BR9908115A - Processo para a prevenção da degradação a baixa temperatura de zircÈnia tetragonal contendo matérias primas - Google Patents
Processo para a prevenção da degradação a baixa temperatura de zircÈnia tetragonal contendo matérias primasInfo
- Publication number
- BR9908115A BR9908115A BR9908115-6A BR9908115A BR9908115A BR 9908115 A BR9908115 A BR 9908115A BR 9908115 A BR9908115 A BR 9908115A BR 9908115 A BR9908115 A BR 9908115A
- Authority
- BR
- Brazil
- Prior art keywords
- tetragonal zirconia
- low temperature
- containing raw
- raw materials
- zirconia containing
- Prior art date
Links
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
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/009—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone characterised by the material treated
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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
- C04B35/48—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 zirconium or hafnium oxides, zirconates, zircon or hafnates
- C04B35/486—Fine ceramics
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- C—CHEMISTRY; METALLURGY
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- 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
- C04B35/48—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 zirconium or hafnium oxides, zirconates, zircon or hafnates
- C04B35/486—Fine ceramics
- C04B35/488—Composites
- C04B35/4885—Composites with aluminium oxide
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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
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
- C04B35/632—Organic additives
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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
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/0072—Heat treatment
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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
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/80—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only ceramics
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- C—CHEMISTRY; METALLURGY
- 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
- 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
- C04B2235/3229—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
- C04B2235/60—Aspects relating to the preparation, properties or mechanical treatment of green bodies or pre-forms
- C04B2235/602—Making the green bodies or pre-forms by moulding
- C04B2235/6022—Injection moulding
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- C04B2235/60—Aspects relating to the preparation, properties or mechanical treatment of green bodies or pre-forms
- C04B2235/602—Making the green bodies or pre-forms by moulding
- C04B2235/6027—Slip casting
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
- C04B2235/656—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes characterised by specific heating conditions during heat treatment
- C04B2235/6562—Heating rate
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
- C04B2235/656—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes characterised by specific heating conditions during heat treatment
- C04B2235/6567—Treatment time
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
- C04B2235/66—Specific sintering techniques, e.g. centrifugal sintering
- C04B2235/661—Multi-step sintering
- C04B2235/662—Annealing after sintering
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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
- 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
- C04B2235/77—Density
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Composite Materials (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Inorganic Chemistry (AREA)
- Compositions Of Oxide Ceramics (AREA)
Abstract
"PROCESSO PARA A PREVENçãO DA DEGRADAçãO A BAIXA TEMPERATURA DE ZIRCÈNIA TETRAGONAL CONTENDO MATéRIAS-PRIMAS". Um corpo de cerâmica apresentando uma região de superfície contendo zircónia tetragonal é sinterizado a pelo menos 95% da densidade teórica a uma temperatura abaixo de em torno 1550<198>C. A região de superfície é então tratada termicamente para reversão das tensões locais na mesma. A degradação a baixa temperatura na zircónia tetragonal, e a zircónia tetragonal contendo matéria-prima, é significativamente reduzida. A cerâmica tratada termicamente é especialmente adequada para uso em componentes estruturais tais como válvulas compartimentos de máquinas, pistões (câmaras) e similares os quais, durante operação, são freq³entemente expostos a uma temperatura indo da temperatura ambiente a 500<198>C por prolongados períodos de tempo.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/026,228 US5932507A (en) | 1998-02-19 | 1998-02-19 | Method for preventing low-temperature degradation of tetragonal zirconia containing materials |
PCT/US1999/003514 WO1999042420A1 (en) | 1998-02-19 | 1999-02-18 | Method for preventing low-temperature degradation of tetragonal zirconia containing materials |
Publications (1)
Publication Number | Publication Date |
---|---|
BR9908115A true BR9908115A (pt) | 2002-01-15 |
Family
ID=21830593
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
BR9908115-6A BR9908115A (pt) | 1998-02-19 | 1999-02-18 | Processo para a prevenção da degradação a baixa temperatura de zircÈnia tetragonal contendo matérias primas |
Country Status (9)
Country | Link |
---|---|
US (1) | US5932507A (pt) |
JP (1) | JP2002503631A (pt) |
KR (1) | KR100614122B1 (pt) |
AU (1) | AU3300399A (pt) |
BR (1) | BR9908115A (pt) |
CA (1) | CA2320830A1 (pt) |
MY (1) | MY118264A (pt) |
TW (1) | TW457223B (pt) |
WO (1) | WO1999042420A1 (pt) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7201687B2 (en) * | 2003-03-06 | 2007-04-10 | Borgwarner Inc. | Power transmission chain with ceramic joint components |
EA011879B1 (ru) * | 2004-09-24 | 2009-06-30 | Эмджин Инк. | МОЛЕКУЛЫ С МОДИФИЦИРОВАННЫМ Fc ФРАГМЕНТОМ |
GB0512666D0 (en) * | 2005-06-22 | 2005-07-27 | Univ Loughborough | Method for concentrating nanosuspensions |
GB2464473B (en) | 2008-10-15 | 2012-09-12 | Univ Loughborough | Deformable granule production |
GB0821674D0 (en) * | 2008-11-27 | 2008-12-31 | Univ Loughborough | Ceramic |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3415803A1 (de) * | 1984-04-27 | 1985-10-31 | Max-Planck-Gesellschaft zur Förderung der Wissenschaften e.V., 3400 Göttingen | Hochfester und temperaturbestaendiger formkoerper aus zirkoniumdioxid (zro(pfeil abwaerts)2(pfeil abwaerts)) und verfahren zu seiner herstellung |
US4525464A (en) * | 1984-06-12 | 1985-06-25 | Max-Planck-Gesellschaft Zur Forderung Der Wissenschaften | Ceramic body of zirconium dioxide (ZrO2) and method for its preparation |
US4866014A (en) * | 1987-04-13 | 1989-09-12 | Ford Motor Company | Method of making a stress resistant, partially stabilized zirconia ceramic |
US4853353A (en) * | 1988-01-25 | 1989-08-01 | Allied-Signal Inc. | Method for preventing low-temperature degradation of tetragonal zirconia containing materials |
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1998
- 1998-02-19 US US09/026,228 patent/US5932507A/en not_active Expired - Lifetime
-
1999
- 1999-02-18 BR BR9908115-6A patent/BR9908115A/pt not_active Application Discontinuation
- 1999-02-18 KR KR1020007009179A patent/KR100614122B1/ko not_active IP Right Cessation
- 1999-02-18 WO PCT/US1999/003514 patent/WO1999042420A1/en active IP Right Grant
- 1999-02-18 CA CA002320830A patent/CA2320830A1/en not_active Abandoned
- 1999-02-18 AU AU33003/99A patent/AU3300399A/en not_active Abandoned
- 1999-02-18 MY MYPI99000566A patent/MY118264A/en unknown
- 1999-02-18 JP JP2000532375A patent/JP2002503631A/ja active Pending
- 1999-02-19 TW TW088102419A patent/TW457223B/zh not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
TW457223B (en) | 2001-10-01 |
WO1999042420A1 (en) | 1999-08-26 |
CA2320830A1 (en) | 1999-08-26 |
KR20010041132A (ko) | 2001-05-15 |
KR100614122B1 (ko) | 2006-08-23 |
JP2002503631A (ja) | 2002-02-05 |
AU3300399A (en) | 1999-09-06 |
US5932507A (en) | 1999-08-03 |
MY118264A (en) | 2004-09-30 |
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Legal Events
Date | Code | Title | Description |
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B07A | Technical examination (opinion): publication of technical examination (opinion) [chapter 7.1 patent gazette] | ||
B09B | Patent application refused [chapter 9.2 patent gazette] |
Free format text: INDEFIRO O PRESENTE PEDIDO DE PATENTE COMO INVENCAO DE ACORDO COM O ART. 8O DA LPI. |