WO2011058916A1 - Matériau composite thermo-isolant - Google Patents

Matériau composite thermo-isolant Download PDF

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Publication number
WO2011058916A1
WO2011058916A1 PCT/JP2010/069561 JP2010069561W WO2011058916A1 WO 2011058916 A1 WO2011058916 A1 WO 2011058916A1 JP 2010069561 W JP2010069561 W JP 2010069561W WO 2011058916 A1 WO2011058916 A1 WO 2011058916A1
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Prior art keywords
heat insulating
insulating material
honeycomb structure
composite heat
thermal conductivity
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PCT/JP2010/069561
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English (en)
Japanese (ja)
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渡邊敬一郎
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日本碍子株式会社
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Priority to JP2011540480A priority Critical patent/JPWO2011058916A1/ja
Publication of WO2011058916A1 publication Critical patent/WO2011058916A1/fr

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D1/00—Casings; Linings; Walls; Roofs
    • F27D1/0003—Linings or walls
    • F27D1/0006—Linings or walls formed from bricks or layers with a particular composition or specific characteristics
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D1/00—Casings; Linings; Walls; Roofs
    • F27D1/04—Casings; Linings; Walls; Roofs characterised by the form, e.g. shape of the bricks or blocks used
    • F27D1/06—Composite bricks or blocks, e.g. panels, modules
    • F27D1/063—Individual composite bricks or blocks
    • F27D1/066—Individual composite bricks or blocks made from hollow bricks filled up with another material

Definitions

  • the present invention relates to a composite heat insulating material, for example, a composite heat insulating material suitable for use in a heat insulating material such as a continuous furnace (tunnel furnace).
  • a continuous furnace (tunnel furnace) is often used when a ceramic molded body is fired to produce a ceramic sintered product.
  • the continuous furnace is, for example, a ceramic molded body by placing a workpiece (ceramic molded body) on a base made of a ceramic sintered body and transporting the base from the inlet to the outlet of the continuous furnace by a carriage. Is a furnace for firing.
  • a furnace for firing it is possible to form various temperature distributions from the inlet to the outlet depending on the temperature zone division for the continuous furnace body and the conveyance speed.
  • a chain conveyor, a pusher, etc. are used for conveyance of a trolley
  • the outer wall is made of a heat insulating material so that the internal temperature distribution can be maintained (see, for example, JP-A-7-49181).
  • Japanese Patent Application Laid-Open No. 2003-314970 discloses an example in which a refractory brick, a refractory heat insulating brick, a castable refractory, a ceramic fiber molded body, or the like is used as a heat insulating material for an electric furnace.
  • the thermal conductivity is an important parameter. Also, for furnaces that are large in scale, such as continuous furnaces, it is also important to be able to produce heat insulating materials at low cost and to be easily assembled in order to reduce the cost of products (ceramic sintered bodies, etc.) It becomes a big factor.
  • Examples of the heat insulating material that can be manufactured at low cost and can be easily assembled include refractory bricks described in Patent Document 2.
  • the thermal conductivity of refractory bricks, etc. is as high as 1.6 to 2.5 (W / m ⁇ K). For example, when used as a thermal insulation for a continuous furnace, it is difficult to maintain a set temperature distribution. There is a problem of becoming.
  • the present invention has been made in consideration of such problems.
  • a composite heat insulating material that can be manufactured at low cost, is easy to assemble, and has a thermal conductivity of less than 1.0 (W / m ⁇ K). The purpose is to provide.
  • a heat insulating material composed of a combination of a gas having a low thermal conductivity and ceramic powder was assumed.
  • the case where air is selected as the gas having a small thermal conductivity is shown in Table 1 described later.
  • this heat insulating material has a low thermal conductivity of 0.04 to 0.11 at room temperature, indicating that the heat insulating effect is high.
  • a large amount of ceramic powder is placed in a ceramic box-like container such as alumina when it is configured as a realistic heat insulating material. It is conceivable to form a heat insulating material by filling.
  • a box-shaped ceramic container is weak in strength and cannot maintain its shape due to breakage, so that it is difficult to assemble it into a continuous furnace or the like, and it is difficult to manufacture, and thus costs are high.
  • the composite heat insulating material according to the present invention includes a block-shaped honeycomb structure having a large number of accommodating spaces each partitioned by a thin wall, and ceramic powder filled in the accommodating spaces of the honeycomb structure. It is characterized by.
  • the ceramic powder filled in the honeycomb structure space suppresses heat transfer due to convection by interfering with the gas flow.
  • the present invention can provide a composite heat insulating material that can be manufactured at low cost, can be easily assembled, and has a thermal conductivity of less than 1.0 (W / m ⁇ K).
  • the thermal conductivity room temperature
  • the thermal conductivity can be 0.06 to 0.55 (W / m ⁇ K), which is one digit lower than that of refractory bricks.
  • disconnected in the direction orthogonal to the axial direction may be a shape where several thin walls were located in parallel.
  • the direction in which the plurality of thin walls are arranged (second direction) is smaller than the thermal conductivity in the direction in which the plurality of thin walls extend (first direction) because there is no heat conduction due to heat transfer of the thin walls.
  • the thermal conductivity can be made anisotropic. The anisotropy of the thermal conductivity can be increased several times or more as will be described later.
  • the heat radiation direction and the first direction are substantially matched.
  • the heat radiation direction and the second direction may be substantially matched.
  • the cross-sectional shape when the honeycomb structure is cut in a direction orthogonal to the axial direction thereof may be a shape in which a plurality of thin walls are combined in a lattice shape.
  • the angle of the lattice-like intersection is approximately 90 °, the heat conductivity does not depend on the assembling direction, so that it is possible to assemble without worrying about the directionality.
  • the angle of the lattice-like intersection may be 30 to 60 °.
  • the composite heat insulating material according to the present invention can be manufactured at low cost, can be easily assembled, and has a thermal conductivity (room temperature) of less than 1.0 (W / m ⁇ K). can do.
  • FIG. 6A is a front view showing a state in which the first to third Seralek honeycomb materials are installed in the opening of the box test firing furnace
  • FIG. 6B is a front view showing the state shown in FIG. 6A. It is a side view which abbreviate
  • the composite heat insulating material (hereinafter referred to as the first composite heat insulating material 10A) according to the first embodiment includes a large number of accommodation spaces 14 each partitioned by a thin wall 12, as shown in FIGS. And a ceramic powder 18 filled in the accommodation space 14 of the honeycomb structure 16.
  • the side surface of the honeycomb structure 16 is closed by an outer wall 20 (for example, a wall made of the same material as the thin wall 12), and the upper and lower surfaces of the honeycomb structure 16 are plugged layers 22 (made of the same material as the thin wall material). (See FIG. 1). That is, all the openings are sealed.
  • the planar shape of the upper surface and the lower surface of the honeycomb structure 16 is a quadrangle (a square in the example of FIG. 2).
  • the honeycomb structure 16 having the upper surface opening and the lower surface opening is manufactured, and then the plugging layer 22 is formed on the lower surface of the honeycomb structure 16, for example.
  • the honeycomb structure 16 having an upper surface opening is manufactured.
  • the ceramic powder 18 is inserted and filled into each housing space 14 from the upper surface opening, and then the upper surface opening is closed with the sealing layer 22, thereby producing the first composite heat insulating material 10 ⁇ / b> A.
  • the honeycomb structure 16 of the first composite heat insulating material 10A has a plurality of thin walls when the cross-sectional shape when the honeycomb structure 16 is cut in a direction orthogonal to the axial direction is viewed. 12 is arranged in parallel.
  • two outer walls (first outer wall and second outer wall) facing each other of the honeycomb structure 16 and a plurality of thin walls are arranged in parallel.
  • the material of the thin wall 12 is an oxide, carbide, nitride or a mixture thereof, and as constituent elements other than oxygen, carbon and nitrogen, sodium, potassium, calcium, magnesium, strontium, barium, titanium, manganese, An inorganic material containing at least one of iron, aluminum, and silicon can be used.
  • the main crystal phase is a ceramic material of mullite (3Al 2 O 3 ⁇ 2SiO 2 ) consisting of porosity thermal conductivity 30% 2.5 (W / m ⁇ K) .
  • a composite heat insulating material (hereinafter referred to as a second composite heat insulating material 10B) according to the second embodiment will be described with reference to FIG.
  • This second composite heat insulating material 10B has substantially the same configuration as the first composite heat insulating material 10A described above, but when the honeycomb structure 16 is cut in a direction orthogonal to the axial direction as shown in FIG. When the cross-sectional shape is viewed, the difference is that a plurality of thin walls 12 are combined in a lattice shape. In the example of FIG.
  • a composite heat insulating material (hereinafter referred to as a third composite heat insulating material 10C) according to a third embodiment will be described with reference to FIG.
  • the third composite heat insulating material 10C has substantially the same configuration as the above-described second composite heat insulating material 10B.
  • each thin wall 12 has a first outer wall 20a and a second outer wall 20b. It has a grid shape with an inclination of 45 ° and an inclination of 45 ° with respect to the third outer wall 20c and the fourth outer wall 20d.
  • the outer shape of the honeycomb structure 16 is a square, but other shapes include a rectangle, a rhombus, a parallelogram, a trapezoid, a hexagon, an octagon, and the like.
  • it is not limited to these, and when assembled, it can take a large contact area with other composite heat insulating materials, and in addition, a polygon with a plane portion so that loading is easy during assembly It is preferable that
  • the thermal conductivity in the arrow X direction and the arrow Y direction illustrated in FIGS. 2 to 4 and the Z direction which is the extrusion direction of the honeycomb structure is simulated. And obtained by actual measurement.
  • the thermal conductivity kp of the ceramic powder 18 when a specific gas layer 30 is filled with a large number of ceramic particles 32 is expressed by the following exact formula and simplified formula: I asked for it.
  • kp kc [1 + 2vd (1-kc / kd) / ⁇ (2kc / kd) +1 ⁇ ] / [1-vd (1-kc / kd) / ⁇ (kc / kd) +1 ⁇ ] (1 )
  • kp kc (1 + 2vd) / (1-vd) (2)
  • kc is the thermal conductivity of the gas
  • kd is the thermal conductivity of the ceramic particles
  • vd is the ceramic volume fraction, indicating the volume ratio of the ceramic in the ceramic powder.
  • thermal conductivity kp with respect to the ceramic volume fraction at room temperature is as shown in Table 1 below from the equations (1) and (2).
  • the thermal conductivity of ceramic particles is 30 W / m ⁇ K (alumina) larger than 2 W / m ⁇ K (zirconia).
  • the thermal conductivity of the powder is ceramic.
  • the thermal conductivity of the ceramic powder can be reduced. Since the ceramic volume fraction is proportional to the bulk density of the ceramic powder, the thermal conductivity can be reduced by selecting a powder with a low bulk density.
  • the thermal conductivities of air, alumina and zirconia at 1,000 ° C. are 0.076 (W / m ⁇ K), 6 (W / m ⁇ K) and 2.3 (W / m ⁇ K), respectively. It is. Therefore, the thermal conductivity kp of the ceramic powder with respect to the ceramic volume fraction at 1,000 ° C. is as shown in Table 2 below.
  • the thermal conductivity of the powder is 6 W / m ⁇ K (alumina) or more than twice as large as 2.3 W / m ⁇ K (zirconia), the thermal conductivity of the powder is increased. Is almost determined by the ceramic volume fraction, and by using a powder having a small ceramic volume fraction, the thermal conductivity of the powder can be reduced. Since the ceramic volume fraction of the powder is proportional to the bulk density of the powder, the thermal conductivity can be reduced by selecting a powder with a low bulk density.
  • Example 1 As shown in FIG. 2, the heat conductivity about the arrow Y direction in 10 A of 1st composite heat insulating materials was calculated
  • the arrow Y direction is a direction connecting the third outer wall 20c and the fourth outer wall 20d, and is also an extending direction of each thin wall 12.
  • Mullite composition as the honeycomb structure becomes such clay 55 wt% (high purity kaolinite: Al 2 Si 2 O 5 ( OH) 4) and ordinary alumina powder 45 wt% (purity: 99.6%, average particle size: 55 ⁇ m)
  • a columnar clay that has been deaerated with a vacuum kneader is prepared. Extrusion molding was carried out using a die. The obtained honeycomb structure formed body was dried and then fired in air at 1,450 ° C.
  • a sample having a cross-sectional shape of 30 mm square and a thickness of one cell in the X direction and a sample having a thickness of 6 mm in the Y direction were also prepared for thermal conductivity measurement.
  • the thickness of the thin wall after firing was 1 mm
  • the cell pitch in the X direction was 5 mm
  • the aperture ratio was 0.8.
  • a paste made by adding an appropriate amount of water and a binder to the same mixture of clay and alumina as the honeycomb structure on one end face of the honeycomb structure was press-fitted uniformly about 5 mm from one side, dried and sealed.
  • alumina powder was filled into the container formed in the gap between the thin walls from the opening on the opposite side with the sealed surface down.
  • the alumina powder used was coarse alumina with an alumina purity of 99.6%, an average particle size of 75 ⁇ m, a specific surface area of 0.6 m 2 / g, a bulk density of 1 g / cc when filled, and a ceramic volume fraction of 0.25. Met.
  • a paste made by adding an appropriate amount of water and a binder to the same clay and alumina mixture as the honeycomb structure at the opening end portion was pressed uniformly about 5 mm from one side, dried and sealed. .
  • the honeycomb structure thus obtained was fired in the atmosphere at 1,400 ° C. for 3 hours to produce a block-shaped composite heat insulating material of 100 mm ⁇ 100 mm ⁇ 100 mm.
  • the thin wall portion made of mullite had a porosity of 30% and a thermal conductivity of 2.5 W / m ⁇ K at room temperature.
  • the thermal conductivity (room temperature) of the ceramic powder portion is 0.05 (W / m ⁇ K) [From Table 1] Since the thermal conductivity (room temperature) of the thin wall 12 is 2.5 (W / m ⁇ K), the thermal conductivity in the arrow Y direction in the first composite heat insulating material 10A was determined.
  • v 1 is the honeycomb aperture ratio (opening area of the accommodation space 14 / upper surface area of the honeycomb structure 16)
  • v 2 is 1-v 1
  • k 1 is the thermal conductivity of the ceramic powder 18
  • k 2 is thin This is the thermal conductivity of the wall 12.
  • the Z direction which is the extrusion direction of the honeycomb, has the same structure as the Y direction, so the thermal conductivity in the Z direction is equal to the thermal conductivity in the Y direction.
  • the thermal conductivity in the arrow X direction in the first composite heat insulating material 10A was determined.
  • the arrow X direction is a direction connecting the first outer wall 20a and the second outer wall 20b, and is also a direction orthogonal to the extending direction of each thin wall 12.
  • the thermal conductivity in the arrow X direction in the first composite heat insulating material 10A is expressed by the following equation (4).
  • kpx k 1 k 2 / (v 1 k 2 + v 2 k 1 ) (4)
  • the calculated values kpx and kpy of the thermal conductivity (room temperature) with respect to the honeycomb aperture ratio in the directions of the arrows X and Y (Z) in the first composite heat insulating material 10A are as shown in Table 3 below.
  • the thermal conductivity was 9 times different between the X and Y directions.
  • the Z direction which is the extrusion direction of the honeycomb has the same structure as the Y direction of the first composite heat insulating material 10A, and can be obtained by Expression (3).
  • Example 1 As in Example 1, 55% by weight of clay (high purity kaolinite: Al 2 Si 2 O 5 (OH) 4 ) and ordinary alumina with a mullite composition (3Al 2 O 3 .2SiO 2 ) as a honeycomb structure. After adding 45% by weight of powder (purity: 99.6%, average particle size: 55 ⁇ m) to a mixture of a mixture ratio, water and a binder are added in an appropriate amount, kneaded to form a clay, and then degassed with a vacuum kneader. A clay was prepared and extruded using a predetermined die. The obtained honeycomb structure formed body was dried and then fired in air at 1,450 ° C.
  • powder purity: 99.6%, average particle size: 55 ⁇ m
  • a sample with an extrusion length of 30 mm for measuring the thermal conductivity in the X direction and a sample with an extrusion length of 20 mm for measuring the thermal conductivity in the Z direction was also prepared.
  • the thickness of the thin wall after firing was 0.25 mm
  • the cell pitch in the X direction and the Y direction was 5 mm
  • the aperture ratio was 0.9.
  • a paste made by adding an appropriate amount of water and a binder to the same mixture of clay and alumina as the honeycomb structure on one end face of the honeycomb structure was press-fitted uniformly about 5 mm from one side, dried and sealed.
  • alumina powder was filled into the container formed in the gap between the thin walls from the opening on the opposite side with the sealed surface down.
  • the alumina powder used was coarse alumina with an alumina purity of 99.6%, an average particle size of 75 ⁇ m, a specific surface area of 0.6 m 2 / g, a bulk density of 1 g / cc when filled, and a ceramic volume fraction of 0.25. Met.
  • a paste made by adding an appropriate amount of water and a binder to the same clay and alumina mixture as the honeycomb structure at the open end was press-fitted uniformly about 5 mm from one side, dried and sealed. .
  • the honeycomb structure thus obtained was fired in the atmosphere at 1,400 ° C. for 3 hours, and 100 mm ⁇ 100 mm ⁇ 100 mm, 100 mm ⁇ 100 mm ⁇ 30 mm, 100 mm ⁇ 100 mm ⁇ 20 mm block composite heat insulating materials were produced.
  • the thin wall portion made of mullite had a porosity of 30% and a thermal conductivity of 2.5 W / m ⁇ K at room temperature.
  • the thermal conductivity (room temperature) of the ceramic powder portion is 0.05 (W / M ⁇ K). Since the thermal conductivity (room temperature) of the thin wall 12 is 2.5 (W / m ⁇ K), the thermal conductivity in the direction of the arrow X in the second composite heat insulating material 10B is calculated from the equation (6) in the Z direction. The thermal conductivity of was determined from equation (3).
  • one cell was cut out from a sample with a length of 30 mm in the Z direction, processed to a 30 mm square, and the thermal conductivity was measured by a laser flash method.
  • the heat conductivity in the Z direction is cut out from the sample with a thickness of 20 mm in the Z direction by machining about 30 mm square parts for 6 cells in the X and Y directions, and the plugged portions are cut off from the upper and lower surfaces in the Z direction.
  • the thickness of the part was finished so as to be about 1 mm, and the thermal conductivity was measured by a laser flash method.
  • Example 3 As shown in FIG. 4, the heat conductivity about the arrow X direction and the Y direction in 10 C of 3rd composite heat insulating materials was calculated
  • Example 1 As in Example 1, 55% by weight of clay (high purity kaolinite: Al 2 Si 2 O 5 (OH) 4 ) and ordinary alumina with a mullite composition (3Al 2 O 3 .2SiO 2 ) as a honeycomb structure. After adding 45% by weight of powder (purity: 99.6%, average particle size: 55 ⁇ m) to a mixture of a mixture ratio, water and a binder are added in an appropriate amount, kneaded to form a clay, and then degassed with a vacuum kneader. A clay was prepared and extruded using a predetermined die. The obtained honeycomb structure formed body was dried and then fired in air at 1,450 ° C.
  • powder purity: 99.6%, average particle size: 55 ⁇ m
  • a sample having an extrusion length of 30 mm for measuring the thermal conductivity in the X direction and a 20 mm extrusion length for measuring the thermal conductivity in the Z direction was also prepared.
  • the thickness of the thin wall after firing was 0.4 mm
  • the cell pitch in the X and Y directions was 5 mm
  • the aperture ratio was 0.85.
  • a paste made by adding an appropriate amount of water and a binder to the same mixture of clay and alumina as the honeycomb structure on one end face of the honeycomb structure was press-fitted uniformly about 5 mm from one side, dried and sealed.
  • alumina powder was filled into the container formed in the gap between the thin walls from the opening on the opposite side with the sealed surface down.
  • the alumina powder used was coarse alumina with an alumina purity of 99.6%, an average particle size of 75 ⁇ m, a specific surface area of 0.6 m 2 / g, a bulk density of 1 g / cc when filled, and a ceramic volume fraction of 0.25. Met.
  • a paste made by adding an appropriate amount of water and a binder to the same clay and alumina mixture as the honeycomb structure at the opening end portion was pressed uniformly about 5 mm from one side, dried and sealed. .
  • the honeycomb structure thus obtained was fired in the atmosphere at 1,400 ° C. for 3 hours, and 100 mm ⁇ 100 mm ⁇ 100 mm, 100 mm ⁇ 100 mm ⁇ 30 mm, 100 mm ⁇ 100 mm ⁇ 20 mm block composite heat insulating materials were produced.
  • the thin wall portion made of mullite had a porosity of 30% and a thermal conductivity of 2.5 W / m ⁇ K at room temperature.
  • the thermal conductivity (room temperature) of the ceramic powder portion is 0.05 (W / M ⁇ K). Since the thermal conductivity (room temperature) of the thin wall 12 is 2.5 (W / m ⁇ K), the thermal conductivity in the direction of the arrow X in the third composite heat insulating material 10C is calculated from the equation (6) in the Z direction. The thermal conductivity of was determined from equation (3).
  • one cell was cut out from a sample with a length of 30 mm in the Z direction, processed to a 30 mm square, and the thermal conductivity was measured by a laser flash method.
  • the heat conductivity in the Z direction is cut out from the sample with a thickness of 20 mm in the Z direction by machining about 30 mm square parts for 6 cells in the X and Y directions, and the plugged portions are cut off from the upper and lower surfaces in the Z direction.
  • the thickness of the part was finished so as to be about 1 mm, and the thermal conductivity was measured by a laser flash method.
  • Example 4 A commercial product (Ceralek) having a cordierite composition (2MgO ⁇ 2Al 2 O 3 ⁇ 5SiO 2 ) was used as the honeycomb structure.
  • the size of the honeycomb after firing is a honeycomb structure in which the X direction and the Y direction are 100 mm ⁇ 100 mm and the Z direction is 50 mm, the thin wall thickness is 0.9 mm, and the cell pitch in the X direction and the Y direction is 5.9 mm.
  • the aperture ratio was 0.72.
  • the raw paste (a mixture of talc, kaolin, alumina, and silica) having the same cordierite composition as that of the honeycomb structure was previously press-sealed uniformly about 5 mm from one side at one opening end face of the honeycomb structure, The opening on one side of the fired honeycomb structure was sealed.
  • alumina powder was filled into the container formed in the gap between the thin walls from the opening on the opposite side with the sealed surface down.
  • the alumina powder used was coarse alumina with an alumina purity of 99.6%, an average particle size of 75 ⁇ m, a specific surface area of 0.6 m 2 / g, a bulk density of 1 g / cc when filled, and a ceramic volume fraction of 0.25. Met.
  • the alumina powder was filled about 5 mm lower than the upper end of the opening, and after filling, a raw paste having the same cordierite composition as the honeycomb structure was pressed into the end of the honeycomb uniformly from one side, dried and sealed.
  • the honeycomb structure thus obtained was fired in the air at 1,350 ° C. for 3 hours to produce a block-shaped composite heat insulating material of 100 mm ⁇ 100 mm ⁇ 50 mm.
  • the thin wall portion made of cordierite had a porosity of 45%, and the thermal conductivity of this honeycomb wall was 1.3 W / m ⁇ K at room temperature and 1.0 W / m ⁇ K at 800 ° C.
  • the actual insulation performance at high temperature of the composite insulation material in which the cordierite honeycomb was filled with alumina powder was evaluated by the following method.
  • a box test firing furnace 40 having a front opening size of width 282 mm, height 200 mm and depth 400 mm is prepared.
  • Two first seralek honeycomb materials 42A having an X direction and a Y direction of 120 mm ⁇ 48 mm and a height of 200 mm in the Z direction, and two second seracle honeycomb materials 42A having an X direction and a Y direction of 42 mm ⁇ 48 mm and a Z direction of 75 mm
  • the REC honeycomb material 42B was covered with one third Ceralek honeycomb 42C) having 42 mm ⁇ 48 mm in the X and Y directions and 50 mm in the Z direction.
  • the first Ceralek honeycomb 42A to the third Cerarec honeycomb 42C are not filled with an alumina material.
  • the surface temperature of the third Ceralek honeycomb 42C (42 mm ⁇ 48 mm ⁇ 50 mm) installed in the center was 282 ° C.
  • a B-class fireproof insulating brick (made by Isolite, catalog thermal conductivity 0.39 W / m ⁇ K or less) cut out to 42 mm ⁇ 48 mm ⁇ 50 mm
  • the surface temperature of the class B fireproof heat insulating brick installed at the center was 266 ° C.
  • a composite heat insulating material in which the third Ceralek honeycomb 42C is filled with alumina powder is cut into 42 mm ⁇ 48 mm in the X and Y directions and 50 mm in the Z direction.
  • the surface temperature of the composite heat insulating material installed at the center was 244 ° C.
  • the ceramic powder filled in the honeycomb structure space suppresses heat transfer due to convection by interfering with the gas flow.
  • heat transfer by radiation accounts for a large proportion at high temperatures, but in such powders, light is scattered between particles, so that heat transfer by radiation can also be suppressed.
  • this embodiment can provide a composite heat insulating material that can be manufactured at low cost, can be easily assembled, and has a thermal conductivity of less than 1.0 (W / m ⁇ K).
  • the thermal conductivity room temperature
  • the thermal conductivity (room temperature) can be 0.06 to 0.55 (W / m ⁇ K), which is one digit lower than that of refractory bricks.
  • the heat radiation direction and the first direction are substantially matched.
  • the heat radiation direction and the second direction may be substantially matched.
  • the cross-sectional shape when the honeycomb structure 16 is cut in a direction orthogonal to the axial direction as in the second composite heat insulating material 10B and the third composite heat insulating material 10C, a plurality of shapes are obtained. If the thin walls 12 are combined in a lattice shape, the overall strength will be high, so that there is no concern that the composite heat insulating material will collapse after assembly by assembling it in a portion where stress is concentrated. In particular, if the angle of the grid-like intersection is approximately 90 °, the heat conductivity does not depend on the assembling direction, so that it is possible to assemble without worrying about the directionality.
  • composite heat insulating material according to the present invention is not limited to the above-described embodiment, but can of course have various configurations without departing from the gist of the present invention.

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  • Mechanical Engineering (AREA)
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Abstract

La présente invention se rapporte à un matériau composite thermo-isolant dont la production est peu coûteuse, qui est facilement incorporé dans un ensemble et, en outre, présente une conductivité thermique inférieure à 1,0 (W/m·K). Le matériau composite thermo-isolant comprend : une structure en nid d'abeilles en forme de tube rectangulaire (16) ayant de nombreux espaces de logement (14) qui sont séparés les uns des autres par de fines parois (12) ; et une poudre de céramique (18) remplissant l'intérieur des espaces de logement respectifs (14) de la structure en nid d'abeilles (16). Alors que les faces latérales de la structure en nid d'abeilles (16) sont recouvertes par des parois externes (20) (par exemple, des parois composées d'un matériau similaire à celui des fines parois (12)), les faces supérieure et inférieure de cette dernière sont recouvertes par des couches colmatantes (22). Une forme en coupe transversale de la structure en nid d'abeilles (16) prise le long d'une direction perpendiculaire à l'axe de cette dernière est une forme dont les multiples fines parois (12) sont disposées parallèlement les unes aux autres.
PCT/JP2010/069561 2009-11-11 2010-11-04 Matériau composite thermo-isolant WO2011058916A1 (fr)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015155716A (ja) * 2014-02-20 2015-08-27 京セラ株式会社 断熱用部材

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5821605U (ja) * 1981-08-03 1983-02-10 ミサワホ−ム株式会社 断熱材内蔵パネル
GB2347440A (en) * 1999-02-12 2000-09-06 Ams Admatsys Limited Insulating panel with a honeycomb core filled with granular ceramic material

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5821605U (ja) * 1981-08-03 1983-02-10 ミサワホ−ム株式会社 断熱材内蔵パネル
GB2347440A (en) * 1999-02-12 2000-09-06 Ams Admatsys Limited Insulating panel with a honeycomb core filled with granular ceramic material

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015155716A (ja) * 2014-02-20 2015-08-27 京セラ株式会社 断熱用部材

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