EP4559575A1 - Heating element - Google Patents

Heating element Download PDF

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Publication number
EP4559575A1
EP4559575A1 EP23894271.8A EP23894271A EP4559575A1 EP 4559575 A1 EP4559575 A1 EP 4559575A1 EP 23894271 A EP23894271 A EP 23894271A EP 4559575 A1 EP4559575 A1 EP 4559575A1
Authority
EP
European Patent Office
Prior art keywords
honeycomb structure
generating element
heat generating
structure unit
element according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP23894271.8A
Other languages
German (de)
English (en)
French (fr)
Inventor
Yukiharu Morita
Yoshiyuki Kasai
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NGK Insulators Ltd
Original Assignee
NGK Insulators Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by NGK Insulators Ltd filed Critical NGK Insulators Ltd
Publication of EP4559575A1 publication Critical patent/EP4559575A1/en
Pending legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/40—Heating elements having the shape of rods or tubes
    • H05B3/42—Heating elements having the shape of rods or tubes non-flexible
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/021—Heaters specially adapted for heating liquids
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/022—Heaters specially adapted for heating gaseous material
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/022—Heaters specially adapted for heating gaseous material
    • H05B2203/024—Heaters using beehive flow through structures

Definitions

  • the present invention relates to a heat generating element.
  • a heat generating element may be desired to utilize a heat generating element also in applications other than purification of an exhaust gas emitted from an internal combustion engine.
  • a shape of the heat generating element can be easily adjusted in accordance with the application.
  • the present invention provides a heat generating element, which has excellent heat generation characteristics, and has a shape that can be easily adjusted.
  • a heat generating element which has excellent heat generation characteristics, and has a shape that can be easily adjusted can be provided.
  • FIG. 1 is a schematic view for illustrating a schematic configuration of a heat generating element according to a first embodiment of the present invention, as viewed from above.
  • FIG. 2 is a perspective view for illustrating a schematic configuration of a first honeycomb structure unit forming the heat generating element illustrated in FIG. 1 .
  • FIG. 3 is a view for illustrating an example of a cross section taken along the line III-III of FIG. 1 .
  • FIG. 4 is a view for illustrating an example of a cross section of the heat generating element illustrated in FIG. 1 .
  • a heat generating element 100 includes a first honeycomb structure unit 1 and a second honeycomb structure unit 2.
  • the first honeycomb structure unit 1 and the second honeycomb structure unit 2 each include: a honeycomb structure portion 10 that can generate heat by energization; and a pair of electrode portions 20 and 20 that energize and heat the honeycomb structure portion 10.
  • the first honeycomb structure unit 1 includes the honeycomb structure portion 10 and the pair of electrode portions 20 and 20.
  • the honeycomb structure portion 10 includes partition walls 14 and an outer peripheral wall 16.
  • the partition walls 14 define and form a plurality of cells 12, which extend from a first end surface 10a to a second end surface 10b of the honeycomb structure portion 10 (in a lengthwise direction), and can serve as fluid flow passages.
  • the outer peripheral wall 16 is located on an outer periphery of the honeycomb structure portion 10, and surrounds the partition walls 14.
  • FIG. 2 shows the first honeycomb structure unit 1 illustrated in FIG. 1 as a representative, the second honeycomb structure unit 2 also has the same configuration.
  • the first honeycomb structure unit 1 and the second honeycomb structure unit 2 are arranged so that extending directions of the cells 12 (lengthwise directions) in the respective honeycomb structure portions 10 are aligned with each other.
  • the arrow of FIG. 1 indicates a flowing direction of a fluid.
  • the fluid having passed through the first honeycomb structure unit 1 may pass through the second honeycomb structure unit 2.
  • the first honeycomb structure unit 1 and the second honeycomb structure unit 2 are arranged away from each other.
  • the heat generating element 100 includes an insulating portion 30 formed between the first honeycomb structure unit 1 and the second honeycomb structure unit 2.
  • the fluid having passed through the first honeycomb structure unit 1 passes through the insulating portion 30 formed between the first honeycomb structure unit 1 and the second honeycomb structure unit 2, and then passes through the second honeycomb structure unit 2.
  • the heat generating element includes two honeycomb structure units, but may include three or more honeycomb structure units.
  • an insulating portion 30 is provided in advance on an end surface of the second honeycomb structure unit 2 on a side on which no first honeycomb structure unit 1 is arranged, and another honeycomb structure unit may be further provided through intermediation of this insulating portion 30.
  • the three or more honeycomb structure units may be arranged so that extending directions of the respective cells in the three or more honeycomb structure units are aligned with each other.
  • the three or more honeycomb structure units may be arranged away from each other.
  • the heat generating element can have extremely excellent heat generation characteristics.
  • energy applied in each of the honeycomb structure units can be efficiently utilized for increasing a temperature of the honeycomb structure portion serving as fluid flow passages.
  • a difference in temperature of the honeycomb structure portion may occur between an upstream side and a downstream side of the fluid flow passages (for example, the temperature on the downstream side may be higher than that on the upstream side), but in each of the honeycomb structure units, the temperature of the fluid flow passages can be satisfactorily controlled.
  • a short circuit between the honeycomb structure portions can be prevented, and for example, a failure such as damage on a device or a circuit that supplies electric power to the heat generating element can be prevented.
  • a shape of the heat generating element to be obtained can be adjusted in accordance with the application.
  • the outer peripheral wall 16 of the honeycomb structure portion 10 extends in the lengthwise direction.
  • the plurality of cells 12 are each defined as a space extending in the lengthwise direction.
  • a cross section of each of the cells 12 that is perpendicular to the lengthwise direction has a quadrangular shape, but may have any other polygonal shape, or may have any other shape such as a circular shape.
  • a thickness of the partition wall 14 is, for example, from 70 ⁇ m to 500 ⁇ m.
  • the number of the cells 12 per unit area in a plane orthogonal to the extending direction of the cells 12 is, for example, from 15 cells/cm 2 to 150 cells/cm 2 .
  • the thickness of the partition wall 14 and the number of cells 12 can be measured with, for example, a digital microscope.
  • An open area ratio of the honeycomb structure portion 10 is, for example, from 65% to 90%.
  • the open area ratio of the honeycomb structure portion 10 refers to an open area ratio per unit area in the plane orthogonal to the extending direction of cells 12 in the honeycomb structure portion 10.
  • the open area ratio of the honeycomb structure portion 10 is a ratio of the sum of areas of void portions of the cells 12 to a total area of the plane orthogonal to the extending direction of the cells 12 in the honeycomb structure portion 10.
  • the open area ratio of the honeycomb structure portion 10 can be measured with, for example, a digital microscope.
  • a hydraulic diameter of the cell 12 in the honeycomb structure portion 10 is, for example, from 0.7 mm to 1.8 mm.
  • the hydraulic diameter of the cell 12 in the honeycomb structure portion 10 is calculated, based on a peripheral length (unit: mm) surrounded by the partition walls 14 and a sectional area (unit: mm 2 ) of the cell 12, by the expression of 4 ⁇ (sectional area)/(peripheral length).
  • the peripheral length surrounded by the partition walls 14, and the sectional area of the cell 12 can be measured with, for example, a digital microscope.
  • a cross section of the outer peripheral wall 16 that is perpendicular to the lengthwise direction has a quadrangular shape, but may have any other polygonal shape, or may have any other shape such as a circular shape.
  • a thickness of the outer peripheral wall 16 is, for example, from 0.5 mm to 5 mm.
  • the honeycomb structure portions of the two honeycomb structure units forming the heat generating element have the same shape and size, but the heat generating element may include a plurality of honeycomb structure unit portions having different shapes and sizes.
  • the thickness of the outer peripheral wall 16 can be measured with, for example, a digital microscope.
  • the pair of electrode portions 20 and 20 are provided on the outer peripheral wall 16 of the honeycomb structure portion 10.
  • the pair of electrode portions 20 and 20 may be formed of electrode terminals, respectively.
  • One of the electrode terminals may be connected to a positive pole of a power source, and another one of the electrode terminals may be connected to a negative pole of the power source.
  • the honeycomb structure portion 10 is viewed from the extending direction of the cells 12, the pair of electrode portions 20 and 20 are arranged on one side from a center of the honeycomb structure portion 10. With such arrangement, extremely excellent assemblability of the heat generating element can be achieved. Further, such arrangement can also contribute to space saving at the time of installing the heat generating element.
  • the arrangement of the pair of electrode portions 20 and 20 is not particularly limited as long as the honeycomb structure portion 10 can be energized and heated.
  • the pair of electrode portions 20 and 20 may be arranged with the center of the honeycomb structure portion 10 located therebetween.
  • the electrode terminal having a columnar shape is provided as each of the electrode portions 20, but a shape and a size of the electrode terminal are not particularly limited.
  • the shape of the electrode terminal may be a prismatic shape or a comb shape.
  • the electrode portion 20 may be configured by forming an electrode layer (not shown) on the outer peripheral wall 16 of the honeycomb structure portion 10 and providing an electrode terminal through intermediation of this electrode layer.
  • a thickness of the electrode layer is, for example, from 100 ⁇ m to 5 mm.
  • An insulating member 31 made of an insulating material may be arranged in the insulating portion 30.
  • the insulating member 31 is arranged in contact with the first honeycomb structure unit 1 and the second honeycomb structure unit 2.
  • the insulating member 31 be joined to the first honeycomb structure unit 1 and the second honeycomb structure unit 2.
  • a method of joining the insulating member 31 is not particularly limited.
  • the insulating member 31 may be joined to the honeycomb structure unit with use of an adhesive material or a joining component. Further, for example, at the time of manufacturing the honeycomb structure unit (honeycomb structure portion 10), the insulating member 31 may be formed integrally therewith.
  • a region 40 in which the honeycomb structure portion 10 of the first honeycomb structure unit 1 and the insulating member 31 do not overlap each other may be defined in the insulating portion 30.
  • the region 40 without the insulating member 31 is defined in a center part of the honeycomb structure portion 10 of the first honeycomb structure unit 1.
  • a space portion 42 surrounded by an inner peripheral wall 38 of the insulating member 31 is defined in the insulating portion 30.
  • the insulating member 31 includes partition walls 34 and an outer peripheral wall 36.
  • the partition walls 34 define and form a plurality of cells 32, which extend from a first end surface 31a to a second end surface 31b of the insulating member 31 (in the lengthwise direction), and can serve as fluid flow passages.
  • the outer peripheral wall 36 is located on an outer periphery of the insulating member 31, and surrounds the partition walls 34.
  • the insulating member 31 is arranged so that an extending direction of the cells 32 in the insulating member 31 is aligned with the extending direction of the cells 12 in the first honeycomb structure unit 1 and the extending direction of the cells 12 in the second honeycomb structure unit 2.
  • the insulating member 31 having a honeycomb structure With the insulating member 31 having a honeycomb structure, a pressure loss caused by a fluid passing through the insulating portion 30 can be reduced. Regarding details of the honeycomb structure of the insulating member 31, the same description as that given with regard to the honeycomb structure portion 10 as described above can be applied.
  • the open area ratio of the honeycomb structure portion 10 as described above may be designed to be smaller than an open area ratio of the insulating member 31.
  • the open area ratio of the honeycomb structure portion 10 may be designed to be smaller.
  • the open area ratio of the insulating member 31 may be designed to be larger.
  • the open area ratio of the insulating member 31 is preferably from 70% to 92%.
  • the open area ratio of the insulating member 31 refers to an open area ratio per unit area in a plane orthogonal to the extending direction of the cells 32 in the insulating member 31.
  • the open area ratio of the insulating member 31 is a ratio of the sum of areas of void portions of the cells 32 to a total area of the plane orthogonal to the extending direction of the cells 32 in the insulating member 31.
  • the open area ratio of the insulating member 31 is a ratio of the sum of the areas of the void portions of the cells 32 to an area of a region surrounded by the outer peripheral wall 36 excluding the space portion 42, in the plane orthogonal to the extending direction of the cells 32 in the insulating member 31.
  • the hydraulic diameter of the cell 12 in the honeycomb structure portion 10 as described above may be designed to be smaller than a hydraulic diameter of the cell 32 in the insulating member 31.
  • the hydraulic diameter of the cell 12 in the honeycomb structure portion 10 may be designed to be smaller.
  • the hydraulic diameter of the cell 32 in the insulating member 31 may be designed to be larger.
  • the hydraulic diameter of the cell 32 in the insulating member 31 is preferably from 0.9 mm to 2 mm.
  • the hydraulic diameter of the cell 32 in the insulating member 31 is calculated, based on a peripheral length (unit: mm) surrounded by the partition walls 34 and a sectional area (unit: mm 2 ) of the cell 32, by the expression of 4 ⁇ (sectional area)/(peripheral length).
  • FIG. 5 is a sectional view for illustrating a schematic configuration of a honeycomb structure unit in a modification example.
  • the honeycomb structure portion 10 has a first slit 17 and a second slit 18.
  • the first slit 17 extends from a first portion P1 toward a second portion P2, which face each other, of the outer peripheral wall 16 (side surfaces of the honeycomb structure portion 10).
  • the second slit 18 extends from the second portion P2 toward the first portion P1, which face each other, of the outer peripheral wall 16.
  • Such slits can function as electrical insulating portions.
  • the honeycomb structure portion 10 can be caused to stably generate heat.
  • the second slit 18 is defined so as to be located between first slits 17 and 17 that are arranged adjacent to each other, the entire honeycomb structure portion 10 can be caused to more uniformly generate heat.
  • a volume resistivity of the honeycomb structure portion 10 is, for example, 0.001 ⁇ cm or more, preferably 0.01 ⁇ cm or more, more preferably 0.1 ⁇ cm or more. With such a volume resistivity, a failure such as an excessive electric current flowing, which may be caused depending on the applied voltage, can be prevented. Meanwhile, a volume resistivity of the honeycomb structure portion 10 is, for example, 200 ⁇ cm or less, preferably 100 ⁇ cm or less. With such a volume resistivity, the honeycomb structure portion 10 can sufficiently generate heat by energization. The volume resistivity may be a value measured at a temperature of 25°C using a four-terminal method.
  • the honeycomb structure portion 10 is preferably made of ceramics. With the adoption of ceramics, the above-mentioned volume resistivity can be satisfactorily satisfied. Further, ceramics has a low thermal expansion coefficient, and hence can have excellent shape stability as well.
  • the honeycomb structure portion 10 is made of, for example, a material containing silicon carbide.
  • the honeycomb structure portion 10 is preferably made of a material containing a silicon carbide material or a silicon-silicon carbide composite material as a main component.
  • the expression "containing as a main component” means that the content of the component in the material is, for example, 80 mass% or more, preferably 90 mass% or more.
  • the above-mentioned silicon carbide material may be a material impregnated with silicon (silicon-impregnated silicon carbide).
  • the silicon-silicon carbide composite material may be a material in which a plurality of silicon carbide particles are bonded to each other by metal silicon.
  • silicon carbide particles may function as aggregate, and silicon may function as a binding material.
  • the volume resistivity of the honeycomb structure portion 10 may also be controlled by adjusting a porosity thereof.
  • the honeycomb structure portion 10 can be obtained by drying and firing a molded body obtained by molding of a molding material containing a ceramic raw material.
  • the above-mentioned molding material may contain silicon carbide (for example, silicon carbide powder) and metal silicon (for example, metal silicon powder).
  • silicon carbide for example, silicon carbide powder
  • metal silicon for example, metal silicon powder
  • other raw material that may be contained in the molding material include a binder, a dispersant, and an additive.
  • the honeycomb structure portion 10 may be used as a catalyst carrier, and a catalyst may be supported on the partition walls 14 of the honeycomb structure portion 10.
  • a catalyst may be supported on the partition walls 14 of the honeycomb structure portion 10.
  • CO, NO x , and a hydrocarbon in a fluid (e.g., gas) passing through the cell 12 can be changed to a harmless substance by a catalytic reaction.
  • the catalyst may preferably contain a precious metal (e.g., platinum, rhodium, palladium, ruthenium, indium, silver, or gold), aluminum, nickel, zirconium, titanium, cerium, cobalt, manganese, zinc, copper, tin, iron, niobium, magnesium, lanthanum, samarium, bismuth, barium, and combinations thereof.
  • the volume resistivity of the electrode portion 20 varies depending on a configuration and a constituent material of the electrode portion 20, but is typically from 1 ⁇ 10 -6 ⁇ cm to 10 ⁇ cm, preferably from 0.01 ⁇ cm to 10 ⁇ cm.
  • the electrode portion 20 may include any appropriate material.
  • a metal, conductive ceramics, or a composite material (cermet) of a metal and conductive ceramics may be used as a constituent material of the electrode portion 20.
  • the metal include Cr, Fe, Co, Ni, Si, and Ti. Those materials may be used alone or in combination. When two or more kinds thereof are used in combination, an alloy of two or more kinds of metals may be used.
  • the conductive ceramics include: silicon carbide (SiC); and metal compounds, for example, metal silicides, such as tantalum silicide (TaSi 2 ) and chromium silicide (CrSi 2 ).
  • the composite material (cermet) of a metal and conductive ceramics include a composite material of a metal silicon and silicon carbide, and a composite material of the metal silicide, a metal silicon, and silicon carbide.
  • specific examples of the composite material (cermet) of a metal and conductive ceramics include composite materials obtained by adding one kind or two or more kinds of insulating ceramics, such as alumina, mullite, zirconia, cordierite, silicon nitride, and aluminum nitride, to one kind or two or more kinds of the above-mentioned compounds or a metal from the viewpoint of reducing thermal expansion.
  • the shape of the electrode terminal be a comb shape.
  • the constituent material of the electrode terminal is conductive ceramics or a composite material (cermet) of a metal and conductive ceramics
  • the shape of the electrode terminal be a circular shape or a prismatic shape.
  • metal portions may be joined to both end parts of the electrode terminal, respectively.
  • the electrode terminal made of ceramics and the metal portions may be joined to each other by employing, for example, swaging, welding, or a conductive adhesive.
  • An example of a material of the metal portion may be a conductive metal, such as an iron alloy or a nickel alloy.
  • the electrode portion 20 be made of a material having the same quality as that of the material of the honeycomb structure portion 10. With such a configuration, a difference in thermal expansion coefficient between the honeycomb structure portion 10 and the electrode portion 20 can be reduced, and hence joining strength therebetween can be increased. Further, the above-mentioned configuration can also contribute to an improvement in productivity.
  • the volume resistivity of the electrode portion 20 may be controlled by adjusting a porosity thereof.
  • a volume resistivity of the insulating member 31 is preferably 1 ⁇ 10 10 ⁇ cm or more, more preferably 1 ⁇ 10 12 ⁇ cm or more. Meanwhile, the volume resistivity insulating member 31 is, for example, 1 ⁇ 10 16 ⁇ cm or less.
  • the insulating member 31 may be made of any appropriate material that can satisfy the above-mentioned volume resistivity.
  • the insulating member 31 is preferably made of ceramics. With the adoption of ceramics, the above-mentioned volume resistivity can be satisfactorily satisfied. Further, ceramics has a low thermal expansion coefficient, and hence can have excellent shape stability as well. In addition, with the adoption of ceramics, a difference in thermal expansion coefficient between the honeycomb structure portion 10 and the insulating member 31 can be reduced, and hence a thermal shock resistance can be improved.
  • the ceramics include cordierite, mullite, alumina, spinel, silicon carbide, silicon nitride, and aluminum titanate. Those ceramics may be used alone or in combination.
  • a catalyst may be supported on the partition walls 34 of the insulating member 31.
  • CO, NO x , a hydrocarbon, or the like in a fluid (for example, gas) passing through the cells 32 can be changed to a harmless substance by a catalytic reaction.
  • a fluid for example, gas
  • Specific examples of the catalyst are as described above.
  • FIG. 6 is a sectional view for schematically illustrating a schematic configuration of a heat generating element according to a second embodiment of the present invention.
  • a heat generating element 200 is different from the heat generating element 100 of the first embodiment in that no space portion 42 is defined in the insulating portion 30 (no inner peripheral wall 38 is formed in the insulating member 31).
  • the heat generating element 200 is different from the heat generating element 100 of the first embodiment in that, when the first honeycomb structure unit 1 is viewed from the extending direction of the cells 12, no region 40 in which the honeycomb structure portion 10 of the first honeycomb structure unit 1 and the insulating member 31 do not overlap each other is defined in the insulating portion 30.
  • no space portion 42 being defined in the insulating portion 30, an excellent mechanical strength can be achieved. Further, a more excellent insulating property can be achieved in some cases.
  • the present invention is not limited to the above-mentioned embodiments, and various modifications may be made thereto.
  • the configurations described in the above-mentioned embodiments may each be replaced by substantially the same configuration, a configuration having the same action and effect, and a configuration that can achieve the same object.
  • the heat generating element according to each of the embodiments of the present invention may be used as, for example, a catalyst carrier having a catalyst supported thereon.
  • honeycomb structure unit 1 honeycomb structure unit, 2 honeycomb structure unit, 10 honeycomb structure portion, 12 cell, 14 partition wall, 16 outer peripheral wall, 17 first slit, 18 second slit, 20 electrode portion, 30 insulating portion, 31 insulating member, 32 cell, 34 partition wall, 36 outer peripheral wall, 42 space portion, 100 heat generating element, 200 heat generating element

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  • Exhaust Gas Treatment By Means Of Catalyst (AREA)
  • Catalysts (AREA)
  • Exhaust Gas After Treatment (AREA)
EP23894271.8A 2022-11-21 2023-10-05 Heating element Pending EP4559575A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2022185922 2022-11-21
PCT/JP2023/036367 WO2024111259A1 (ja) 2022-11-21 2023-10-05 発熱体

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EP4559575A1 true EP4559575A1 (en) 2025-05-28

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EP23894271.8A Pending EP4559575A1 (en) 2022-11-21 2023-10-05 Heating element

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JP (1) JPWO2024111259A1 (https=)
WO (1) WO2024111259A1 (https=)

Family Cites Families (9)

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Publication number Priority date Publication date Assignee Title
JPH03246315A (ja) * 1990-02-23 1991-11-01 Nissan Motor Co Ltd 触媒コンバータ
JP3668885B2 (ja) * 2000-04-13 2005-07-06 日本冶金工業株式会社 自己発熱可能なメタルハニカム構造体
JP2005194935A (ja) * 2004-01-07 2005-07-21 Isuzu Motors Ltd 排気ガス浄化装置
JP5193922B2 (ja) * 2009-03-30 2013-05-08 日本碍子株式会社 排ガス浄化処理装置
JP2011098306A (ja) * 2009-11-06 2011-05-19 Gifu Univ 揮発性有機化合物処理装置
JP6447901B2 (ja) * 2014-06-11 2019-01-09 東海高熱工業株式会社 発熱構造体
JP2020143662A (ja) * 2019-01-09 2020-09-10 マレリ株式会社 触媒コンバータ及び電熱触媒用電極カバー
JP7594398B2 (ja) * 2020-09-24 2024-12-04 イビデン株式会社 電気加熱式触媒
JP7713848B2 (ja) * 2021-01-15 2025-07-28 日本碍子株式会社 セラミックス体及びその製造方法、ヒーターエレメント、ヒーターユニット、ヒーターシステム並びに浄化システム

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