JP5478072B2 - ハニカムセグメント接合体の製造方法 - Google Patents
ハニカムセグメント接合体の製造方法 Download PDFInfo
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- B28—WORKING CEMENT, CLAY, OR STONE
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- B28B11/00—Apparatus or processes for treating or working the shaped or preshaped articles
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- B28B11/243—Setting, e.g. drying, dehydrating or firing ceramic articles
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- C04B28/24—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing alkyl, ammonium or metal silicates; containing silica sols
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- C04B35/515—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
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- C04B35/71—Ceramic products containing macroscopic reinforcing agents
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- C04B35/80—Fibres, filaments, whiskers, platelets, or the like
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- C04B37/00—Joining burned ceramic articles with other burned ceramic articles or other articles by heating
- C04B37/003—Joining burned ceramic articles with other burned ceramic articles or other articles by heating by means of an interlayer consisting of a combination of materials selected from glass, or ceramic material with metals, metal oxides or metal salts
- C04B37/005—Joining burned ceramic articles with other burned ceramic articles or other articles by heating by means of an interlayer consisting of a combination of materials selected from glass, or ceramic material with metals, metal oxides or metal salts consisting of glass or ceramic material
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- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/0006—Honeycomb structures
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- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/0006—Honeycomb structures
- C04B38/0016—Honeycomb structures assembled from subunits
- C04B38/0019—Honeycomb structures assembled from subunits characterised by the material used for joining separate subunits
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
- F01N3/28—Construction of catalytic reactors
- F01N3/2803—Construction of catalytic reactors characterised by structure, by material or by manufacturing of catalyst support
- F01N3/2825—Ceramics
- F01N3/2828—Ceramic multi-channel monoliths, e.g. honeycombs
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/006—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects the gas supply or exhaust being effected through hollow spaces or cores in the materials or objects, e.g. tubes, pipes, bottles
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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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- 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
- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3418—Silicon oxide, silicic acids or oxide forming salts thereof, e.g. silica sol, fused silica, silica fume, cristobalite, quartz or flint
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- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3427—Silicates other than clay, e.g. water glass
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- C04B2235/349—Clays, e.g. bentonites, smectites such as montmorillonite, vermiculites or kaolines, e.g. illite, talc or sepiolite
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- 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
- C04B2235/5208—Fibers
- C04B2235/5216—Inorganic
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Description
ハニカムセグメントの原料として、SiC粉末及び金属Si粉末を80:20の質量割合で混合し、これに造孔材、有機バインダー、界面活性剤及び水を添加して、可塑性の坏土を作製した。この坏土を押出成形し、乾燥して隔壁の厚さが310μm、セル密度が約46.5セル/cm2(300セル/平方インチ)、断面が一辺35mmの正四角形、長さが178mmのセラミックス成形体を得た。このセラミックス成形体を、端面が市松模様状を呈するように、セルの両端面を目封じした。すなわち、隣接するセルが、互いに反対側の端部で封じられるように目封じを行った。目封じ材としては、ハニカムセグメントの原料と同様な材料を用いた。セルの両端面を目封じし、乾燥させた後、大気雰囲気中約400℃で脱脂し、その後、Ar不活性雰囲気で約1450℃で焼成して、SiC結晶粒子をSiで結合させた、多孔質構造を有するハニカムセグメントを得た。
接合材1としてSiC微粒41質量%、SiC粗粒16.5質量%、マイカ22質量%、コロイダルシリカ20質量%、ベントナイト0.5質量%、有機造孔材1.5質量%(外配)、有機バインダー0.4質量%(外配)、分散剤0.04質量%(外配)を混合したものに水をさらに混合し、ミキサーにて30分間混練を行いペースト状の接合材を得た。このとき、ペースト粘度が20〜60Pa・sとなるように水の添加量を調整した。接合材2としてSiC微粒43質量%、アルミノシリケートファイバー35質量%、コロイダルシリカ21質量%、ベントナイト1質量%、有機造孔材1.0質量%(外配)、有機バインダー0.4質量%(外配)、分散剤0.04質量%(外配)を混合したものを接合材1と同様に調整した。
ハニカムセグメントの接合面に接合材1を塗布し、順次1個ずつ加圧しながら接合する工程を繰り返し、縦3列横4列(3列×4列)に組み合わせた12個、縦4列横4列(4列×4列)に組み合わせた16個、縦6列横6列(6列×6列)に組合せた36個のハニカムセグメントからなる三種類の接合体を作製した。両端面を同時に熱風温度250℃のドライヤで5分間加熱した後、熱風乾燥器にて140℃、2時間乾燥した後、電気炉にて700℃、0.5時間熱処理して接合体(実施例1〜3)を得た。接合材2を用いて同様の方法で接合体(実施例4〜6)を得た。
接合体の端面乾燥前後に接合体全体の質量を測定して水分の飛散量を測定した。飛散量は乾燥前に接合体に含まれる水分量に対しての端面乾燥後の質量減少量を計算して百分率で表した。
接合体の長さ方向のおおよそ中心位置から、図6に示すような巾15mm厚さ10mm長さ70mmの試験片11を各接合箇所から切り出し作製して、外スパン60mm内スパン20mmで4点曲げ強度を測定した。各接合箇所の強度値のばらつきをみるため、得られた強度値すべての集合における最大値と最小値について、その比(最小値/最大値)を算出し比較した。曲げ強度比の大きさにより0.8以上を◎、0.5以上〜0.8未満を○、0.1以上〜0.5未満を△、0.1未満を×で評価した。
表1より、両端面を同時に熱風乾燥した接合体(実施例1〜6)は最大強度値に対しての最小強度の比が1に近く接合箇所による強度のばらつきが小さいのに対して、端面乾燥を行わなかった接合体(比較例1〜6)は最大強度値に対しての最小強度の比が小さく接合箇所による強度のばらつきが大きい問題があった。
接合材1を用いて接合体(実施例2,5,7、比較例2,5,9)と同様の条件で作製した縦4列横4列に組み合わせた16個のハニカムセグメントからなる接合体を熱風乾燥機にて140℃乾燥後に外周を円筒状に研削した後、その外周面をコーティング材で塗布し、その後700℃、2時間熱処理してハニカム構造体を得た。得られたハニカム構造体について急速加熱試験(バーナースポーリング試験)を試験温度900℃にて行い、試験後のハニカム構造体の割れの有無を観察し、割れの無いものを○、僅かに割れのあるものを△、割れの有るものを×として評価した。
表2より端面乾燥を行った接合体(実施例2,5,7)は○であり、良好な結果であったのに対し、端面乾燥を行わなかった接合体(比較例5)は△で、接合体(比較例2,9)は×で耐熱衝撃特性に問題があった。
Claims (1)
- 隔壁により仕切られ軸方向に貫通する複数のセルを有するハニカムセグメントを、板状粒子または繊維状粒子を含む接合材により、3列×4列以上、互いの接合面で一体的に接合し、
一体化されたハニカムセグメント接合体の両端面を同時に180℃以上の熱風によって、60秒以上、前記ハニカムセグメント接合体全体の水分量の1%以上が飛散するまで加熱して乾燥させ、前記端面における前記ハニカムセグメントを固定し、
その後、全体を加熱して乾燥するハニカムセグメント接合体の製造方法。
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PCT/JP2008/050522 WO2008088013A1 (ja) | 2007-01-18 | 2008-01-17 | ハニカムセグメント接合体の製造方法 |
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US10173933B2 (en) | 2013-05-06 | 2019-01-08 | Corning Incorporated | Rapid drying of ceramic greenwares |
JP6423160B2 (ja) | 2014-03-04 | 2018-11-14 | 日本碍子株式会社 | ハニカム構造体 |
JP7141357B2 (ja) * | 2019-03-19 | 2022-09-22 | 日本碍子株式会社 | ハニカム構造体の製造方法 |
JP7215943B2 (ja) * | 2019-03-19 | 2023-01-31 | 日本碍子株式会社 | ハニカム構造体の製造方法 |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001130970A (ja) * | 1999-08-24 | 2001-05-15 | Ibiden Co Ltd | セラミック成形体の乾燥方法 |
JP2003275521A (ja) * | 2002-03-19 | 2003-09-30 | Ngk Insulators Ltd | ハニカムフィルター |
JP2003334810A (ja) * | 2002-05-20 | 2003-11-25 | Ngk Insulators Ltd | ハニカム構造体の製造方法 |
JP2004291270A (ja) * | 2003-03-25 | 2004-10-21 | Ngk Insulators Ltd | セラミックス構造体の接合方法 |
WO2005047210A1 (ja) * | 2003-11-12 | 2005-05-26 | Ibiden Co., Ltd. | セラミック構造体、セラミック構造体の製造装置、及び、セラミック構造体の製造方法 |
JP2005154202A (ja) * | 2003-11-26 | 2005-06-16 | Ngk Insulators Ltd | ハニカム構造体及びその製造方法、並びに接合材 |
JP2006035224A (ja) * | 1998-07-28 | 2006-02-09 | Ibiden Co Ltd | セラミック構造体 |
JP2006297900A (ja) * | 2005-03-23 | 2006-11-02 | Ngk Insulators Ltd | 目封止ハニカム構造体の製造方法 |
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WO2007122707A1 (ja) * | 2006-04-19 | 2007-11-01 | Ibiden Co., Ltd. | ハニカム構造体の製造方法 |
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JP2006035224A (ja) * | 1998-07-28 | 2006-02-09 | Ibiden Co Ltd | セラミック構造体 |
JP2001130970A (ja) * | 1999-08-24 | 2001-05-15 | Ibiden Co Ltd | セラミック成形体の乾燥方法 |
JP2003275521A (ja) * | 2002-03-19 | 2003-09-30 | Ngk Insulators Ltd | ハニカムフィルター |
JP2003334810A (ja) * | 2002-05-20 | 2003-11-25 | Ngk Insulators Ltd | ハニカム構造体の製造方法 |
JP2004291270A (ja) * | 2003-03-25 | 2004-10-21 | Ngk Insulators Ltd | セラミックス構造体の接合方法 |
WO2005047210A1 (ja) * | 2003-11-12 | 2005-05-26 | Ibiden Co., Ltd. | セラミック構造体、セラミック構造体の製造装置、及び、セラミック構造体の製造方法 |
JP2005154202A (ja) * | 2003-11-26 | 2005-06-16 | Ngk Insulators Ltd | ハニカム構造体及びその製造方法、並びに接合材 |
JP2006297900A (ja) * | 2005-03-23 | 2006-11-02 | Ngk Insulators Ltd | 目封止ハニカム構造体の製造方法 |
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EP2116520B1 (en) | 2012-08-15 |
WO2008088013A1 (ja) | 2008-07-24 |
EP2116520A1 (en) | 2009-11-11 |
JPWO2008088013A1 (ja) | 2010-05-13 |
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