JP2005314218A - Method for controlling fine pore characteristics of porous structure - Google Patents

Method for controlling fine pore characteristics of porous structure Download PDF

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JP2005314218A
JP2005314218A JP2005065901A JP2005065901A JP2005314218A JP 2005314218 A JP2005314218 A JP 2005314218A JP 2005065901 A JP2005065901 A JP 2005065901A JP 2005065901 A JP2005065901 A JP 2005065901A JP 2005314218 A JP2005314218 A JP 2005314218A
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pore
porous structure
controlling
raw material
pore characteristics
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Muneyuki Iwabuchi
宗之 岩渕
Shinya Mori
慎也 森
Shuji Ueda
修司 植田
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NGK Insulators Ltd
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<P>PROBLEM TO BE SOLVED: To provide a method for controlling fine pore characteristics (porosity, average pore diameter, total pore volume) of a porous structure, capable of manufacturing a porous structure having stable fine pore characteristics, even when variation of a pore forming rate of a raw material to be used for extrusion differs with each lot. <P>SOLUTION: In the method for controlling the fine pore characteristics of the porous structure, a part of a raw material to be used for extrusion is sampled and extrusion-molded, the fine pore characteristics after firing of the obtained formed article and the characteristics of the material to be used for extrusion are grasped beforehand, and the fine pore characteristics of the formed article and the fired article are controlled. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、多孔質構造体の細孔特性の制御方法に関する。   The present invention relates to a method for controlling pore characteristics of a porous structure.

化学、電力、鉄鋼、産業廃棄物処理をはじめとする様々な分野において、公害防止等の環境対策、高温ガスからの製品回収等の用途で用いられる集塵用のフィルタとして、耐熱性、耐食性に優れるセラミックハニカム構造体が用いられている。例えば、ディーゼル機関から排出されるパティキュレートを捕集するディーゼルパティキュレートフィルタ（ＤＰＦ）等は、高温、腐食性ガス雰囲気下という過酷な条件下で使用されるものであるため、セラミックハニカム構造体が好適に用いられている。   In various fields including chemical, electric power, steel, and industrial waste treatment, as a filter for dust collection used for environmental measures such as pollution prevention, product recovery from high temperature gas, etc., it has heat resistance and corrosion resistance. Excellent ceramic honeycomb structures are used. For example, a diesel particulate filter (DPF) that collects particulates discharged from a diesel engine is used under severe conditions such as high temperature and corrosive gas atmosphere. It is preferably used.

特に、近年にあっては、集塵用フィルタの処理能力を向上させる必要から、圧力損失が低い多孔質構造体、例えば、高気孔率のセラミックハニカム構造体が求められている。このような高気孔率のセラミックハニカム構造体（多孔質ハニカム構造体）の製造方法としては、コージェライト化原料等の骨材粒子原料、水の他、バインダ（メチルセルロース等の有機バインダ）及び造孔材（グラファイト等の有機物質）等を混練し、可塑性とした可塑性原料を成形し、乾燥し、焼成する多孔質ハニカムフィルターの製造方法が開示されている（例えば、特許文献１参照）。   In particular, in recent years, a porous structure having a low pressure loss, for example, a ceramic honeycomb structure having a high porosity, has been demanded in order to improve the processing capacity of the dust collecting filter. As a method for producing such a high-porosity ceramic honeycomb structure (porous honeycomb structure), in addition to aggregate particle raw materials such as cordierite forming raw materials, water, binders (organic binders such as methylcellulose) and pores A method for manufacturing a porous honeycomb filter in which a material (organic material such as graphite) or the like is kneaded, a plastic raw material made plastic is molded, dried, and fired is disclosed (for example, see Patent Document 1).

また、下水などに含まれる細菌・廃棄物の微粒子などを除去し浄化するために、セラミックスのフィルターが用いられている。例えば、浄水場などで飲料水を浄化するための最終工程でセラミック多孔体が好適に用いられている。飲料水の浄化においても、ろ過処理量を向上させるべく高気孔率のセラミックフィルターが求められている。   Ceramic filters are used to remove and purify bacteria and waste particles contained in sewage. For example, a ceramic porous body is suitably used in the final process for purifying drinking water at a water purification plant or the like. Also in the purification of drinking water, a ceramic filter having a high porosity is required in order to improve the filtration throughput.

しかしながら、各ロットにより押出原料の造孔率のばらつきが異なり、製品である多孔質構造体の細孔特性（気孔率、平均細孔径、全細孔容積）を安定的に製造することが困難であった。
特開２００２−２１９３１９号公報 However, the variation in the porosity of the extruded raw material varies from lot to lot, and it is difficult to stably produce the pore characteristics (porosity, average pore diameter, total pore volume) of the porous structure as a product. there were.
JP 2002-219319 A

本発明は、上述した従来技術の問題点に鑑みてなされたものであり、その目的とするところは、各ロットにより押出原料の造孔率のばらつきが異なっても、安定した細孔特性を有する多孔質構造体を製造することができる多孔質構造体の細孔特性（気孔率、平均細孔径、全細孔容積）の制御方法を提供することにある。   The present invention has been made in view of the above-mentioned problems of the prior art, and the object thereof is to have stable pore characteristics even if the porosity of the extruded raw material varies depending on each lot. An object of the present invention is to provide a method for controlling the pore characteristics (porosity, average pore diameter, total pore volume) of a porous structure capable of producing a porous structure.

上述の目的を達成するため、本発明は、以下の多孔質構造体の細孔特性の制御方法を提供するものである。   In order to achieve the above object, the present invention provides the following method for controlling the pore characteristics of a porous structure.

［１］ 多孔質構造体の細孔特性の制御方法であって、多孔質構造体の押出原料の一部を採取し、押出成形し、得られた成形体の焼成後の細孔特性や前記押出原料の特性を予め把握した上で、前記成形体及びその焼成体の細孔特性を制御する多孔質構造体の細孔特性の制御方法。 [1] A method for controlling the pore characteristics of a porous structure, in which a part of an extrusion raw material of the porous structure is sampled and extruded, and the pore characteristics after firing of the obtained molded article A method for controlling the pore characteristics of a porous structure, which controls the pore characteristics of the molded body and the fired body after grasping the characteristics of the extruded raw material in advance.

［２］ 造孔材を用いる多孔質構造体の細孔特性の制御方法であって、多孔質構造体の造孔材及び押出原料の一部を採取し、押出成形し、得られた成形体の焼成後の細孔特性や前記造孔材及び前記押出原料の特性を予め把握した上で、前記押出原料に添加する前記造孔材の添加量を調整し、前記成形体及びその焼成体の細孔特性を制御する多孔質構造体の細孔特性の制御方法。 [2] A method for controlling the pore characteristics of a porous structure using a pore former, wherein a part of the pore former of the porous structure and an extrusion raw material are sampled, extruded, and obtained. After grasping in advance the pore characteristics after firing and the properties of the pore former and the extrusion raw material, the amount of the pore former added to the extrusion raw material is adjusted, and the molded body and the fired body A method for controlling pore characteristics of a porous structure for controlling pore characteristics.

［３］ 押出原料に、添加する水の量を調整する［１］又は［２］に記載の多孔質構造体の細孔特性の制御方法。 [3] The method for controlling the pore characteristics of the porous structure according to [1] or [2], wherein the amount of water added to the extrusion raw material is adjusted.

［４］ 造孔材が、可燃物である［２］又は［３］に記載の多孔質構造体の細孔特性の制御方法。 [4] The method for controlling the pore characteristics of the porous structure according to [2] or [3], wherein the pore former is a combustible material.

［５］ 造孔材の一部又は全てが、樹脂である［２］〜［４］のいずれかに記載の多孔質構造体の細孔特性の制御方法。 [5] The method for controlling the pore characteristics of the porous structure according to any one of [2] to [4], wherein part or all of the pore former is a resin.

［６］ 樹脂が、気体及び／又は液体を内包する樹脂である［５］に記載の多孔質構造体の細孔特性の制御方法。 [6] The method for controlling the pore characteristics of the porous structure according to [5], wherein the resin is a resin containing a gas and / or a liquid.

［７］ 前記気体及び／又は液体を内包する樹脂が、発泡樹脂である［６］に記載の多孔質構造体の細孔特性の制御方法。 [7] The method for controlling the pore characteristics of the porous structure according to [6], wherein the resin containing the gas and / or liquid is a foamed resin.

［８］ 焼成体が、多孔質ハニカム構造体である［１］〜［７］のいずれかに記載の多孔質構造体の細孔特性の制御方法。 [8] The method for controlling the pore characteristics of the porous structure according to any one of [1] to [7], wherein the fired body is a porous honeycomb structure.

［９］ 押出原料の一部を採取し押出成形が、押出原料の各ロットの変更毎に行われる［１］〜［８］のいずれかに記載の多孔質構造体の細孔特性の制御方法。 [9] The method for controlling the pore characteristics of the porous structure according to any one of [1] to [8], in which a part of the extruded raw material is collected and extrusion molding is performed for each change of each lot of the extruded raw material. .

本発明の多孔質構造体の細孔特性の制御方法は、各ロットにより押出原料の造孔率の特性が変動しても、安定した細孔特性を有する多孔質構造体を製造することができる。   The method for controlling the pore characteristics of the porous structure of the present invention can produce a porous structure having stable pore characteristics even if the porosity characteristics of the extrusion raw material vary depending on each lot. .

以下、本発明の多孔質構造体の細孔特性の制御方法の実施の形態について詳細に説明するが、本発明は、これに限定されて解釈されるものではなく、本発明の範囲を逸脱しない限りにおいて、当業者の知識に基づいて、種々の変更、修正、改良を加え得るものである。   Hereinafter, embodiments of the method for controlling the pore characteristics of the porous structure of the present invention will be described in detail. However, the present invention is not construed as being limited thereto, and does not depart from the scope of the present invention. Insofar as various changes, modifications and improvements can be made based on the knowledge of those skilled in the art.

本発明の多孔質構造体の細孔特性の制御方法は、多孔質構造体の押出原料の一部を採取し、押出成形し、得られた成形体の焼成後の細孔特性や押出原料の特性を予め把握した上で、成形体及びその焼成体の細孔特性を制御することにある。   The method for controlling the pore characteristics of the porous structure according to the present invention is to extract a part of the extruded raw material of the porous structure, extrude, and obtain the pore characteristics and the extruded raw material after firing of the obtained molded body. It is to control the pore characteristics of the molded body and the fired body after grasping the characteristics in advance.

また、本発明の多孔質構造体の細孔特性の制御方法は、造孔材を用いる多孔質構造体の細孔特性の制御方法であって、多孔質構造体の造孔材及び押出原料の一部を採取し、押出成形し、得られた成形体の焼成後の細孔特性や押出原料のばらつきを予め把握した上で、押出原料に添加する造孔材の添加量を調整することにある。   Further, the method for controlling the pore characteristics of the porous structure according to the present invention is a method for controlling the pore characteristics of a porous structure using a pore-forming material. Taking a part, extruding, and adjusting the amount of pore forming material added to the extruded material after grasping in advance the pore characteristics after firing of the molded body and variations in the extruded material is there.

これにより、本発明では、各ロットにより押出原料の造孔率のばらつきが異なっても、安定した細孔特性を有する多孔質構造体を製造することができる。ここで、ロットとは、成形前原料調合毎、成形日毎、乾燥日毎、焼成毎又は、それらの数調合分、数日間分又は、所定個数例えば数個から数万個である。   Thus, in the present invention, a porous structure having stable pore characteristics can be produced even if the variation in the pore forming rate of the extruded raw material varies from lot to lot. Here, the lot is a raw material preparation before molding, a molding date, a drying date, a firing, or several preparations, several days, or a predetermined number, for example, several to tens of thousands.

このとき、本発明で用いる造孔材は、可燃物であることが好ましい。これは、可燃物が焼失し気孔を形成するからである。   At this time, the pore former used in the present invention is preferably a combustible material. This is because combustible materials burn out and form pores.

上記のように可燃性を有する造孔材は、例えば、可燃性を有するグラファイト、小麦粉、澱粉、フェノール樹脂、ポリメタクリル酸メチル、ポリエチレン等の樹脂を挙げることができる。   Examples of the flammable pore former as described above include flammable resins such as graphite, wheat flour, starch, phenol resin, polymethyl methacrylate, and polyethylene.

このとき、本発明で用いる樹脂は、気体及び／又は液体を内包する樹脂であることが好ましい。   At this time, the resin used in the present invention is preferably a resin containing a gas and / or a liquid.

ここで、気体及び／又は液体を内包する樹脂は、特に限定されないが、ポリエチレンテレフタレート気体を内包する発泡樹脂やアクリル系、メタクリレート系、カルボン酸系などのマイクロカプセル等の発泡済みの発泡樹脂であることが好ましい。発泡済みの発泡樹脂は、中空であることから少量で高気孔率のハニカムフィルターを得ることができ、安価な原料費で高気孔率を得ることができる。   Here, the resin containing the gas and / or liquid is not particularly limited, but is a foamed resin containing a polyethylene terephthalate gas or a foamed foamed resin such as an acrylic, methacrylate, or carboxylic acid microcapsule. It is preferable. Since the foamed foamed resin is hollow, a small amount of a high porosity honeycomb filter can be obtained, and a high porosity can be obtained at a low raw material cost.

尚、本発明で用いる造孔材は、上記それぞれの材料を適宜配合して使用してもよい。   The pore former used in the present invention may be used by appropriately blending the above materials.

また、本発明では、混練機の回転条件、土練機の真空、押出速度、土温度、添加する水の量を押出成形時に調整を行うことで、製造時の条件を予測することもでき、細孔特性をより制御し、細孔特性を安定することができる。   Further, in the present invention, the conditions at the time of production can also be predicted by adjusting the rotation conditions of the kneader, the vacuum of the kneader, the extrusion speed, the soil temperature, and the amount of water to be added during extrusion molding. It is possible to further control the pore characteristics and stabilize the pore characteristics.

本発明で用いる造孔材は、押出材料中の標準原料１００重量部に対して、カーボンなど可燃物の造孔材の場合、２．０〜２０．０重量部（より好ましくは、３．０〜１５．０重量部）含有させることが好ましく、また気体を内包させた樹脂の場合、１．０〜１０．０重量部（より好ましくは、１．０〜５．０重量部）含有させることが好ましい。これは、造孔材の添加量が少なければ、所定の気孔率が得られずフィルター性能が低下し、造孔材を多量に添加すると、得られるフィルターの気孔率が極めて大きくなる反面、強度が低下して、取扱いの際に損傷し易くなるからである。   The pore former used in the present invention is 2.0 to 20.0 parts by weight (more preferably, 3.0 parts by weight in the case of a pore former made of combustible material such as carbon with respect to 100 parts by weight of the standard raw material in the extruded material. ~ 15.0 parts by weight) is preferably contained, and in the case of a resin containing a gas, 1.0 to 10.0 parts by weight (more preferably 1.0 to 5.0 parts by weight) is contained. Is preferred. This is because if the amount of the pore-forming material added is small, the predetermined porosity cannot be obtained and the filter performance deteriorates.If a large amount of the pore-forming material is added, the porosity of the resulting filter becomes extremely large, but the strength is low. This is because it is lowered and easily damaged during handling.

このとき、本発明では、小規模押出成形が、押出原料の各ロットの変更毎に行われることが、安定した細孔特性を有する多孔質構造体を製造することができるため好ましい。   At this time, in the present invention, it is preferable that the small-scale extrusion is performed for each change of each lot of the extrusion raw material because a porous structure having stable pore characteristics can be manufactured.

尚、本発明で得られる成形体は、実際の製品に近似した形状であることが、近似した評価を得ることができるため好ましい。   In addition, since the molded object obtained by this invention is a shape approximated to an actual product, since approximate evaluation can be obtained, it is preferable.

次に、本発明の多孔質構造体の細孔特性の制御方法の適用例について説明する。多孔質構造体の押出材料を最適化するため、原材料受入検査（先行小規模試験）として、細孔特性を設定するに際し、比較用として、造孔材の添加量が一定及び造孔材を含む標準原料を予め設定しその原料を用いた標準試験（試験１）と標準試験との比較による造孔材の添加量を標準試験と比較し添加量を設定するための造孔能力評価（試験２）を行う。   Next, an application example of the method for controlling the pore characteristics of the porous structure of the present invention will be described. In order to optimize the extruded material of the porous structure, the raw material acceptance inspection (advanced small scale test), when setting the pore characteristics, for comparison, the amount of pore former added is constant and includes pore former Establishing a standard raw material in advance and comparing the standard test (test 1) using the raw material with the standard test, the amount of pore forming material added is compared with the standard test, and the pore forming capacity evaluation for setting the additive amount (test 2) )I do.

（試験１）
基準調合表に基づいて調合された標準原料（例えば、反応焼結によるコージェライトが得られるような主原料）に、標準原料に予め造孔能力は判明している標準の造孔材を添加した後、押出成形し、焼成後、細孔特性を評価する。 (Test 1)
A standard pore former whose pore-forming ability is already known is added to a standard raw material (for example, a main raw material from which cordierite can be obtained by reaction sintering) prepared based on the standard recipe. Then, after extrusion molding and firing, the pore characteristics are evaluated.

（試験２）
生産に使用予定の反応焼結によるコージェライトが得られるような主原料と造孔材を用いて（試験１）と同様に押出成形し、焼成後、細孔特性の評価を行い、（試験１）との比較を行う。 (Test 2)
Extrusion molding was performed in the same manner as in (Test 1) using the main raw material and pore former that can obtain cordierite by reaction sintering scheduled to be used for production, and after firing, the pore characteristics were evaluated (Test 1). ).

得られた（試験１）及び（試験２）の結果を比較し、必要とする細孔特性（気孔率、平均細孔径、全細孔容積）や押出原料のばらつきを把握し、押出原料に添加する造孔材及び添加する水の量を決定する。以上の原材料受入検査（先行小規模試験）を経て得られた押出原料を用いることにより、安定した細孔特性を有する多孔質構造体を製造することができる。   Comparing the results of (Test 1) and (Test 2) obtained, grasping necessary pore characteristics (porosity, average pore diameter, total pore volume) and variation of extruded raw material, and adding to extruded raw material Determine the amount of pore former to be added and the amount of water to be added. By using the extruded raw material obtained through the raw material acceptance inspection (advanced small scale test), a porous structure having stable pore characteristics can be produced.

以下、本発明を実施例に基づいて、細孔特性の気孔率（内気孔率）に関して、詳細に説明するが、本発明はこれらの実施例に限定されるものではない。   Hereinafter, the present invention will be described in detail with respect to the porosity (internal porosity) of the pore characteristics based on examples, but the present invention is not limited to these examples.

（実施例）
気孔率を制御する前に予め、（試験１）で造孔材の添加量と、気孔率の変化量の見極めを行った。図１にカーボンの添加量を主原料１００部に対して１０部添加し、発泡樹脂添加量を変動させた場合の値を示す。 (Example)
Prior to controlling the porosity, the amount of pore former added and the amount of change in porosity were determined in advance in (Test 1). FIG. 1 shows the value when adding 10 parts of carbon with respect to 100 parts of the main raw material and changing the amount of foamed resin added.

（試験１）
標準原料として、反応焼結によるコージェライトが得られるような主原料に、標準造孔材としてカーボンを主原料１００部に対して１０部とアクリル系の発泡樹脂を３部、主原料１００部に対して成形バインダーとしてメチルセルロースを５部、更に水を主原料１００部に対して２５部加えて、小型の混練機、土練機、プランジャー成形にてφ７０ｍｍ、長さ１００ｍｍの１７ミル、１００セル形状の多孔質ハニカム構造体の成形を行い、乾燥の後、１２００℃〜１５００℃で焼成し、水銀ポロシメーターにて気孔率を測定した。得られた気孔率は５５％であった。 (Test 1)
As a standard raw material, the main raw material that can obtain cordierite by reaction sintering, as a standard pore former, 10 parts of carbon for 100 parts of the main raw material, 3 parts of acrylic foamed resin, 100 parts of the main raw material On the other hand, 5 parts of methylcellulose as a molding binder and 25 parts of water with respect to 100 parts of the main raw material are added. A porous honeycomb structure having a shape was formed, dried, fired at 1200 ° C. to 1500 ° C., and the porosity was measured with a mercury porosimeter. The porosity obtained was 55%.

（試験２）
生産に使用予定の反応焼結によるコージェライトが得られるような主原料と造孔材として使用予定のロットのカーボンと発泡樹脂を（試験１）と同様の添加量、条件で成形焼成し、その結果、気孔率５７．５％を得た。 (Test 2)
The main raw material that can produce cordierite by reaction sintering scheduled to be used for production, and the carbon and foamed resin of the lot scheduled to be used as a pore former are molded and fired in the same amount and conditions as in (Test 1). As a result, a porosity of 57.5% was obtained.

図１より、発泡樹脂の添加量を０．５％減量することで、標準（試験１）と同様の気孔率を得る指針が導き出せる。   From FIG. 1, a guideline for obtaining the same porosity as the standard (test 1) can be derived by reducing the amount of the foamed resin added by 0.5%.

（試験１）と同様の調合量で、発泡樹脂の添加量を２．５部として生産を行った結果、同様の気孔率５５％を得ることができた。   As a result of production with the same blending amount as in (Test 1) and the addition amount of the foamed resin being 2.5 parts, the same porosity of 55% could be obtained.

図１に示す添加量の指針は、発泡樹脂の添加量にとどまらず、カーボン、水添加量、成形条件などで、気孔率の指針を作成し、標準原料を用いた（試験１）と比較しながら（試験２）を行うことで、気孔率（細孔特性）の制御を行うことができた。   The guideline for the addition amount shown in FIG. 1 is not limited to the addition amount of the foamed resin, but a guideline for porosity is created based on carbon, water addition amount, molding conditions, etc. However, the porosity (pore characteristics) could be controlled by performing (Test 2).

本発明の多孔質構造体の細孔特性の制御方法は、各ロットにより押出原料の造孔率の特性が変動しても、安定した細孔特性を有する多孔質構造体を製造することができる。   The method for controlling the pore characteristics of the porous structure of the present invention can produce a porous structure having stable pore characteristics even if the porosity characteristics of the extrusion raw material vary depending on each lot. .

実施例における多孔質ハニカム構造体の気孔率（細孔特性）の制御方法を示すグラフである。It is a graph which shows the control method of the porosity (pore characteristic) of the porous honeycomb structure in an Example.

Claims (9)

多孔質構造体の細孔特性の制御方法であって、多孔質構造体の押出原料の一部を採取し、押出成形し、得られた成形体の焼成後の細孔特性や前記押出原料の特性を予め把握した上で、前記成形体及びその焼成体の細孔特性を制御する多孔質構造体の細孔特性の制御方法。   A method for controlling the pore characteristics of a porous structure, wherein a part of the extruded raw material of the porous structure is sampled and extruded, and the pore characteristics after firing of the obtained molded article and the extruded raw material A method for controlling the pore characteristics of a porous structure, wherein the pore characteristics of the molded body and the fired body are controlled after grasping the characteristics in advance. 造孔材を用いる多孔質構造体の細孔特性の制御方法であって、多孔質構造体の造孔材及び押出原料の一部を採取し、押出成形し、得られた成形体の焼成後の細孔特性や前記造孔材及び前記押出原料の特性を予め把握した上で、前記押出原料に添加する前記造孔材の添加量を調整し、前記成形体及びその焼成体の細孔特性を制御する多孔質構造体の細孔特性の制御方法。   A method for controlling the pore characteristics of a porous structure using a pore former, wherein a part of the pore former of the porous structure and an extrusion raw material are sampled and extruded, and the resulting molded article is fired The pore characteristics of the molded body and the fired body are adjusted by adjusting the amount of the pore former to be added to the extrusion raw material after grasping in advance the pore characteristics and the characteristics of the pore former and the extrusion raw material. For controlling the pore characteristics of a porous structure for controlling the temperature. 前記押出原料に、添加する水の量を調整する請求項１又は２に記載の多孔質構造体の細孔特性の制御方法。   The method for controlling the pore characteristics of a porous structure according to claim 1 or 2, wherein the amount of water added to the extrusion raw material is adjusted. 前記造孔材が、可燃物である請求項２又は３に記載の多孔質構造体の細孔特性の制御方法。   The method for controlling the pore characteristics of a porous structure according to claim 2 or 3, wherein the pore former is a combustible material. 前記造孔材の一部又は全てが、樹脂である請求項２〜４のいずれか１項に記載の多孔質構造体の細孔特性の制御方法。   The method for controlling the pore characteristics of the porous structure according to any one of claims 2 to 4, wherein a part or all of the pore former is a resin. 前記樹脂が、気体及び／又は液体を内包する樹脂である請求項５に記載の多孔質構造体の細孔特性の制御方法。 The method for controlling pore characteristics of a porous structure according to claim 5, wherein the resin is a resin containing a gas and / or a liquid. 前記気体及び／又は液体を内包する樹脂が、発泡樹脂である請求項６に記載の多孔質構造体の細孔特性の制御方法。   The method for controlling pore characteristics of a porous structure according to claim 6, wherein the resin containing the gas and / or liquid is a foamed resin. 前記焼成体が、多孔質ハニカム構造体である請求項１〜７のいずれか１項に記載の多孔質構造体の細孔特性の制御方法。   The method for controlling pore characteristics of a porous structure according to any one of claims 1 to 7, wherein the fired body is a porous honeycomb structure. 前記押出原料の一部を採取し押出成形が、押出原料の各ロットの変更毎に行われる請求項１〜８のいずれか１項に記載の多孔質構造体の細孔特性の制御方法。   The method for controlling the pore characteristics of the porous structure according to any one of claims 1 to 8, wherein a part of the extruded raw material is collected and extrusion molding is performed for each change of each lot of the extruded raw material.
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008041548A1 (en) 2006-09-25 2008-04-10 Hitachi Metals, Ltd. Method for producing ceramic honeycomb structure
JP2011514876A (en) * 2008-02-29 2011-05-12 コーニング インコーポレイテッド Method for reducing shrinkage of porous ceramic honeycombs

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008041548A1 (en) 2006-09-25 2008-04-10 Hitachi Metals, Ltd. Method for producing ceramic honeycomb structure
JP2011514876A (en) * 2008-02-29 2011-05-12 コーニング インコーポレイテッド Method for reducing shrinkage of porous ceramic honeycombs

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