JP4850314B2 - セラミクスハニカム焼成体の製造方法 - Google Patents
セラミクスハニカム焼成体の製造方法 Download PDFInfo
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- JP4850314B2 JP4850314B2 JP2011107396A JP2011107396A JP4850314B2 JP 4850314 B2 JP4850314 B2 JP 4850314B2 JP 2011107396 A JP2011107396 A JP 2011107396A JP 2011107396 A JP2011107396 A JP 2011107396A JP 4850314 B2 JP4850314 B2 JP 4850314B2
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- ZQPPMHVWECSIRJ-KTKRTIGZSA-N oleic acid Chemical compound CCCCCCCC\C=C/CCCCCCCC(O)=O ZQPPMHVWECSIRJ-KTKRTIGZSA-N 0.000 description 1
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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
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/64—Burning or sintering processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/50—Catalysts, in general, characterised by their form or physical properties characterised by their shape or configuration
- B01J35/56—Foraminous structures having flow-through passages or channels, e.g. grids or three-dimensional monoliths
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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
- C04B35/46—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
-
- 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
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
- F01N3/022—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters characterised by specially adapted filtering structure, e.g. honeycomb, mesh or fibrous
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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
- C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
- C04B2235/9607—Thermal properties, e.g. thermal expansion coefficient
- C04B2235/9623—Ceramic setters properties
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- Combustion & Propulsion (AREA)
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- General Engineering & Computer Science (AREA)
- Filtering Materials (AREA)
- Furnace Charging Or Discharging (AREA)
- Porous Artificial Stone Or Porous Ceramic Products (AREA)
- Compositions Of Oxide Ceramics (AREA)
- Devices For Post-Treatments, Processing, Supply, Discharge, And Other Processes (AREA)
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Description
また、焼成台及びグリーン成形体における複数の流路は、端面側から見て各々正三角形配置又は正六角形配置されており、載置する工程では、基準位置に対して、グリーン成形体を、グリーン成形体の鉛直軸の周りに、10°〜50°+n・60°回転した状態で前記焼成台に載置することも好ましい。ここで、nは整数であり、例えば、n=0,1,2,3,4,5である。
本実施形態に係るグリーン成形体1及び焼成台5は、図1に示すように、それぞれ、上下方向に延びる多数の流路4を形成する隔壁3を有した円柱体である。隔壁3の端面が形成するパターンは、グリーン成形体1と焼成台5とで互いに同一である。流路4の断面形状は略正方形である。これらの複数の流路4は、焼成台5及びグリーン成形体1において、端面側(Z方向)から見て、正方形配置、すなわち、流路4の中心が、正方形の頂点にそれぞれ位置するように配置されている。流路4の断面の正方形のサイズは、例えば、一辺0.8〜2.5mmとすることができる。隔壁の厚みは、例えば、0.15〜0.76mmとすることができる。
まず、無機化合物源粉末と、有機バインダと、溶媒と、必要に応じて添加される添加物を用意する。そして、これらを混練機等により混合して原料混合物を得、得られた原料混合物を隔壁の断面形状に対応する出口開口を有する押出機から押し出し、乾燥をし、所望の長さに切ることにより、グリーン成形体1、及び、焼成台5を得ることができる。同じ押出機から製造することにより、グリーン成形体1及び焼成台5は、同じ断面構造の隔壁3を有することができ、同一の組成とすることができる。その後、必要に応じて、流路4の端部を封口することができる。
続いて、グリーン成形体1及び焼成台5を焼成する。グリーン成形体1を仮焼(脱脂)および焼成することにより、流路を有する多孔質のセラミクスハニカム焼成体を得ることができる。
また引き剥がす際にセラミクスハニカム焼成体に損傷を与えたり、セラミクスハニカム構造体に、焼成台の一部が付着したままになるという不良を抑制できる。
また、各流路の断面形状も、正方形には限定されず、矩形、円形、楕円形、又は、3角形、6角形、8角形等の種々の多角形(正多角形でない多角形を含む)等にすることができ、これらの流路には、他と径の異なるもの、他と断面形状の異なるものが混在してもよい。
さらに、流路の配置も、断面において流路の重心(流路断面が円や正多角形であれば中心)が正方形の頂点に配置される正方形配置に限定されず、断面において流路の重心(流路断面が円や正多角形であれば中心)が正三角形の頂点に配置される正三角形配置、断面において流路の重心(流路断面が円や正多角形であれば中心)が正六角形の頂点に配置される正六角形配置、千鳥配置等にすることができる。
このようにして、隔壁3の端面のパターンに応じて、グリーン成形体の隔壁の端面の一部のみが焼成台の隔壁の上側端面と接触するようなθは容易に設定できる。
Claims (4)
- 焼成台にグリーン成形体を載置する工程と、
前記焼成台及びグリーン成形体を焼成する工程と、を備え、
前記焼成台及びグリーン成形体は、それぞれ、セラミクス原料を含みかつ複数の流路を形成する隔壁を有する柱体であり、前記二つの隔壁の端面のパターンは前記流路の延びる方向から見て互いに同一であり、
前記載置する工程では、前記グリーン成形体の隔壁の一方の端面の一部のみが、水平に載置された前記焼成台の隔壁の上側端面と接触するように、前記グリーン成形体の隔壁の一方の端面の全部が前記焼成台の隔壁の上側端面と接触する状態を基準位置として、前記グリーン成形体を前記グリーン成形体の鉛直軸の周りに所定角度回転した状態で前記焼成台に載置し、
前記焼成台及びグリーン成形体における前記複数の流路は、前記端面側から見て各々正方形配置されており、
前記載置する工程では、前記基準位置に対して、前記グリーン成形体を、前記グリーン成形体の鉛直軸の周りに、15°〜75°+n・90°回転した状態で前記焼成台に載置するセラミクスハニカム焼成体の製造方法。
ここで、nは整数である。 - 焼成台にグリーン成形体を載置する工程と、
前記焼成台及びグリーン成形体を焼成する工程と、を備え、
前記焼成台及びグリーン成形体は、それぞれ、セラミクス原料を含みかつ複数の流路を形成する隔壁を有する柱体であり、前記二つの隔壁の端面のパターンは前記流路の延びる方向から見て互いに同一であり、
前記載置する工程では、前記グリーン成形体の隔壁の一方の端面の一部のみが、水平に載置された前記焼成台の隔壁の上側端面と接触するように、前記グリーン成形体の隔壁の一方の端面の全部が前記焼成台の隔壁の上側端面と接触する状態を基準位置として、前記グリーン成形体を前記グリーン成形体の鉛直軸の周りに所定角度回転した状態で前記焼成台に載置し、
前記焼成台及びグリーン成形体における前記複数の流路は、前記端面側から見て各々正三角形配置又は正六角形配置されており、
前記載置する工程では、前記基準位置に対して、前記グリーン成形体を、前記グリーン成形体の鉛直軸の周りに、10°〜50°+n・60°回転した状態で前記焼成台に載置するセラミクスハニカム焼成体の製造方法。
ここで、nは整数である。 - 前記グリーン成形体の複数の流路のうちの一部の一方の開口部が封口され、前記グリーン成形体の複数の流路のうちの残部の他方の開口部が封口された請求項1又は2に記載の方法。
- 前記焼成台及びグリーン成形体のセラミクス原料は、アルミニウム源粉末およびチタニウム源粉末を含む請求項1〜3のいずれか一項記載の方法。
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