WO2017204061A1 - セラミックス格子体 - Google Patents

セラミックス格子体 Download PDF

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Publication number
WO2017204061A1
WO2017204061A1 PCT/JP2017/018582 JP2017018582W WO2017204061A1 WO 2017204061 A1 WO2017204061 A1 WO 2017204061A1 JP 2017018582 W JP2017018582 W JP 2017018582W WO 2017204061 A1 WO2017204061 A1 WO 2017204061A1
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WIPO (PCT)
Prior art keywords
filament
ceramic
linear
ceramic lattice
linear portion
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PCT/JP2017/018582
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English (en)
French (fr)
Japanese (ja)
Inventor
哲宗 黒村
峻 有馬
光司 本田
Original Assignee
三井金属鉱業株式会社
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Application filed by 三井金属鉱業株式会社 filed Critical 三井金属鉱業株式会社
Priority to CN201780014000.9A priority Critical patent/CN108698942B/zh
Priority to KR1020187026878A priority patent/KR102366481B1/ko
Publication of WO2017204061A1 publication Critical patent/WO2017204061A1/ja

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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
    • 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
    • F27D5/00—Supports, screens, or the like for the charge within the furnace
    • F27D5/0006—Composite supporting structures
    • F27D5/0012—Modules of the sagger or setter type; Supports built up from them
    • 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
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
    • C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
    • C04B41/5025—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials with ceramic materials
    • C04B41/5042—Zirconium oxides or zirconates; Hafnium oxides or hafnates
    • 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
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/80—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only ceramics
    • C04B41/81—Coating or impregnation
    • C04B41/85—Coating or impregnation with inorganic materials
    • C04B41/87—Ceramics
    • 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
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/12—Travelling or movable supports or containers for the charge
    • 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
    • F27D5/00—Supports, screens, or the like for the charge within the furnace
    • F27D5/0031—Treatment baskets for ceramic articles

Definitions

  • an object of the present invention is to provide a ceramic lattice body that can eliminate the various drawbacks of the above-described prior art.
  • the present invention also includes a plurality of first filaments made of ceramics extending in one direction, and a plurality of second filaments made of ceramics extending in a direction intersecting the first filaments.
  • a ceramic lattice body having The intersection of the first filament part and the second filament part has the second filament part arranged on the first filament part in any of the intersection parts,
  • the first striated portion has a shape in which a cross section thereof is configured by a straight portion and a convex curved portion having both ends of the straight portion as ends in a portion other than the intersecting portion.
  • a ceramic lattice body (hereinafter also simply referred to as “lattice body”) 1 shown in these drawings has a plurality of first filament portions 10 made of ceramics extending in one direction X. Each 1st filament part 10 is carrying out the straight line, and is mutually extended in parallel.
  • the ceramic lattice body 1 has a plurality of ceramic second linear portions 20 extending in the Y direction, which is a direction different from the X direction. Each of the second linear portions 20 is straight and extends in parallel with each other.
  • the ceramic lattice body 1 forms a lattice when the first linear portion 10 and the second linear portion 20 intersect, and has a plate-like shape having a plurality of through holes 3 defined by the lattice. is doing.
  • the ceramic lattice body 1 has the 1st surface 1a and the 2nd surface 1b facing this as shown in FIG.
  • the 1st line part 10 has fixed width W1 (refer to Drawing 2) in plane view in positions other than intersection part 2 of both line item parts 10 and 20.
  • the first linear portion 10 has a cross-sectional shape along the thickness direction in a direction orthogonal to the longitudinal direction, and is located on the first surface 1 a side of the ceramic lattice body 1.
  • the first surface 10a and the second surface 10b located on the second surface 1b side of the ceramic lattice body 1 are defined.
  • the first linear portion 10 has a straight portion 10A and both end portions of the straight portion 10A in a portion other than the intersecting portion 2 in a cross section along the thickness direction in a direction orthogonal to the longitudinal direction.
  • the second filament part 20 Similar to the first filament part 10, the second filament part 20 also has a certain width W2 (see FIG. 5) in plan view at a position other than the intersecting part 2 of the two filament parts 10, 20. Have.
  • the width W2 may be the same as or different from the width W1 of the first linear portion 10.
  • the second linear portion 20 has a cross-sectional shape along the thickness direction in a direction orthogonal to the longitudinal direction thereof, which is located on the first surface 1 a side of the ceramic lattice body 1.
  • the first surface 20a and the second surface 20b located on the second surface 1b side of the ceramic lattice 1 are defined.
  • the linear portion 10 ⁇ / b> A in the first linear portion 10 i.e., the first surface 10 a is placed on the plane P as a placement surface
  • all the first surfaces 10 a are all on the plane P.
  • the fact that each of the first surfaces 10a is all on the plane P means that the first surface 1a of the lattice body 1 is a flat surface. Means that Therefore, when the ceramic lattice body 1 is placed such that the first surface 1a is in contact with the flat placement surface, the entire area of the first surface 1a is in contact with the placement surface.
  • the second surface 1b of the ceramic lattice body 1 is composed of the second surface 20b of the second linear portion 20 having a convex curved shape as shown in FIG. The surface is uneven.
  • both linear portions 10 and 20 are integrated. “Integrated” means that, when the cross section of the intersecting portion 2 is observed, the space between the two linear portions 10 and 20 is a continuous structure as ceramics.
  • the through-holes 3 formed in the ceramic lattice 1 by the intersection of both the line portions 10 and 20 have the same dimensions and the same shape. Each through-hole 3 has a substantially rectangular shape. The through holes 3 are regularly arranged.
  • the thickness of the first filament 10 at a position other than the intersection 2 of the two filaments 10 and 20 is T1 (see FIG. 2), and the position of the both filaments 10 and 20 at a position other than the intersection 2.
  • T1 the thickness of the second linear portion 20
  • Tc the thickness at the intersecting portion
  • Tc the thickness of the intersecting portion between the two filament portions 10 and 20 is the highest.
  • the thickness Tc of the intersecting portion 2 is also the thickness of the ceramic lattice body 1.
  • the first line portion 10 has the highest position of the second surface 10 b in the first line portion 10, that is, the position of the top portion in the portion other than the intersecting portion 2. It is the same along the direction in which the strip 10 extends.
  • the highest position of the second surface 20b in the second striated portion 20 is the position of the intersecting portion 2 and the position other than the intersecting portion 2, They are in the same position along the direction in which the first linear portion 10 extends.
  • the lowest position of the first surface 20 a in the second linear portion 20 is the same position along the direction in which the second linear portion 20 extends in a portion other than the intersecting portion 2.
  • the ceramic lattice body 1 of the present embodiment is composed of one layer of the first linear portion 10 and one layer of the second linear portion 20, and the ceramic lattice body 1 has n layers.
  • the thickness T of the ceramic lattice body 1 is preferably 0.5 or more and 1.0 or less, more preferably 0.8 or more and 1.0 or less, with respect to (nT1 + mT2).
  • the point contact state is preferably in the range of 0.9 to 1.0.
  • the first linear portion 10 is projected in a plan view in a portion other than the intersecting portion 2 in which the width W1a of the projected image in the plan view in the intersecting portion 2 is. It is approximately the same as the image width W1b or slightly larger than W1b.
  • the first linear portion 10 has (i) the outline along the longitudinal direction of the projected image in plan view is substantially straight lines 11 and 11 at the intersecting portion 2, or (ii) the width. A very gentle convex curve (not shown) is drawn outward in the direction Y.
  • the contour along the longitudinal direction of the projection image in the plan view of the first linear portion 10 has the maximum width portion having the width W1a, and the width increases as the distance from the maximum width portion increases. It gradually decreases gradually, and becomes a width W1b at a position between the intersecting portions 2.
  • the width W1b is the same as the width W1 described above.
  • W1a is preferably 1 to 1.5 times W1, more preferably 1 to 1.3 times, and still more preferably 1 to 1.1 times W1b.
  • FIG. 8 shows a plan view of the ceramic lattice 1.
  • the grid body 1 has a plurality of first line sections 10 and a plurality of second line sections 20 substantially orthogonal to each other, so that the grid body has a substantially rectangular shape in plan view.
  • a plurality of through holes 3 are formed.
  • the substantially rectangular through-hole 3 has first sides 3a and 3a that are a pair of opposing sides.
  • the through-hole 3 has second sides 3b and 3b which are another set of sides facing each other.
  • the first sides 3 a and 3 a are sides corresponding to both side edges of the first linear portion 10.
  • the second sides 3 b and 3 b are sides corresponding to both side edges of the second linear portion 20.
  • the first surface 1a of the lattice body 1 having the above configuration is used as, for example, a setter for firing a body to be fired
  • the first surface 1a can be obtained by placing the body to be fired on the first surface 1a of the lattice body 1. Since it is a flat surface, it is suitable for mounting a fired body that requires flatness.
  • a to-be-fired body for which flatness is required for example, a small chip-shaped electronic component such as a multilayer ceramic capacitor can be cited. Since these small electronic components are required not to be caught by the setter in the firing process, it is advantageous that the first surface 1a of the lattice body 1 is flat.
  • the to-be-fired body contacts only the 1st filament part 10 which is the member which comprises the 1st surface 1a, the contact area of the lattice body 1 and a to-be-fired body reduces significantly, and is thereby fired It becomes easy to perform rapid heating and cooling of the body.
  • the lattice body 1 is formed by the intersection of the first and second linear portions 10 and 20 and the plurality of through holes 3 are formed, the heat capacity is small. Easy heating and cooling.
  • the lattice body 1 has good air permeability due to the presence of the plurality of through holes 3, this also facilitates rapid cooling of the fired body. Good air permeability becomes more remarkable by the fact that the second linear portion 20 floats between the adjacent intersecting portions 2.
  • the first and second linear portions 10 and 20 are integrated at the intersecting portion 2, so that the lattice body 1 has sufficient strength.
  • the second surface 1b is an uneven surface caused by the curved surface of the second linear portion 20, and the electronic component of this order size has an uneven surface on which it is placed. This is because it is advantageous from the viewpoint of enhancing the performance.
  • the lattice body 1 of the present embodiment has one surface that is flat and the other surface is an uneven surface, so that the mounting surface can be properly used according to the type of the body to be fired. This is advantageous.
  • the value of T1 is preferably 50 ⁇ m or more and 5 mm or less, and more preferably 200 ⁇ m or more and 2 mm or less.
  • the value of T2 is preferably 50 ⁇ m or more and 5 mm or less, and more preferably 200 ⁇ m or more and 2 mm or less.
  • the thickness Tc at the intersection 2 is preferably not less than 20 ⁇ m and not more than 5 mm, preferably not less than 5 ⁇ m and not more than 2 mm, with respect to (T1 + T2). More preferably, it is as follows.
  • an elliptical short axis corresponds to the thickness direction of the grid
  • the ratio of the major axis / minor axis is preferably 1 or more and 5 or less, and more preferably 1 or more and 3 or less.
  • the fact that the cross-sectional shape in the thickness direction of the second linear portion 20 is an ellipse or a circle contributes to an improvement in the strength of the lattice 1.
  • the through hole 3 formed in the ceramic lattice body 1 has an area of 100 ⁇ m 2 or more and 100 mm 2 or less, particularly 2500 ⁇ m 2 or more and 1 mm 2 or less, which reduces the heat capacity of the lattice body 1 and improves air permeability. This is preferable from the viewpoint of maintaining the strength of the grid body 1. Further, the ratio of the total area of the through holes 3 to the apparent area of the ceramic lattice 1 in plan view is preferably 1% or more and 80% or less, and more preferably 3% or more and 70% or less, More preferably, it is 10% or more and 70% or less.
  • This ratio is obtained by cutting the ceramic lattice body 1 into a rectangular shape in plan view, calculating the sum of the areas of the through holes 3 included in the rectangle, and dividing the sum by the rectangular area. Calculated by multiplying by Moreover, the area of each through-hole 3 can be measured by image analysis of the microscope observation image of the lattice 1.
  • the width W1 of the first linear portion 10 is preferably 50 ⁇ m or more and 10 mm or less, and more preferably 75 ⁇ m or more and 1 mm or less.
  • the width W2 of the second linear portion 20 is preferably 50 ⁇ m or more and 10 mm or less, and more preferably 75 ⁇ m or more and 1 mm or less.
  • the pitch P1 between the adjacent first linear portions 10 is preferably 100 ⁇ m or more and 10 mm or less, and 150 ⁇ m or more and 5 mm. More preferably, it is as follows.
  • the pitch P2 between the adjacent second linear portions 20 is preferably 100 ⁇ m or more and 10 mm or less, and more preferably 150 ⁇ m or more and 5 mm or less.
  • the surface roughness Ra of the first surface 10a of the first filament 10 is preferably 0.01 ⁇ m or more and 10 ⁇ m or less, and more preferably 0.01 ⁇ m or more and 5 ⁇ m or less.
  • the surface roughness Ra of the second surface 20b of the second linear portion 20 is preferably 5 ⁇ m or more and 100 ⁇ m or less, and more preferably 10 ⁇ m or more and 50 ⁇ m or less.
  • the surface roughness Ra is a cross-sectional curve scanned using a color 3D laser microscope (for example, VK-8710, manufactured by Keyence Corporation) with an imaging magnification of 200, in accordance with JIS B0601 (2001).
  • a color 3D laser microscope for example, VK-8710, manufactured by Keyence Corporation
  • JIS B0601 2001.
  • the second surface 20b of the second striated portion 20 the surface roughness was measured along the middle line of the second surface 20b, and an average value was calculated from the 20 measured values to be Ra.
  • the first surface 1a and / or the second surface 1b of the ceramic lattice body 1 may be polished and processed to have a predetermined surface roughness.
  • the ceramic material constituting the ceramic lattice body various materials can be used. Examples thereof include alumina, silicon carbide, silicon nitride, zirconia, mullite, zircon, cordierite, aluminum titanate, magnesium titanate, magnesia, titanium diboride, boron nitride and the like. These ceramic materials can be used singly or in combination of two or more. In particular, it is preferably made of a ceramic containing alumina, mullite, cordierite, zirconia or silicon carbide. In the case of using ceramics containing zirconia, zirconia that is completely stabilized by addition of yttria can be used in order to make the lattice body 1 more suitable for use in high-temperature firing.
  • the ceramic lattice body 1 When the ceramic lattice body 1 is subjected to rapid heating and cooling, it is particularly preferable to use silicon carbide as the ceramic material. In addition, since silicon carbide has a concern about a reaction with a to-be-fired body, when using silicon carbide as a ceramic material, it is preferable to coat the surface with a low-reactivity ceramic material such as zirconia. As the raw material powder of the ceramic material constituting the lattice body 1, it is preferable to use a powder having a particle size of 0.1 ⁇ m or more and 200 ⁇ m or less in consideration of the viscosity and ease of sintering when the paste is made.
  • the ceramic material constituting the first filament part 10 and the ceramic material constituting the second filament part 20 may be the same or different. From the viewpoint of increasing the integrity of the first and second linear portions 10 and 20 at the intersecting portion 2, it is preferable that the ceramic materials constituting both the linear portions 10 and 20 are the same.
  • the first linear portion 10 and the second linear portion 20 being in point contact at their intersecting portions 2, the first linear portion 10 and the first linear portion 10 It turns out that it is advantageous from the point of the further improvement of the intensity
  • the ceramic in which two or more crystal phases are mixed means that a ceramic made of a single material has two or more crystal phases. There are no particular restrictions on the type of two or more crystal phases.
  • each of the first linear portion 10 and the second linear portion 20 is made of partially stabilized zirconia in which tetragonal crystals and cubic crystals are mixed, and This is advantageous from the standpoint of further improving the spalling resistance.
  • yttria may be added to zirconia. The added amount of yttria may be more than 0 mol% and less than 8 mol% with respect to the total number of moles of Zr and Y.
  • raw material powder of a ceramic material is prepared, and the raw material powder is mixed with a medium such as water and a binder to prepare a paste for manufacturing a filament portion.
  • the binder As the binder, the same ones conventionally used for this type of paste can be used. Examples include polyvinyl alcohol, polyethylene glycol, polyethylene oxide, dextrin, sodium lignin sulfonate and ammonium, carboxymethylcellulose, ethylcellulose, hydroxypropylmethylcellulose, carboxymethylcellulose, hydroxyethylcellulose, hydroxyethylmethylcellulose, sodium and ammonium alginate, epoxy resin, phenol Resins, gum arabic, polyvinyl butyral, acrylic polymers such as polyacrylic acid and polyacrylamide, thickening polysaccharides such as xanthan gum and guar gum, gelling agents such as gelatin, agar and pectin, vinyl acetate resin emulsion, wax emulsion, And inorganic binders such as alumina sol and silica sol Etc., and the like. Two or more of these may be mixed and used.
  • the viscosity of the paste is preferably high at the temperature at the time of application from the viewpoint that the lattice body 1 having the structure of this embodiment can be successfully manufactured.
  • the viscosity of the paste is preferably 1.5 MPa ⁇ s or more and 5.0 MPa ⁇ s or less, preferably 1.7 MPa ⁇ s or more and 3.0 MPa ⁇ s or less, at the temperature at the time of application. preferable.
  • a measured value at 4 minutes after the start of measurement was used at a rotation speed of 0.3 rpm using a cone plate type rotary viscometer or a rheometer.
  • the ratio of the raw material powder of the ceramic material in the paste is preferably 20% by mass to 85% by mass, and more preferably 35% by mass to 75% by mass.
  • the ratio of the medium in the paste is preferably 15% by mass to 60% by mass, and more preferably 20% by mass to 55% by mass.
  • the proportion of the binder in the paste is preferably 1% by mass or more and 40% by mass or less, and more preferably 5% by mass or more and 25% by mass or less.
  • the paste can contain a thickener, a flocculant, a thixotropic agent, etc. as a viscosity modifier.
  • thickeners include polyethylene glycol fatty acid esters, alkylallyl sulfonic acids, alkyl ammonium salts, ethyl vinyl ether / maleic anhydride copolymers, fumed silica, albumin and other proteins.
  • the binder may be classified as a thickener because it has a thickening effect. However, if more precise viscosity adjustment is required, a thickener that is not classified separately as a binder. An agent can be used.
  • flocculant examples include polyacrylamide, polyacrylic acid ester, aluminum sulfate, and polyaluminum chloride.
  • thixotropic agents include fatty acid amides, oxidized polyolefins, polyether ester type surfactants, and the like.
  • a solvent for preparing the paste in addition to water, alcohol, acetone, ethyl acetate, and the like are used, and two or more of these may be mixed.
  • a plasticizer, a lubricant, a dispersant, a sedimentation inhibitor, a pH adjuster, or the like may be added.
  • plasticizer examples include glycols such as trimethylene glycol and tetramethylene glycol, glycerin, butanediol, phthalic acid, adipic acid, and phosphoric acid.
  • lubricant examples include hydrocarbons such as liquid paraffin, micro wax, and synthetic paraffin, higher fatty acids, fatty acid amides, and the like.
  • dispersant examples include sodium polycarboxylate or ammonium salt, acrylic acid type, polyethyleneimine, and phosphoric acid type.
  • precipitation inhibitor examples include polyamide amine salts, bentonite, and aluminum stearate.
  • pH adjusting agent examples include sodium hydroxide, aqueous ammonia, oxalic acid, acetic acid, hydrochloric acid and the like.
  • the filament first coating body corresponds to the first filament portion 10 in the target lattice body 1.
  • the 1st paste which is a paste used for formation of the filament 1st coated object contains the 1st raw material powder of the ceramic material mentioned above, a medium, and a binder.
  • Various application apparatuses such as a small extruder and a printing machine can be used for forming the first filament coated body using the first paste.
  • the medium is then removed from the filament first coated body and dried to perform an operation of further increasing the viscosity of the filament first coated body.
  • hot air may be blown to the filament first coated body or infrared rays may be irradiated.
  • the proportion of the medium in the first filament coated body after the medium is removed is preferably reduced to 50% by mass or less, more preferably 30% by mass or less, and the viscosity of the first filament coated body is extremely low. It becomes expensive and its shape retention is further enhanced.
  • the second paste is then used so that the plurality of filament second coated bodies are parallel to each other so as to intersect the first filament coated body. And it forms in linear form.
  • the filament second coated body corresponds to the second filament portion 20 in the target lattice body 1.
  • a 2nd paste the thing of the composition similar to a 1st paste can be used, The 2nd raw material powder of a ceramic material, a medium, and a binder are included.
  • a coating device similar to the first filament coated body can be used.
  • the medium is then removed from the filament second coated body and dried, and an operation for further increasing the viscosity of the filament second coated body is performed.
  • This operation can be performed in the same manner as the operation performed on the filament first coated body. In this way, the formation of the linear first coated body and the removal of the medium, and the formation of the linear second coated body and the removal of the medium are sequentially performed, so that the second on the first linear portion 10.
  • the lattice body 1 in which the linear portion 20 is located can be successfully obtained.
  • the thus obtained lattice-shaped precursor is peeled off from the substrate and placed in a firing furnace for firing.
  • the target ceramic lattice 1 is obtained by this firing. Baking can generally be performed in air.
  • the firing temperature may be selected appropriately depending on the type of raw material powder of the ceramic material. The same applies to the firing time.
  • This ceramic lattice body 1 can be suitably used as a setter for degreasing or firing ceramic products such as shelf boards and floorboards, and can also be used as a kiln tool other than a setter, such as a firewood or beam. Furthermore, it can also be used as various jigs and various structural materials such as filters and catalyst carriers other than kiln tools.
  • the ceramic lattice body 1A of the embodiment shown in FIGS. 9 to 14 is also provided.
  • the ceramic lattice body 1A will be described with respect to points different from the ceramic lattice body 1 described above, and the description regarding the ceramic lattice body 1 described above is appropriately applied to points that are not particularly described.
  • 9 to 14 the same members as those in FIGS. 1 to 8 are denoted by the same reference numerals.
  • the ceramic lattice body 1 ⁇ / b> A has a projected image in a plan view of the second linear portion 20 that is curved and bulging outward in the width direction X at the intersecting portion 2. It has a shape.
  • the width W2a of the projected image at the intersection 2 is larger than the width W2b of the projection image at a portion other than the intersection 2.
  • the second linear portion 20 has curved contours 21, 21 whose contours along the longitudinal direction of the projected image in plan view are gently convex outward in the width direction X at the intersection 2. I'm drawing.
  • the contour along the longitudinal direction of the projected image in plan view of the second linear portion 20 has a maximum width portion having a width W2a, and the width gradually decreases gradually as the distance from the maximum width portion increases.
  • the width is W2b at the position between the intersections 2.
  • the width W2b is the same as the width W2 described above.
  • the projected image in the plan view of the first linear portion 10 bulges outward in the width direction Y at the intersecting portion 2. It has a shape.
  • the width W1a of the projection image at the intersection 2 is larger than the width W1b of the projection image at a portion other than the intersection 2.
  • the first linear portion 10 has gently convex curves 11 and 11 whose contours along the longitudinal direction of the projected image in plan view are gradually outward in the width direction Y at the intersection 2. I'm drawing.
  • the outline along the longitudinal direction of the projected image of the first linear portion 10 in plan view has a maximum width portion having a width W1a, and the width gradually decreases gradually as the distance from the maximum width portion increases.
  • the width is W1b at the position between the intersections 2.
  • the width W1b is the same as the width W1 described above.
  • FIG. 14 shows a plan view of the ceramic lattice 1A.
  • the grid body 1 has a plurality of first line sections 10 and a plurality of second line sections 20 substantially orthogonal to each other, so that the grid body has a substantially rectangular shape in plan view.
  • a plurality of through holes 3 are formed.
  • the substantially rectangular through-hole 3 has first sides 3a and 3a that are a pair of opposing sides.
  • the through-hole 3 has second sides 3b and 3b which are another set of sides facing each other.
  • the first sides 3 a and 3 a are sides corresponding to both side edges of the first linear portion 10.
  • the second sides 3 b and 3 b are sides corresponding to both side edges of the second linear portion 20.
  • the through hole 3 is defined by these four sides.
  • the opposing first sides 3a, 3a are straight and extend parallel to each other.
  • the opposing second sides 3b, 3b are straight and extend parallel to each other.
  • the through-hole 3 formed by being substantially orthogonal to 20 has a corner portion 30 that is not a right-angled rectangle, but a corner portion 30 that is slightly rounded as shown in the schematic view of FIG.
  • the corner 30 of the rectangular through hole 3 is rounded, resulting in strength and strength. Improved spalling resistance. This is because the portion of the ceramic lattice 1A where defects such as cracks are most likely to occur is the corner 30 of the through-hole 3, and the corner 30 is rounded. This is because cracks and the like are hardly generated in the corner 30. In contrast to this, for example, in the kiln tool plate having the opening described in Patent Document 2 described above, the corners of the opening are at right angles, so that cracks and the like are likely to occur.
  • the above-described improvement in strength and spalling resistance is obtained by projecting at least the second linear portion 20 in a plan view at the intersection 2 between the first linear portion 10 and the second linear portion 20. If the above-mentioned convex curve 21 is included in the contour along the longitudinal direction, the above-mentioned is achieved sufficiently. In particular, when both the first linear portion 10 and the second linear portion 20 have the convex curves 11 and 21 on the contour along the longitudinal direction of the projected image in plan view, Strength and spalling resistance are further improved.
  • the ceramic lattice body 1A can be manufactured by the same method as the ceramic lattice body 1 described above. However, in the production of the ceramic lattice body 1 described above, an operation for removing the medium was performed after the formation of the first filament body and the second coating body, but in the production of the ceramic lattice body 1A, It is not necessary to perform this medium removal operation. As a result, at the intersection of the filament first coated body and the filament second coated body, the filament second coated body moderately sinks into the filament first coated body, thereby The side edges of the coated body bulge out toward the outside in the width direction.
  • a paste having a relatively low viscosity can be used.
  • the lattice precursor is dried to remove a liquid component, It is preferable to perform firing after increasing the shape retention of the lattice precursor.
  • the viscosity is preferably 10 kPa ⁇ s or more and 1.5 MPa ⁇ s or less, and 0.5 MPa ⁇ s or more and 1.3 MPa ⁇ s or less at the temperature during application. More preferably.
  • a lattice-shaped precursor formed by two types of filament coated bodies is obtained.
  • the viscosity of the paste used for producing the lattice precursor is relatively low, it is preferable to dry the lattice precursor to develop shape retention.
  • the second coated body of the filaments is prevented from excessively sinking into the first coated body of the filaments, and the side edges of these coated bodies are appropriately curved and expanded toward the outside in the width direction. Put out.
  • a filament 2nd coating body bends downward with dead weight between adjacent intersections, and the bridging state of a filament 2nd coating body is maintained. Drying is performed, for example, by heating the lattice precursor at a temperature of 40 ° C. or higher and 80 ° C.
  • the heating time can be, for example, 0.5 hours or more and 12 hours or less.
  • the first linear portion 10 and the second linear portion 20 intersect so as to be substantially orthogonal to each other, but the two linear portions 10 and 20 intersect.
  • the angle is not limited to 90 degrees.
  • the ceramic lattice bodies 1 and 1A of the said embodiment used the two types of line
  • the linear portions subsequent to the third linear portion are the first and second linear portions as described above with respect to the thickness T1, the width W1, and the pitch P1, respectively. It is desirable to have the same configuration as Also, the configuration of the intersection formed by the linear portions after the third linear portion may have the same configuration as the intersection formed by the first and second linear portions as described above. desirable.
  • the ceramic lattice bodies 1 and 1A of the above embodiment have a single-layer structure, but instead of this, a plurality of the lattice bodies 1 are used, for example, in FIGS. 15 (a) and 15 (b). As shown, a plurality of layers may be laminated.
  • a first lattice body 1 ′ composed of a first linear portion 10 ′ and a second linear portion 20 ′, a first linear portion 10 ′′ and a second linear portion 10 ′.
  • the first line portion 10 ′ in the first lattice body 1 ′ and the second lattice body 1 ′ are formed.
  • the first filament 10 ′ in the first grid 1 ′ and the first filament 10 ′′ in the second grid 1 ′′ are half pitch. It is arranged so as to be displaced.
  • the second filament 20 'in the first grid 1' and the second filament 20 "in the second grid 1" are arranged so as to be shifted by a half pitch.
  • the first filament portion 10 ′ and the second filament portion 20 in the first lattice body 1 ′ are at their intersection.
  • any pair of linear portions adjacent to each other in the vertical direction are in point contact at their intersecting portions.
  • ceramic lattice bodies 1 and 1A of the embodiment shown in FIG. 16 have a plurality of third ceramics extending in one direction, in addition to having the first linear portion 10 and the second linear portion. It further has a line portion 33.
  • the direction in which the third linear portion 33 extends is the same as the direction in which the first linear portion 10 extends, but instead, the third linear portion 33 is: An oblique direction (specifically, preferably larger than ⁇ 45 ° and smaller than 45 °, more preferably larger than ⁇ 45 ° and 30 ° with respect to the direction in which the first filament 10 extends. It may be inclined to be smaller.
  • the third striated portion 33 intersects the second striated portion 20, and the intersecting portion between the third striated portion 33 and the second striated portion 20 is in any of the intersecting portions.
  • the third filament part 33 is arranged on the second filament part 20.
  • the third linear portion 33 is arranged so as to be shifted from the arrangement pitch of the first linear portion 10 by a half pitch (0.5 pitch).
  • This embodiment is the most preferable mode for preventing the electronic component from dropping from the linear portion when the electronic component is placed and fired.
  • the present invention is not limited to this embodiment, and the deviation between the first linear portion 10 and the third linear portion 33 is zero (0) or more and half as long as the object of the present invention is not impaired.
  • a range less than the pitch (0.5 pitch) can be taken.
  • the same effects as those of the ceramic lattice bodies 1 and 1A of the previous embodiments are exhibited.
  • the third filament part 33 and the second filament part 20 are the same in the third filament part. It is preferable that only the downwardly convex top portion of the circular or elliptical shape is in contact with the upward convex top portion of the circular or elliptical shape of the second linear portion.
  • an outer frame may be provided on the outer periphery of the lattice bodies 1 and 1A.
  • the outer frame may be integrally formed from the same material as the lattice bodies 1 and 1A, or may be manufactured separately from the lattice bodies 1 and 1A and joined by a predetermined joining means.
  • a slit is made inward in the width direction in a part of the side along the longitudinal direction of the first linear portion 10 and / or the second linear portion 20. May be.
  • each linear portion in the ceramic lattice body 1 of each embodiment is an aspect in which an end portion thereof is exposed, in other words, a reinforcement composed of a frame body on the outer edge of the ceramic lattice body 1.
  • An embodiment in which no material is present is more preferable.
  • Example 1 In this example, the ceramic lattice body 1 shown in FIGS. 1 to 8 was manufactured.
  • a filament first coated body was formed on a resin substrate using the above paste as a raw material and a dispenser having a nozzle having a diameter of 0.4 mm. Next, hot air was blown onto the filament first coated body using a dryer to remove water, and the filament first coated body was dried. The water content of the filament first coated body after drying was 10%. Subsequently, the filament 2nd coating body which cross
  • the width W1 of the first filament part was 425 ⁇ m, and the width W2 of the second filament part was 420 ⁇ m.
  • the width W1a of the first filament portion at the intersecting portion was 445 ⁇ m, and the width W2a of the second filament portion was 440 ⁇ m. Therefore, W2a was 1.05 times W2b, and W2a and W2b were substantially the same value.
  • the pitch P1 of the 1st filament part was 800 micrometers, and the pitch P2 of the 2nd filament part was 720 micrometers.
  • the surface roughness Ra of the ceramic lattice 1 was 0.3 ⁇ m on the first surface and 0.4 ⁇ m on the second surface.
  • the area of the through holes in the ceramic grid 1 is 0.09 mm 2, the hole area ratio was 17%.
  • Example 2 In this example, a ceramic lattice 1A shown in FIGS. 9 to 14 was manufactured.
  • a paste for forming a linear coated body 65.3 parts of 8 mol% yttria-added fully stabilized zirconia powder having an average particle diameter of 0.8 ⁇ m, and hydroxypropyl methylcellulose (average polymerization degree: 30) as an aqueous binder 10 g / mol) 5.0 parts, 2.5 parts of glycerin as a plasticizer, 1.1 parts of a polycarboxylic acid-based dispersant (molecular weight 12000) and 26.1 parts of water are mixed and defoamed.
  • a paste was prepared. The viscosity of the paste was 2.3 MPa ⁇ s at 25 ° C.
  • a linear first coated body is formed on a resin substrate using a dispenser having a nozzle having a diameter of 0.4 mm, and then the linear strip intersects with it. A second coated body was formed. The crossing angle between the two filament coated bodies was 90 degrees. Thus, a lattice precursor was obtained.
  • (3) Firing step After the dried lattice precursor was peeled from the resin substrate, it was placed in an atmospheric firing furnace. Degreasing and firing were performed in this firing furnace to obtain a ceramic lattice body having the shape shown in FIGS. The firing temperature was 1450 ° C., and the firing time was 3 hours. The specifications of the obtained lattice are shown in Table 1 below. In the obtained lattice body, as shown in FIG. 14, the corners of the rectangular through holes were rounded.
  • Example 3 A ceramic lattice was obtained in the same manner as in Example 2 except that the nozzle diameter was 0.8 mm. In the obtained lattice body, as shown in FIG. 14, the corners of the rectangular through holes were rounded.
  • Example 4 83.6% yttria-added fully stabilized zirconia powder having an average particle size of 0.8 ⁇ m, hydroxypropyl methylcellulose (average polymerization degree: 300,000 g / mol) as an aqueous binder, 4.1 parts, and plasticizer Then, 2.0 parts of glycerin, a polycarboxylic acid-based dispersant (molecular weight 12000), and 39.4 parts of water were mixed and defoamed to prepare a paste. The viscosity of the paste was 1.15 million Pa ⁇ s at 25 ° C. Using this paste, a lattice precursor was obtained by the same operation as in Example 1. However, the nozzle diameter was 0.4 mm.
  • a coated body was formed with a dispenser while drying the lattice-shaped precursor with a dryer. Further, after the coated body was formed, the coated body was dried with a dryer at 60 ° C. for 12 hours.
  • a ceramic lattice body was obtained in the same manner as in Example 2 except for this. In the obtained lattice body, as shown in FIG. 14, the corners of the rectangular through holes were rounded.
  • Example 5 In Example 4, the nozzle diameter was 0.8 mm. A ceramic lattice was obtained in the same manner as in Example 3 except for this. In the obtained lattice body, as shown in FIG. 14, the corners of the rectangular through holes were rounded.
  • Example 6 In Example 2, four types of line sections were used. The four types of line sections were stacked in the order of the first line section, the second line section, the third line section, and the fourth line section. The strips adjacent to each other at the top and bottom intersect at 90 degrees. The position of the intersection produced by the intersection of the first filament and the second filament is the position of the filament produced by the intersection of the second filament and the third filament, and in plan view. I tried to be the same. The same applies to the intersection of the second and third filaments and the intersection of the third and fourth filaments. A ceramic lattice body was obtained in the same manner as in Example 2 except for this. In Table 1 showing the specifications, the thickness, width, and pitch between the linear portions of the third linear portion are shown as T3, W3, and P3, respectively.
  • variety, and the pitch between filament parts were shown as T4, W4, and P4, respectively.
  • the first surface of the ceramic lattice body is the outer surface of the first striated portion
  • the second surface is the surface of the fourth striated portion.
  • the corners of the rectangular through holes were rounded.
  • This comparative example is an example using a nickel net as a lattice.
  • This nickel mesh is obtained by applying a zirconia spray coating to 32 mesh formed by plain weaving of a nickel wire having a thickness of 315 ⁇ m, and has a thickness of 0.6 mm.
  • a sample having a length of 150 mm, a width of 150 mm, and a thickness of 0.8 to 1.5 mm was prepared.
  • a rack-shaped kiln tool with mullite foot (external dimension is 165 mm x 165 mm, cross-shaped width in the center is 15 mm, and there are four hollow structures of 60 mm x 60 mm between the outer frame and the cross) Place the sample on the base plate, set the sample on the rack, heat at high temperature in an atmospheric baking furnace and hold it at a desired temperature for 1 hour or more, then remove it from the electric furnace and expose it to room temperature. The presence or absence of warpage and cracking was evaluated. The set temperature was changed from 200 ° C. to 1100 ° C. while increasing the temperature by 50 ° C., and the upper limit of the temperature at which cracking did not occur was defined as the “endurance temperature upper limit value”.
  • the ceramic lattice of the present invention has high strength and excellent spalling resistance.

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WO2024034257A1 (ja) * 2022-08-08 2024-02-15 三井金属鉱業株式会社 セッターと敷板とからなる焼成治具
JP7506842B1 (ja) 2022-08-08 2024-06-26 三井金属鉱業株式会社 セッターと敷板とからなる焼成治具

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JP7244808B2 (ja) * 2019-12-03 2023-03-23 株式会社村田製作所 チップ状電子部品用セッター
CN111043862B (zh) * 2019-12-24 2020-11-03 浙江峰邦机械科技有限公司 一种变电站用绝缘瓷质套管烧结成型固定支架
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