WO2017033774A1 - Procédé de fabrication d'un filtre en nid d'abeilles - Google Patents

Procédé de fabrication d'un filtre en nid d'abeilles Download PDF

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Publication number
WO2017033774A1
WO2017033774A1 PCT/JP2016/073771 JP2016073771W WO2017033774A1 WO 2017033774 A1 WO2017033774 A1 WO 2017033774A1 JP 2016073771 W JP2016073771 W JP 2016073771W WO 2017033774 A1 WO2017033774 A1 WO 2017033774A1
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WO
WIPO (PCT)
Prior art keywords
end surface
molded body
green molded
surface member
honeycomb filter
Prior art date
Application number
PCT/JP2016/073771
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English (en)
Japanese (ja)
Inventor
拓也 門脇
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住友化学株式会社
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Filing date
Publication date
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Publication of WO2017033774A1 publication Critical patent/WO2017033774A1/fr

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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

Definitions

  • One embodiment of the present invention relates to a method for manufacturing a honeycomb filter.
  • a method for manufacturing a honeycomb filter used for a diesel particulate filter or the like is known.
  • a green (unfired) molded body containing a ceramic raw material is manufactured by extrusion molding or the like.
  • the green molded body is a honeycomb columnar body in which a plurality of through holes parallel to each other are formed and partition walls separating the plurality of through holes.
  • a honeycomb filter is manufactured by firing the green molded body.
  • the honeycomb filter used for the diesel particulate filter or the like is sealed by the sealing portion containing the ceramic raw material at the end of the through hole on either one of the two end surfaces of the columnar body of the green molded body. It functions as a filter.
  • the end of the through hole of the green molded body is sealed by the sealing part before the green molded body is fired. There are many. However, if the green molded body is fired with the end of the through hole of the green molded body being sealed, a temperature gradient due to a temperature difference is likely to occur in each part of the green molded body, and the post-baking due to stress concentration due to the temperature gradient. Cracks may occur in the honeycomb filter.
  • One aspect of the present invention has been made in view of the above problems, and an object thereof is to provide a method for manufacturing a honeycomb filter capable of preventing cracking of the honeycomb filter during firing.
  • One embodiment of the present invention includes a honeycomb-shaped columnar body that includes a plurality of through-holes parallel to each other and includes partition walls that separate the plurality of through-holes, and a sealing portion that seals one end of the through-hole. Some of the through holes are sealed at the first end surface of the columnar body orthogonal to the through holes at the first end surface and the second end surface, and are opened at the second end surface. The remaining through-holes are sealed with a sealing portion at the second end surface and open at the first end surface, and the columnar body and the sealing portion face the first end surface downward with respect to the green molded body containing the ceramic raw material.
  • the upper end surface member is placed on the second end surface by placing the upper end surface member containing the ceramic raw material on the second end surface with the second end surface facing upward, and the upper end surface member placing step.
  • the green molded body placed is fired to form honeycomb honeycomb.
  • the upper end surface member placing step the upper end surface member containing the ceramic raw material is placed on the second end surface, so that the location where stress concentration due to a temperature gradient that causes cracks during firing occurs is increased. Transition to the end face member. Thereby, cracking of the honeycomb filter can be prevented during firing.
  • the end material of the green molded body manufactured by extruding the ceramic raw material may be placed on the second end face as the upper end face member.
  • the end material of the green molded body manufactured by extruding the ceramic raw material is placed on the second end surface as the upper end surface member.
  • the green molded body and the upper end surface member are made of the same material and the same partition wall structure, the temperature characteristics of the green molded body and the upper end surface member are also the same. The transition to the end face member can be facilitated reliably.
  • cost reduction can be aimed at compared with the case where an upper end surface member is produced separately.
  • the upper end surface member whose length from the uppermost portion of the upper end surface member mounted on the second end surface to the second end surface is 0.05 times or more the thickness of the second end surface May be placed on the second end face.
  • the length from the uppermost portion of the upper end surface member mounted on the second end surface to the second end surface (that is, the thickness of the upper end surface member) is the second end surface.
  • An upper end surface member having a thickness of 0.05 times or more is placed on the second end surface. For this reason, the location where the stress concentration that causes cracks during firing can be reliably transferred to the upper end surface member.
  • the method of one embodiment of the present invention can be applied to a green molded body that becomes a honeycomb filter having a porosity of 50% or more after the firing step.
  • the green molded body becomes a honeycomb filter having a porosity of 50% or more after the firing step, and is easily cracked due to stress concentration. Therefore, when the manufacturing method of the honeycomb filter of one embodiment of the present invention is applied. The effect of preventing cracks is remarkable.
  • the method of one embodiment of the present invention can be applied to a green molded body that becomes a honeycomb filter having a bending strength of 1.5 MPa or less after the firing step.
  • the green molded body becomes a honeycomb filter having a bending strength of 1.5 MPa or less after the firing step, and cracking is likely to occur due to stress concentration. Therefore, the method for manufacturing a honeycomb filter according to one embodiment of the present invention is applied. When it does, the effect which prevents a crack becomes remarkable.
  • the method of one embodiment of the present invention can be applied to a green molded body having an inflection point in a temperature range where the shrinkage curve indicating the shrinkage rate of the green molded body with respect to temperature is 900 ° C. or higher.
  • the green molded body has an inflection point in a temperature range of 900 ° C. or higher in the shrinkage curve indicating the shrinkage rate of the green molded body with respect to temperature in the firing step, and stress concentration due to a temperature gradient is likely to occur. Since cracking is likely to occur, the effect of preventing cracking becomes significant when the method for manufacturing a honeycomb filter of one embodiment of the present invention is applied.
  • cracking of the honeycomb filter can be prevented during firing.
  • (A) is a perspective view of the green molded object which concerns on one Embodiment of this invention
  • (b) is a front view of the upper end surface of the columnar body of (a). It is a figure which shows the outline of the cross section parallel to the extension direction of the through-hole of the green molded object of Fig.1 (a).
  • the green molded object of FIG. 2 it is a figure which shows the state which supported the lower end surface with the base, and mounted the upper end surface member on the upper end surface.
  • the green molded object 70 which concerns on this embodiment has the shape of a columnar body as a whole, and has the shape of a cylindrical body in more detail.
  • the green molded body 70 has a lower end surface (first end surface) 71a, an upper end surface (second end surface) 71b, and a side surface 71c of the cylindrical body.
  • the green molded body 70 is formed with a plurality of through holes 70h parallel to each other.
  • the lower end surface 71a and the upper end surface 71b are orthogonal to the through hole 70h.
  • the green molded body 70 is a honeycomb columnar body having partition walls 70W separating the plurality of through holes 70h.
  • the through holes 70h separated from each other by the partition walls 70W have a regular hexagonal shape as viewed from the lower end surface 71a and the upper end surface 71b.
  • the green molded body 70 includes a sealing portion 72 that seals one end of the through hole 70h.
  • the green molded body 70 is an unfired molded body that contains a ceramic raw material and becomes porous ceramic when fired later.
  • the length of the green molded body 70 in the direction in which the through hole 70h extends is not particularly limited, but may be, for example, 40 to 350 mm.
  • the thickness (diameter) of the lower end surface 71a and the upper end surface 71b of the green molded body 70 is not particularly limited, but may be, for example, 10 to 320 mm.
  • Each of the through holes 70 h is separated by a partition wall 70 ⁇ / b> W that extends parallel to the central axis of the green molded body 70.
  • the thickness of the partition wall 70W can be 0.8 mm or less or 0.5 mm or less, and can be 0.1 mm or more or 0.2 mm or more.
  • some of the through holes 70h of the plurality of through holes 70h are sealed by the sealing portion 72 at the lower end surface 71a, and at the upper end surface 71b. is open.
  • the remaining through hole 70h of the plurality of through holes 70h is sealed by the sealing portion 72 at the upper end surface 71b and opened at the lower end surface 71a.
  • the six through holes 70 h around one through hole 70 h are open on the upper end surface 71 b side, and each of the six open through holes 70 h has a periphery.
  • One enclosed through hole 70 h is sealed by a sealing portion 72.
  • each of the six through holes 70 h surrounding the open one through hole 70 h is sealed with a sealing portion 72.
  • the upper end surface 71b is the inlet side of the gas flow path
  • the lower end surface 71a is the outlet side of the gas flow path.
  • the green molded body 70 is a green body (unfired body) that becomes porous ceramics when fired later, and includes a ceramic raw material.
  • the ceramic is not particularly limited, and examples thereof include alumina, silica, mullite, cordierite, glass, oxides such as aluminum titanate, silicon carbide, silicon nitride, and metal.
  • the aluminum titanate can further contain magnesium and / or silicon.
  • the green molded body 70 may include an inorganic compound source powder that is a ceramic raw material, an organic binder such as methylcellulose, and an additive that is added as necessary.
  • the ceramic raw material includes an inorganic compound source powder containing the elements constituting the ceramic.
  • the inorganic compound source powder includes an aluminum source powder such as ⁇ -alumina powder and a titanium source powder such as anatase type or rutile type titania powder, and / or aluminum titanate. It contains powder, and may further contain magnesium source powder such as magnesia powder and magnesia spinel powder, and / or silicon source powder such as silicon oxide powder and glass frit.
  • the inorganic compound source powder may contain magnesia spinel powder, and the amount thereof is 100% of aluminum atoms in the fired honeycomb filter.
  • the amount of magnesium atoms derived from magnesia spinel may be 10 to 20 parts by mass with respect to parts by mass, and the proportion of magnesia spinel in the magnesium source is 80% by mass or more. May be.
  • organic binder examples include celluloses such as methylcellulose, carboxymethylcellulose, hydroxyalkylmethylcellulose, and sodium carboxymethylcellulose; alcohols such as polyvinyl alcohol; and lignin sulfonate.
  • additives include a pore-forming agent, a lubricant, a plasticizer, a dispersant, and a solvent.
  • carbon materials such as graphite; resins such as polyethylene, polypropylene, polymethyl methacrylate; plant materials such as starch (potato starch), nut shells, walnut shells, corn; ice; and dry ice Is mentioned.
  • Lubricants or plasticizers include alcohols such as glycerin; higher fatty acids such as caprylic acid, lauric acid, palmitic acid, arachidic acid, oleic acid and stearic acid; and stearic acid metal salts such as Al stearate.
  • dispersant examples include inorganic acids such as nitric acid, hydrochloric acid, and sulfuric acid; organic acids such as oxalic acid, citric acid, acetic acid, malic acid, and lactic acid; alcohols such as methanol, ethanol, and propanol; ammonium polycarboxylate; Surfactants such as oxyalkylene alkyl ethers are listed.
  • solvent for example, alcohols such as methanol, ethanol, butanol and propanol; glycols such as propylene glycol, polypropylene glycol and ethylene glycol; and water can be used.
  • the sealing portion 72 a material that becomes ceramics by firing the same as the green molded body 70 can be used.
  • the sealing part 72 may seal the through-hole 70h by crimping or welding the partition walls 70W in the vicinity of the lower end surface 71a and the upper end surface 71b.
  • the green molded body 70 can be manufactured through, for example, the following extrusion process, drying process, and cutting process. First, an inorganic compound source powder, an organic binder, a solvent, and additives as necessary are prepared. Then, these are mixed by a kneader or the like to obtain a raw material mixture, and the obtained raw material mixture is extruded from an extruder having an outlet opening corresponding to the sectional shape of the partition wall, dried, and cut into a desired length A green molded body 70 can be obtained. Thereafter, the end of the through hole 70 h of the green molded body 70 is sealed by the sealing portion 72.
  • the green molded body 70 can be a honeycomb filter having a porosity of 50% or more after a firing step described later. Thereby, when applied as a honeycomb filter, pressure loss can be reduced. Further, when a honeycomb filter having a porosity of 50% or more after the firing process is used, the honeycomb filter tends to be a honeycomb filter having a bending strength of 1.5 MPa or less after the firing process.
  • the upper end surface member mounting step is such that the lower end surface 71 a is supported by the base 80 with the lower end surface 71 a facing downward and the upper end surface 71 b facing upward, and the upper end surface 71 b is supported by the upper end surface.
  • the member 90 is placed.
  • the base 80 has a cylindrical shape having the same diameter as the lower end surface 71a.
  • the height of the pedestal 80 can be set to, for example, 5 to 50 mm.
  • the upper end surface member 90 has a cylindrical shape having the same diameter as the upper end surface 71b.
  • the length from the uppermost portion of the upper end surface member 90 to the upper end surface 71b can be 0.05 times or more, 0.09 times or more, and 0.5 times or less the thickness (diameter) of the upper end surface.
  • the upper end surface of the base 80 and the lower end surface 71a of the green molded body 70 are arranged so as to coincide with each other.
  • the upper end surface 71b of the green molded body 70 and the lower end surface of the upper end surface member 90 are arranged to coincide with each other.
  • the pedestal 80 and the upper end surface member 90 are the ends of the green molded body 70 that have been precisely cut to produce a product as a diesel particulate filter or the like. Material can be applied.
  • the green molded body 70, the pedestal 80, and the upper end surface member 90 can have through-holes 70h and partition walls 70W having the same cross-sectional structure, and can have the same composition.
  • the green molded body in which the lower end surface 71a is supported by the pedestal 80 and the upper end surface member 90 is mounted on the upper end surface 71b as shown in FIG. 70 is fired to produce a honeycomb filter.
  • the green molded body 70 is supported by the pedestal 80 and placed in the firing furnace with the upper end surface member 90 placed thereon. Firing is usually performed using a conventional firing furnace such as a tubular electric furnace, a box-type electric furnace, a tunnel furnace, a far-infrared furnace, a microwave heating furnace, a shaft furnace, a reflection furnace, a rotary furnace, or a roller hearth furnace.
  • a conventional firing furnace such as a tubular electric furnace, a box-type electric furnace, a tunnel furnace, a far-infrared furnace, a microwave heating furnace, a shaft furnace, a reflection furnace, a rotary furnace, or a roller hearth furnace.
  • the green molded body 70 is calcined (degreasing) before firing.
  • the calcination (degreasing) is a process for removing the organic binder in the green molded body 70, the pedestal 80 and the upper end surface member 90 and the organic additive blended as necessary by burning, decomposition, etc.
  • the temperature is raised to the firing temperature (for example, a temperature range of 150 to 900 ° C.).
  • the firing temperature of the green molded body 70, the pedestal 80, and the upper end surface member 90 can usually be 1300 ° C. or higher or 1400 ° C. or higher. Moreover, a calcination temperature can be normally made into 1650 degrees C or less or 1550 degrees C or less.
  • the rate of temperature increase up to the firing temperature is not limited, but is usually 1 ° C./hour to 500 ° C./hour.
  • Firing is usually carried out in the atmosphere, but depending on the type of raw material powder used and the amount used, it may be fired in an inert gas such as nitrogen gas or argon gas, carbon monoxide gas, hydrogen gas, etc. You may bake in reducing gas like this.
  • the firing may be performed in an atmosphere in which the water vapor partial pressure is lowered.
  • the time required for firing is sufficient as long as ceramics are generated, and varies depending on the size of the green molded body 70, the type of firing furnace, firing temperature, firing atmosphere, etc., but usually 10 minutes to 100 hours. It is.
  • FIG. 4 a graph of the shrinkage curve showing the shrinkage rate of the green molded body with respect to temperature is shown in FIG.
  • a contraction curve is shown when the green molded body 70 is heated at a temperature rising rate of 5 ° C./min.
  • the shrinkage curve is 900 ° C. or higher, the tangential slope of the shrinkage curve becomes gentle as the temperature rises and then becomes steep as the temperature rises. It can be seen that it has an inflection point P.
  • the inflection point P means a point where the direction of bending of the contraction curve changes.
  • the green molded body 70 as shown in FIG. 1A, FIG. 1B, and FIG. 2 is fired, the end of the through hole 70h is sealed by the sealing portion 72. Gas is unlikely to escape between the lower end surface 71a and heat is not easily transmitted from the upper end surface 71b side to the lower end surface 71a side. Therefore, as shown in FIGS. 5 and 6, the green molded body 70 has a high temperature from the upper end surface 71 b, and the lower end surface 71 a side in contact with the pedestal 80 has a low temperature.
  • cracks C are generated inside the honeycomb filter 100 after firing due to the stress concentration generated in the vicinity of the upper end surface 71b.
  • the cracks C are formed along the isothermal curve in the temperature distribution of FIG. It progresses inside the filter 100, and finally a crack C appears on the lower end surface 71a as shown in FIG.
  • the shrinkage rate once decreases in the temperature range near 1300 ° C., so that the green molded body 70 is not uniformly contracted in each part and stress is generated.
  • the crack C tends to occur inside the honeycomb filter 100 after firing due to the stress concentration generated in the vicinity of the upper end surface 71b more remarkably.
  • the upper end surface member 90 is mounted on the upper end surface 71 b, thereby stress concentration due to a temperature gradient that causes cracking during firing. It is possible to make the transition where the most occurs occur to the peripheral edge portion of the upper end surface of the upper end surface member 90. Thereby, generation
  • the end material of the green molded body 70 manufactured by extruding the ceramic raw material is placed on the upper end surface 71b as the upper end surface member 90.
  • the green molded body 70 and the upper end surface member 90 are made of the same material and the same partition wall structure. Therefore, the green molded body 70 and the upper end surface member 90 have the same temperature characteristics, which are caused by temperature gradients that cause cracks during firing. The location where the stress concentration occurs can be surely easily shifted to the upper end surface member 90.
  • the end material produced at the time of manufacturing the green molded body 70 is applied as the upper end surface member 90, the cost can be reduced as compared with the case where the upper end surface member 90 is separately manufactured.
  • the upper end surface member 90 in the upper end surface member placement step, has a length from the uppermost portion of the upper end surface member 90 to the upper end surface 71b that is 0.05 times or more the thickness of the upper end surface 71b. Is placed on the upper end surface 71b. For this reason, the location where stress concentration due to a temperature gradient that causes cracking during firing can be reliably transferred to the upper end surface member 90.
  • the green molded body 70 can be a honeycomb filter 100 having a porosity of 50% or more after the firing process and a bending strength of 1.5 MPa or less after the firing process, and stress concentration. Therefore, when the method for manufacturing a honeycomb filter according to the present embodiment is applied, the effect of preventing the occurrence of cracks becomes remarkable.
  • the green molded body 70 has an inflection point in a temperature range where the shrinkage rate of the green molded body 70 with respect to the temperature is 900 ° C. or more, and stress concentration easily occurs, and cracking occurs. Therefore, when the method for manufacturing the honeycomb filter according to the present embodiment is applied, the effect of preventing cracking becomes remarkable.
  • the embodiment of the present invention is not limited to the above-described embodiment, and various modifications are possible.
  • the cross-sectional shape viewed from the lower end surface 71a and the upper end surface 71b of the through hole 70h of the green molded body 70 is not limited to a regular hexagon, but a hexagon other than a square, a rectangle, a circle, an ellipse, a triangle, and a regular hexagon. , Octagonal etc.
  • a plurality of types of through-holes 70 h having different cross-sectional shapes and dimensions may be formed in the green molded body 70.
  • the interval between the through holes 70h and the arrangement of the through holes 70h are not particularly limited.
  • the outer shape of the green molded body 70 is not limited to a cylinder whose lower end surface 71a and upper end surface 71b are circles.
  • the outer shape of the green molded body 70 can be a cylinder whose lower end surface 71a and upper end surface 71b are elliptical.
  • the outer diameter can be triangular, quadrangular, hexagonal, octagonal, etc.
  • the pedestal 80 and the upper end surface member 90 may not have the same composition as that of the green molded body 70, and may not have the same cross-sectional structure as the green molded body 70.
  • the diameter may not be the same as the lower end surface 71a and the upper end surface 71b of the green molded body 70.
  • a honeycomb filter was manufactured by the above-described method for manufacturing a honeycomb filter according to the present embodiment under the conditions shown in Table 1 below.
  • a green molded body 70 having a cylindrical shape as shown in FIGS. 1A and 1B was applied.
  • the ceramic raw material of the green molded body 70 was aluminum titanate, and potato starch was used as the pore former.
  • the green molded body 70 becomes a honeycomb filter 100 having a porosity of 59% after the firing step and a bending strength of 1.5 MPa or less after the firing step.
  • the shrinkage curve of the green molded body 70 is shown in FIG.
  • the base 80 and the upper end surface member 90 are as shown in FIG.
  • the diameter (mm) of the green molded body means the diameters of the lower end surface 71 a and the upper end surface 71 b of the green molded body 70.
  • the height (mm) of the green molded body means the length from the lower end surface 71 a to the upper end surface 71 b of the green molded body 70.
  • the thickness (mm) of the upper end surface member means a length from the uppermost portion of the upper end surface member 90 placed on the upper end surface 71b to the upper end surface 71b.
  • the green molded body 70 was fired under the conditions shown in Table 1 under the conditions of oxygen concentration and temperature with respect to time as shown in FIG.
  • the honeycomb filter manufacturing method of the embodiment of the present invention can prevent the honeycomb filter from cracking during firing.
  • 70 Green molded body, 70h ... Through hole, 70W ... Partition, 71a ... Lower end surface (first end surface), 71b ... Upper end surface (second end surface), 71c ... Side surface, 72 ... Sealing portion, 80 ... Base, 90 ... Upper end surface member, 100 ... honeycomb filter, C ... crack, P ... inflection point.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Ceramic Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Filtering Materials (AREA)
  • Devices For Post-Treatments, Processing, Supply, Discharge, And Other Processes (AREA)

Abstract

Selon la présente invention, à partir d'un corps moulé cru qui contient une matière céramique et dans lequel une extrémité d'un trou de pénétration du côté d'une surface d'extrémité inférieure ou d'une surface d'extrémité supérieure est fermée par un élément de fermeture, un filtre en nid d'abeilles est fabriqué par, lors d'une étape de placement d'un élément de surface d'extrémité supérieure, placement d'un élément de surface d'extrémité supérieure contenant une matière céramique sur la surface d'extrémité supérieure quand la surface d'extrémité inférieure est orientée vers le bas et la surface d'extrémité supérieure est orientée vers le haut, et, lors d'une étape de cuisson, cuisson du corps moulé cru avec l'élément de surface d'extrémité supérieure placé sur la surface d'extrémité supérieure. Lors de l'étape de placement de l'élément de surface d'extrémité supérieure, suite au placement de l'élément de surface d'extrémité supérieure contenant la matière céramique sur la surface d'extrémité supérieure, une transition vers ledit élément de surface d'extrémité supérieure se produit à un endroit où une concentration de la contrainte, qui est due à un gradient de température et qui devient une cause de fissures pendant la cuisson, se produit. En conséquence, le fissurage du filtre en nid d'abeilles pendant la cuisson peut être évité.
PCT/JP2016/073771 2015-08-25 2016-08-12 Procédé de fabrication d'un filtre en nid d'abeilles WO2017033774A1 (fr)

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JP2015165819A JP2018167397A (ja) 2015-08-25 2015-08-25 ハニカムフィルタの製造方法
JP2015-165819 2015-08-25

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2019063787A (ja) * 2017-09-29 2019-04-25 日立金属株式会社 セラミックハニカムフィルタの製造方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6795778B1 (ja) * 2020-03-30 2020-12-02 千住金属工業株式会社 フラックス、フラックスを用いたやに入りはんだ、フラックスを用いたフラックスコートはんだ、およびはんだ付け方法

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Publication number Priority date Publication date Assignee Title
JPS62202870A (ja) * 1986-02-20 1987-09-07 日本碍子株式会社 セラミツクスハニカム構造体の焼成方法
JPH02255576A (ja) * 1989-03-29 1990-10-16 Ngk Insulators Ltd セラミックハニカム構造体の焼成法
JPH0585856A (ja) * 1991-09-30 1993-04-06 Ngk Insulators Ltd セラミツクハニカム構造体の焼成方法
WO2006095835A1 (fr) * 2005-03-10 2006-09-14 Ngk Insulators, Ltd. Structure en nid d’abeille et methode de fabrication associee
JP2013223856A (ja) * 2012-03-22 2013-10-31 Ngk Insulators Ltd ハニカム構造体及びハニカム構造体の製造方法

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62202870A (ja) * 1986-02-20 1987-09-07 日本碍子株式会社 セラミツクスハニカム構造体の焼成方法
JPH02255576A (ja) * 1989-03-29 1990-10-16 Ngk Insulators Ltd セラミックハニカム構造体の焼成法
JPH0585856A (ja) * 1991-09-30 1993-04-06 Ngk Insulators Ltd セラミツクハニカム構造体の焼成方法
WO2006095835A1 (fr) * 2005-03-10 2006-09-14 Ngk Insulators, Ltd. Structure en nid d’abeille et methode de fabrication associee
JP2013223856A (ja) * 2012-03-22 2013-10-31 Ngk Insulators Ltd ハニカム構造体及びハニカム構造体の製造方法

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2019063787A (ja) * 2017-09-29 2019-04-25 日立金属株式会社 セラミックハニカムフィルタの製造方法
JP7151295B2 (ja) 2017-09-29 2022-10-12 日立金属株式会社 セラミックハニカムフィルタの製造方法

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