstract description 7
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 30
- 239000000843 powder Substances 0.000 claims description 19
- 238000000034 method Methods 0.000 claims description 15
- 238000005245 sintering Methods 0.000 claims description 11
- 238000004519 manufacturing process Methods 0.000 claims description 9
- 229910052684 Cerium Inorganic materials 0.000 claims description 7
- 238000000227 grinding Methods 0.000 claims description 7
- CETPSERCERDGAM-UHFFFAOYSA-N ceric oxide Chemical compound O=[Ce]=O CETPSERCERDGAM-UHFFFAOYSA-N 0.000 claims description 6
- 229910000422 cerium(IV) oxide Inorganic materials 0.000 claims description 6
- 230000000087 stabilizing effect Effects 0.000 claims description 6
- 239000000470 constituent Substances 0.000 claims description 5
- 229910052746 lanthanum Inorganic materials 0.000 claims description 5
- RUDFQVOCFDJEEF-UHFFFAOYSA-N yttrium(III) oxide Inorganic materials [O-2].[O-2].[O-2].[Y+3].[Y+3] RUDFQVOCFDJEEF-UHFFFAOYSA-N 0.000 claims description 5
- 238000000280 densification Methods 0.000 claims description 4
- 238000003825 pressing Methods 0.000 claims description 4
- 238000012545 processing Methods 0.000 claims description 4
- 238000001746 injection moulding Methods 0.000 claims description 3
- 238000005498 polishing Methods 0.000 claims description 3
- 229910052777 Praseodymium Inorganic materials 0.000 claims description 2
- 210000004394 hip joint Anatomy 0.000 claims description 2
- 210000000629 knee joint Anatomy 0.000 claims description 2
- 238000007517 polishing process Methods 0.000 claims description 2
- 210000002414 leg Anatomy 0.000 claims 2
- 229910017414 LaAl Inorganic materials 0.000 claims 1
- 210000001145 finger joint Anatomy 0.000 claims 1
- 210000000323 shoulder joint Anatomy 0.000 claims 1
- 238000005507 spraying Methods 0.000 claims 1
- 239000000919 ceramic Substances 0.000 abstract description 8
- 229910001928 zirconium oxide Inorganic materials 0.000 abstract description 5
- 229910002637 Pr6O11 Inorganic materials 0.000 abstract 1
- 235000012431 wafers Nutrition 0.000 abstract 1
- 230000015572 biosynthetic process Effects 0.000 description 11
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 8
- MMKQUGHLEMYQSG-UHFFFAOYSA-N oxygen(2-);praseodymium(3+) Chemical compound [O-2].[O-2].[O-2].[Pr+3].[Pr+3] MMKQUGHLEMYQSG-UHFFFAOYSA-N 0.000 description 6
- 229910003447 praseodymium oxide Inorganic materials 0.000 description 6
- 230000006641 stabilisation Effects 0.000 description 6
- 238000011105 stabilization Methods 0.000 description 6
- RKTYLMNFRDHKIL-UHFFFAOYSA-N copper;5,10,15,20-tetraphenylporphyrin-22,24-diide Chemical compound [Cu+2].C1=CC(C(=C2C=CC([N-]2)=C(C=2C=CC=CC=2)C=2C=CC(N=2)=C(C=2C=CC=CC=2)C2=CC=C3[N-]2)C=2C=CC=CC=2)=NC1=C3C1=CC=CC=C1 RKTYLMNFRDHKIL-UHFFFAOYSA-N 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 239000002131 composite material Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- MRELNEQAGSRDBK-UHFFFAOYSA-N lanthanum(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[La+3].[La+3] MRELNEQAGSRDBK-UHFFFAOYSA-N 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000002360 preparation method Methods 0.000 description 4
- 238000001694 spray drying Methods 0.000 description 4
- 239000011521 glass Substances 0.000 description 3
- 239000003381 stabilizer Substances 0.000 description 3
- 229910052727 yttrium Inorganic materials 0.000 description 3
- 229910021193 La 2 O 3 Inorganic materials 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 238000005275 alloying Methods 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical compound [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 0.000 description 2
- 239000011651 chromium Substances 0.000 description 2
- 230000000295 complement effect Effects 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- GNTDGMZSJNCJKK-UHFFFAOYSA-N divanadium pentaoxide Chemical compound O=[V](=O)O[V](=O)=O GNTDGMZSJNCJKK-UHFFFAOYSA-N 0.000 description 2
- 239000002241 glass-ceramic Substances 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 238000007731 hot pressing Methods 0.000 description 2
- 239000007943 implant Substances 0.000 description 2
- -1 lanthanum aluminate Chemical class 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229920000620 organic polymer Polymers 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 239000006104 solid solution Substances 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- DLYUQMMRRRQYAE-UHFFFAOYSA-N tetraphosphorus decaoxide Chemical compound O1P(O2)(=O)OP3(=O)OP1(=O)OP2(=O)O3 DLYUQMMRRRQYAE-UHFFFAOYSA-N 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910001233 yttria-stabilized zirconia Inorganic materials 0.000 description 2
- 229910003668 SrAl Inorganic materials 0.000 description 1
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 description 1
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- QQHSIRTYSFLSRM-UHFFFAOYSA-N alumanylidynechromium Chemical compound [Al].[Cr] QQHSIRTYSFLSRM-UHFFFAOYSA-N 0.000 description 1
- 150000004645 aluminates Chemical class 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 229910052810 boron oxide Inorganic materials 0.000 description 1
- VLOFLNGRXXADOF-UHFFFAOYSA-N cerium(3+) oxygen(2-) yttrium(3+) Chemical compound [Y+3].[O-2].[Ce+3].[O-2].[O-2] VLOFLNGRXXADOF-UHFFFAOYSA-N 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229910000423 chromium oxide Inorganic materials 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- JKWMSGQKBLHBQQ-UHFFFAOYSA-N diboron trioxide Chemical compound O=BOB=O JKWMSGQKBLHBQQ-UHFFFAOYSA-N 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- YBMRDBCBODYGJE-UHFFFAOYSA-N germanium oxide Inorganic materials O=[Ge]=O YBMRDBCBODYGJE-UHFFFAOYSA-N 0.000 description 1
- 238000001513 hot isostatic pressing Methods 0.000 description 1
- 238000010335 hydrothermal treatment Methods 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- PVADDRMAFCOOPC-UHFFFAOYSA-N oxogermanium Chemical compound [Ge]=O PVADDRMAFCOOPC-UHFFFAOYSA-N 0.000 description 1
- PUDIUYLPXJFUGB-UHFFFAOYSA-N praseodymium atom Chemical compound [Pr] PUDIUYLPXJFUGB-UHFFFAOYSA-N 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 229910001404 rare earth metal oxide Inorganic materials 0.000 description 1
- 239000011226 reinforced ceramic Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 229910002076 stabilized zirconia Inorganic materials 0.000 description 1
- 229910052714 tellurium Inorganic materials 0.000 description 1
- PORWMNRCUJJQNO-UHFFFAOYSA-N tellurium atom Chemical compound [Te] PORWMNRCUJJQNO-UHFFFAOYSA-N 0.000 description 1
- 229910003451 terbium oxide Inorganic materials 0.000 description 1
- SCRZPWWVSXWCMC-UHFFFAOYSA-N terbium(iii) oxide Chemical compound [O-2].[O-2].[O-2].[Tb+3].[Tb+3] SCRZPWWVSXWCMC-UHFFFAOYSA-N 0.000 description 1
- 210000001519 tissue Anatomy 0.000 description 1
- 238000012549 training Methods 0.000 description 1
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
Classifications
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- 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
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- 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
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- 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
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- 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
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- 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)
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- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
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- 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
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- 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
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- 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
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- 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
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- 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
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- 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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Abstract
Description
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EP14168854.9A EP2947061B1 (de) | 2014-05-19 | 2014-05-19 | Biokeramische Komponente |
PCT/EP2015/060889 WO2015177089A1 (de) | 2014-05-19 | 2015-05-18 | Biokeramisches bauteil |
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EP3145894A1 true EP3145894A1 (de) | 2017-03-29 |
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EP15724240.5A Withdrawn EP3145894A1 (de) | 2014-05-19 | 2015-05-18 | Biokeramisches bauteil |
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ES2057911T3 (es) | 1990-08-06 | 1994-10-16 | Cerasiv Gmbh | Cuerpo moldeado sinterizado y su utilizacion. |
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 |
EP2086908B1 (de) * | 2006-10-05 | 2013-07-24 | Vita Zahnfabrik H. Rauter GmbH & Co. KG | Gesintertes material, umfassend stabilisiertes zirconiumoxid, aluminiumoxid und seltenerdmetallaluminatplättchen, herstellungsverfahren und verwendungen |
WO2011000390A1 (en) * | 2009-06-30 | 2011-01-06 | Aktiebolaget Skf | Zirconia-alumina ceramic materials |
DE102010063290A1 (de) * | 2009-12-16 | 2011-06-22 | CeramTec GmbH, 73207 | Keramischer Verbundwerkstoff, bestehend aus den Hauptbestandteilen Aluminiumoxid und Zirkonoxid und einer dispersoiden Phase |
EP2529694B1 (de) * | 2011-05-31 | 2017-11-15 | Ivoclar Vivadent AG | Verfahren zur generativen Herstellung von Keramikformkörpern durch 3D-Inkjet-Drucken |
RU2549945C2 (ru) * | 2013-06-24 | 2015-05-10 | Закрытое акционерное общество "НЭВЗ-КЕРАМИКС" | Способ получения керамического композитного материала на основе оксидов алюминия и циркония |
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RU2016149516A (ru) | 2018-06-20 |
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EP2947061B1 (de) | 2020-02-19 |
RU2684551C2 (ru) | 2019-04-09 |
RU2016149516A3 (de) | 2018-06-20 |
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