JP5445997B2 - ハニカムフィルタ - Google Patents
ハニカムフィルタ Download PDFInfo
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- JP5445997B2 JP5445997B2 JP2009151089A JP2009151089A JP5445997B2 JP 5445997 B2 JP5445997 B2 JP 5445997B2 JP 2009151089 A JP2009151089 A JP 2009151089A JP 2009151089 A JP2009151089 A JP 2009151089A JP 5445997 B2 JP5445997 B2 JP 5445997B2
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- aluminum titanate
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- thermal expansion
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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
- C04B35/01—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
- C04B35/46—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 titanium oxides or titanates
- C04B35/462—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 titanium oxides or titanates based on titanates
- C04B35/478—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 titanium oxides or titanates based on titanates based on aluminium titanates
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/24—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies
- B01D46/2403—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies characterised by the physical shape or structure of the filtering element
- B01D46/2418—Honeycomb filters
- B01D46/2425—Honeycomb filters characterized by parameters related to the physical properties of the honeycomb structure material
- B01D46/24494—Thermal expansion coefficient, heat capacity or thermal conductivity
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- B01D46/2403—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies characterised by the physical shape or structure of the filtering element
- B01D46/2418—Honeycomb filters
- B01D46/2425—Honeycomb filters characterized by parameters related to the physical properties of the honeycomb structure material
- B01D46/2429—Honeycomb filters characterized by parameters related to the physical properties of the honeycomb structure material of the honeycomb walls or cells
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- B01D46/2403—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies characterised by the physical shape or structure of the filtering element
- B01D46/2418—Honeycomb filters
- B01D46/2451—Honeycomb filters characterized by the geometrical structure, shape, pattern or configuration or parameters related to the geometry of the structure
- B01D46/2476—Monolithic structures
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- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/24—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies
- B01D46/2403—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies characterised by the physical shape or structure of the filtering element
- B01D46/2418—Honeycomb filters
- B01D46/2451—Honeycomb filters characterized by the geometrical structure, shape, pattern or configuration or parameters related to the geometry of the structure
- B01D46/2482—Thickness, height, width, length or diameter
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/24—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies
- B01D46/2403—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies characterised by the physical shape or structure of the filtering element
- B01D46/2418—Honeycomb filters
- B01D46/2451—Honeycomb filters characterized by the geometrical structure, shape, pattern or configuration or parameters related to the geometry of the structure
- B01D46/2484—Cell density, area or aspect ratio
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- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/0006—Honeycomb structures
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- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00793—Uses not provided for elsewhere in C04B2111/00 as filters or diaphragms
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- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/0081—Uses not provided for elsewhere in C04B2111/00 as catalysts or catalyst carriers
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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
- C04B2235/3232—Titanium oxides or titanates, e.g. rutile or anatase
- C04B2235/3234—Titanates, not containing zirconia
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- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/50—Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
- C04B2235/52—Constituents or additives characterised by their shapes
- C04B2235/5296—Constituents or additives characterised by their shapes with a defined aspect ratio, e.g. indicating sphericity
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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
- C04B2235/50—Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
- C04B2235/54—Particle size related information
- C04B2235/5418—Particle size related information expressed by the size of the particles or aggregates 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
- C04B2235/50—Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
- C04B2235/54—Particle size related information
- C04B2235/5463—Particle size distributions
- C04B2235/5472—Bimodal, multi-modal or multi-fraction
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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
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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
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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
- C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
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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
- C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
- C04B2235/9607—Thermal properties, e.g. thermal expansion coefficient
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- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Geometry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Thermal Sciences (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Filtering Materials (AREA)
- Compositions Of Oxide Ceramics (AREA)
Description
(製造例1)
酸化チタン360.0g、酸化アルミニウム411.1g、水酸化マグネシウム9.7g、及び酸化ケイ素19.0gを振動ミルにて粉砕しながら、2.0時間混合した。
酸化チタン354.7g、酸化アルミニウム405.0g、水酸化マグネシウム21.3g、及び酸化ケイ素19.0gを振動ミルにて粉砕しながら、2.0時間混合した。
(製造例3)
酸化チタン340.1g、酸化アルミニウム388.3g、水酸化マグネシウム52.6g、及び酸化ケイ素19.0gを振動ミルにて粉砕しながら、2.0時間混合した。
酸化チタン340.1g、酸化アルミニウム388.3g、水酸化マグネシウム52.6g、及び酸化ケイ素19.0gを振動ミルにて粉砕しながら、2.0時間混合した。
得られた生成物は、X線回折にて結晶相を同定したところ、Al2TiO5であった。
酸化チタン340.1g、酸化アルミニウム388.3g、水酸化マグネシウム52.6g、及び酸化ケイ素19.0gを振動ミルにて粉砕しながら、2.0時間混合した。
表2に示すように、実施例1〜9及び比較例6〜8については、ベース材のチタン酸アルミニウムと、添加材のチタン酸アルミニウムを混合して用い、ハニカム焼結体を製造した。実施例1〜9においては、製造例1または2の柱状チタン酸アルミニウムをベース材とし、製造例4または5の粒状チタン酸アルミニウムを添加材として用いた。
得られた各ハニカム焼結体について気孔率、曲げ強度、熱膨張係数、結晶配向度、及び耐熱衝撃温度を以下のようにして測定した。
図3は、ハニカム焼結体を示す斜視図である。図3に示すように、ハニカム焼結体1は、8×8セルを有し、端面1aは、縦1.8cm、横1.8cmの大きさを有している。矢印Aは、押出方向を示しており、矢印Bは押出方向Aに対し垂直な方向を示している。
図5に示すように、上記の8×8セルのハニカム焼結体1を、支持点11及び12に支持した状態で、焼結体1の中心部を押圧棒10で押圧することにより、JIS R1601に準拠して、曲げ強度を測定した。
図3及び図4を参照して説明した、気孔率の測定サンプル3と同様にして、8×8セルのハニカム焼結体1の中心部2から、押出方向Aに沿う長さが2cm程度となるように切り出し、測定サンプル3とした。図6に示すように、測定サンプル3の押出方向Aにおける線膨張係数を、JIS R1618に準拠して測定した。同様に、押出方向Aと垂直な方向Bに沿う長さが2cm程度となるようにハニカム焼結体1の中心部2から測定サンプルを切り出し、この測定サンプルの垂直な方向Bにおける熱膨張係数を測定した。
結晶配向度は、ハニカム焼結体の押出面のX線回折を測定し、(002)面の回折ピーク強度(=I(002))及び(230)面の回折ピーク強度(=I(230))より、以下の式により算出した。
なお、(002)面の回折強度は、2θ=50.8°付近に現れるピークであり、(230)面の回折ピークは、2θ=33.7°付近に現れるピークである。
得られた各ハニカム焼結体を、所定温度にて電気炉内で30分間保持した後、水中へ導入し、ひび割れが生じない最高温度を耐熱衝撃温度とした。
1a…ハニカム焼結体の端面
2…ハニカム焼結体の中心部
3…ハニカム焼結体から切り出した測定サンプル
4…ハニカム焼結体の端面近傍の領域
5…ハニカム焼結体の押出面をX線回折測定するためのサンプル
5a…押出面
6…ハニカム焼結体の8×2セルの領域
7…ハニカム焼結体の垂直面をX線回折測定するためのサンプル
7a…垂直面
Claims (2)
- チタン酸アルミニウムからなるハニカムフィルタであって、
アスペクト比(=個数平均長軸径/個数平均短軸径)が1.3以上である柱状チタン酸アルミニウムと、アスペクト比(=個数平均長軸径/個数平均短軸径)が1.3未満である粒状チタン酸アルミニウムとを、柱状チタン酸アルミニウム:粒状チタン酸アルミニウムの重量比で、95:5〜60:40の範囲内の割合となるように混合して用い、
粒状チタン酸アルミニウムの個数平均長軸径が、柱状チタン酸アルミニウムの個数平均短軸径よりも小さいことを特徴とするハニカムフィルタ。 - 押出成形により成形された成形体を焼成することによって得られるハニカムフィルタであり、押出方向に対して垂直な方向における30〜800℃の間の熱膨張係数が、2.0×10−6/℃以下であることを特徴とする請求項1に記載のハニカムフィルタ。
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2009151089A JP5445997B2 (ja) | 2009-06-25 | 2009-06-25 | ハニカムフィルタ |
PCT/JP2010/058715 WO2010150609A1 (ja) | 2009-06-25 | 2010-05-24 | ハニカムフィルタ |
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JP2009151089A JP5445997B2 (ja) | 2009-06-25 | 2009-06-25 | ハニカムフィルタ |
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Publication Number | Publication Date |
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JP2011006285A JP2011006285A (ja) | 2011-01-13 |
JP5445997B2 true JP5445997B2 (ja) | 2014-03-19 |
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JP2009151089A Expired - Fee Related JP5445997B2 (ja) | 2009-06-25 | 2009-06-25 | ハニカムフィルタ |
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JP (1) | JP5445997B2 (ja) |
WO (1) | WO2010150609A1 (ja) |
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Publication number | Priority date | Publication date | Assignee | Title |
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JP6279504B2 (ja) | 2015-03-25 | 2018-02-14 | 日本碍子株式会社 | ハニカム構造体の製造方法 |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
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JP3185960B2 (ja) * | 1993-11-11 | 2001-07-11 | トヨタ自動車株式会社 | 多孔質チタン酸アルミニウム焼結体の製造方法 |
JP3274027B2 (ja) * | 1994-09-07 | 2002-04-15 | トヨタ自動車株式会社 | チタン酸アルミニウム製ハニカム体の製造方法 |
JP3385807B2 (ja) * | 1995-07-21 | 2003-03-10 | 松下電器産業株式会社 | 排ガスフィルタ及びその製造方法 |
JP5495545B2 (ja) * | 2008-08-28 | 2014-05-21 | 京セラ株式会社 | 多孔質セラミック部材およびその製法ならびにフィルタ |
JP5274209B2 (ja) * | 2008-11-12 | 2013-08-28 | 大塚化学株式会社 | 柱状チタン酸アルミニウム及びその製造方法 |
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2009
- 2009-06-25 JP JP2009151089A patent/JP5445997B2/ja not_active Expired - Fee Related
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- 2010-05-24 WO PCT/JP2010/058715 patent/WO2010150609A1/ja active Application Filing
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Publication number | Publication date |
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JP2011006285A (ja) | 2011-01-13 |
WO2010150609A1 (ja) | 2010-12-29 |
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