WO2018066281A1

WO2018066281A1 - Ceramic lattice

Info

Publication number: WO2018066281A1
Application number: PCT/JP2017/031646
Authority: WO
Inventors: 哲宗黒村; 峻有馬; 光司本田
Original assignee: 三井金属鉱業株式会社
Priority date: 2016-10-06
Filing date: 2017-09-01
Publication date: 2018-04-12
Also published as: TW201823185A; KR102227122B1; JP6284693B1; CN109689594B; JPWO2018066281A1; KR20190058470A; CN109689594A; TWI780068B

Abstract

A ceramic lattice (1) comprises a plurality of first linear parts (10) and a plurality of second linear parts (20). At every intersection between the first linear parts (10) and the second linear parts (20), a second linear part (20) is provided on and above a first linear part (10). The ceramic lattice (1) has straight-line side portions (L1), (L2) in at least a portion of the contour of the ceramic lattice (1) as viewed from above. The first linear parts (10) and the second linear parts (20) each independently intersect the straight-line side portions (L1), (L2) at angles of 10-170 degrees.

Description

Ceramic lattice

The present invention relates to a ceramic lattice.

When firing ceramic electronic parts and glass, it is common to place the object to be fired on a setter, also called a shelf board or a floor board, and perform firing. In order to shorten the degreasing and firing time of the material to be fired and increase the number of products manufactured per unit time, it is necessary to rapidly heat and cool the firing process. When heated and / or rapidly cooled, defects such as cracks are likely to occur. Moreover, it becomes easy to produce defects, such as a crack, by repeated use. In addition, it has been pointed out that when a metal setter is used, it cannot be used in an oxidizing atmosphere, and when it is repeatedly used in a high temperature region of 1200 ° C. or more, it is greatly deformed.

As a conventional technology related to ceramic setters, for example, a heat setter setter made of a porous plate made of ceramics mainly composed of aluminum nitride and having a large number of holes penetrating the front and back is known (Patent Literature). 1). According to this document, by using aluminum nitride as ceramics, the maximum usable temperature is higher than that of oxide ceramics typified by alumina and magnesia, and the thermal conductivity is large. The resistance to heat shock is said to increase.

Patent Document 2 describes a ceramic firing kiln tool plate in which at least uneven shapes are provided on the front surface side and the back surface side on which the object to be fired is placed and an opening is formed. According to this document, according to this kiln tool plate, the heat capacity can be reduced and the cost can be reduced, and the contact area with the fired product is reduced, so that the escape of gas is improved and the atmosphere is uniform. It describes that a to-be-fired body can be manufactured uniformly by conversion.

JP-A-6-207785 No. 2009/110400

However, even when the techniques described in the above patent documents are used, it is easy to prevent the setter from cracking or the like to a satisfactory level when rapidly heating and cooling the object to be fired. Not.

Therefore, 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 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 with the first filaments. A ceramic lattice body having
The intersection of the first filament and the second filament is the second filament on the first filament at any intersection.
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 at a portion other than the intersection. ,
The second striated portion has a circular or oval shape in cross section at a portion other than the intersection,
The ceramic lattice body has a straight side portion in at least a part of the outline in plan view,
The present invention provides a ceramic lattice body in which the first and second linear portions and the linear side portion intersect each other independently at an angle of not less than 10 degrees and not more than 170 degrees.

The ceramic lattice of the present invention has high strength and excellent spalling resistance.

Fig.1 (a) is a top view which shows one Embodiment of the ceramic lattice body of this invention, FIG.1 (b) is a principal part enlarged plan view of the ceramic lattice body shown to Fig.1 (a). 2A is a perspective view of the ceramic lattice body shown in FIGS. 1A and 1B, and FIG. 2B shows the ceramic lattice body shown in FIG. 2A from the opposite side. FIG. 3 is a cross-sectional view taken along line III-III in FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. FIG. 5 is a cross-sectional view taken along line VV in FIG. 6 is a cross-sectional view taken along line VI-VI in FIG. FIG. 7 is a projection view of the vicinity of the intersection point as seen from the second filament part side in the ceramic lattice shown in FIG. FIG. 8 is a projection view of the vicinity of the intersection point as seen from the first filament part side in the ceramic lattice shown in FIG. FIG. 9 is a schematic diagram showing the shape of the through hole in the ceramic lattice shown in FIG. FIG. 10 is a plan view showing another embodiment of the ceramic lattice body of the present invention. FIG. 11A and FIG. 11B are schematic views showing still another embodiment of the ceramic lattice body of the present invention.

Hereinafter, the present invention will be described based on preferred embodiments with reference to the drawings. 1 (a) and 1 (b) show an embodiment of the ceramic lattice body of the present invention. A ceramic lattice body (hereinafter, also simply referred to as “lattice body”) 1 shown in these drawings has a straight side portion in at least a part of a contour in plan view. Specifically, the lattice body 1 has a rectangular outline having a first side L1 and a second side L2 facing each other, and a third side L3 and a fourth side L4 facing each other. ing.

As shown in FIGS. 1 (a) and 1 (b) and FIGS. 2 (a) and 2 (b), the lattice body 1 has a plurality of ceramic first filaments extending in one direction X. 10 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. Since the X direction and the Y direction are different directions, the first linear portion 10 and the second linear portion 20 intersect each other. The grid body 1 is formed by the plurality of first linear portions 10 and the plurality of second linear portions 20 intersecting each other. The side portions L1 and L2 described above are lines that are virtually formed by connecting the end portions of the plurality of first line portions 10 and the end portions of the plurality of second line portions 20 to each other. The first filament part 10 and / or the second filament part 20 made of ceramics corresponding to the parts L1 and L2 do not necessarily exist. Note that the X direction and the Y direction generally intersect at an angle of 90 degrees.

The crossing angle between the first filament part 10 and the second filament part 20 can be set according to the specific application of the ceramic lattice 1. In the present embodiment, the two

linear portions

10 and 20 intersect at 90 degrees (right angle), an angle smaller than 90 degrees, or an angle larger than 90 degrees. Furthermore, it is preferable that the 1st filament part 10 and the 2nd filament part 20, and the linear side part in the ceramic lattice body 1 cross | intersect independently at an angle of 10 to 170 degree | times independently. When the ceramic lattice body 1 has two or more straight side portions, it is preferable that the angular relationship described above is satisfied in any one of the straight portions. The ceramic lattice body 1 of the present embodiment has a pair of side portions L1 and a pair of side portions L2 as linear portions. For example, as shown in FIG. 1B, the first linear portion 10 and the first side In the angle formed with the part L1, the angle formed counterclockwise starting from L1 toward the first linear part is θ1, and starting from L1, counterclockwise toward the second linear part When the angle formed is θ2, it is preferable that θ1 and θ2 are independently 10 degrees or more and 170 degrees or less. θ1 and θ2 may have a complementary angle relationship or may not have a complementary angle relationship. Θ1 and θ2 can be set at an arbitrary angle, but are preferably orthogonal to obtain the effect of improving thermal shock resistance (spalling resistance) described later.

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 a first surface 1a and a second surface 1b opposite to the first surface 1a.

1st line part 10 has fixed width W1 (refer to Drawing 3) in plane view in positions other than intersection 2 of both

line parts

10 and 20. As shown in FIGS. 3 and 4, the first filament 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. Specifically, the first linear portion 10 has a straight section 10A and both end portions of the straight section 10A at a portion other than the intersection 2 in a cross section along the thickness direction in a direction orthogonal to the longitudinal direction. It has a shape constituted by a convex curve portion 10B as an end portion. As a result, the first surface 10 a of the first linear portion 10 has a flat cross section in the thickness direction of the linear portion 10. The flat surface is substantially parallel to the in-plane direction of the ceramic lattice body 1. On the other hand, the second surface 10b of the first linear portion 10 has a convex curved surface shape in which the cross section in the thickness direction of the linear portion 10 is directed from the first surface 1a to the second surface 1b of the ceramic lattice body 1. I am doing.

Similar to the first filament part 10, the second filament part 20 also has a constant width W2 (see FIG. 6) in a plan view at a position other than the intersection 2 of the

filament parts

10, 20. is doing. The width W2 may be the same as or different from the width W1 of the first linear portion 10. As shown in FIGS. 5 and 6, 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 first surface 20a of the second linear portion 20 has a convex curved shape from the second surface 1b of the ceramic lattice body 1 toward the first surface 1a. On the other hand, the second surface 20b of the second linear portion 20 has a convex curved surface shape in which the cross section in the thickness direction of the linear portion 20 is directed from the first surface 1a to the second surface 1b of the ceramic lattice 1. I am doing. The curved surface shape may be the same as or different from the curved surface shape in the first linear portion 10. In the present embodiment, the first surface 20a and the second surface 20b of the second linear portion 20 are symmetrical, and as a result, the second linear portion 20 is orthogonal to the longitudinal direction. The cross-sectional shape along the thickness direction in the direction is circular or elliptical.

As shown in FIGS. 4 and 5, when 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 the placement surface, all the first surfaces 10 a are all on the plane P. Located in. Since the first surface 10a forms the first surface 1a of the ceramic lattice body 1, 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.

As shown in FIG. 4, when the linear portion 10 </ b> A of the first linear portion 10, i.e., the first surface 10 a is placed on the plane P as the placement surface, the second linear portion 20 includes two adjacent linear portions 20. The shape is separated from the plane P between the intersection points 2. Accordingly, a space S is formed between the second linear portion 20 and the plane P between two adjacent intersections 2.

On the other hand, since the 2nd surface 1b in the ceramic lattice body 1 is comprised from the 2nd surface 20b of the 2nd linear part 20 which is a convex curved surface shape, it becomes an uneven surface instead of a flat surface. Yes.

At the intersection 2 between the first filament portion 10 and the second filament portion 20 in the ceramic lattice 1, the

filament portions

10 and 20 are integrated. “Integrated” means that, when the cross section of the intersection 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 diamond shape. The through holes 3 are regularly arranged.

As shown in FIGS. 1B, 2, 4, and 5, the intersection 2 between the first filament 10 and the second filament 20 is the first line at any intersection 2. A second linear portion 20 is disposed on the linear portion 10. That is, at the intersection 2 between the first linear portion 10 and the second linear portion 20, the first of the two

surfaces

1 a and 1 b of the lattice 1 that is relatively located on the first surface 1 a side. The 2nd linear part 20 located relatively on the 2nd surface 1b side is distribute | arranged on the linear part 10 of this. And the thickness in the intersection 2 is larger than both the thickness of the 1st filament part in the site | parts other than this intersection, and the thickness of the 2nd filament part. That is, the thickness of the first filament 10 at a position other than the intersection 2 between the two

filaments

10 and 20 is T1 (see FIG. 3), and the second at a position other than the intersection 2 between the

filaments

10 and 20 is the second. When the thickness of the linear portion 20 is T2 (see FIG. 6) and the thickness at the intersection is Tc (see FIGS. 4 and 5), Tc> T1 and Tc> T2. Therefore, on the second surface 1 b of the ceramic lattice body 1, the position of the intersection of the two

linear portions

10 and 20 is the highest.

As shown in FIG. 5, in the first line portion 10, the highest position of the second surface 10 b in the first line portion 10, that is, the position of the top portion of the first line portion 10 is the first line portion. It is the same along the direction in which the part 10 extends. With respect to the second filament part 20, as shown in FIG. 4, the highest position of the second surface 20b in the second filament part 20 is the first in any of the position of the intersection point 2 and the position other than the intersection point 2. It is the same along the direction where the linear part 10 extends. The lowest position of the first surface 20 a in the second linear portion 20 is the same along the direction in which the second linear portion 20 extends in parts other than the intersection 2.

As shown in FIG. 2A and FIG. 7, the projected image in the plan view of the second linear portion 20 is curved outward in the width direction (X direction in FIG. 7) at the intersection 2. It has a bulging shape. As a result, the width W2a of the projected image at the intersection 2 is larger than the width W2b of the projected image at a portion other than the intersection 2. Specifically, the second linear portion 20 has an outline along the longitudinal direction (Y direction in FIG. 7) of the projected image in a plan view, and is outward in the width direction (X direction in FIG. 7) at the intersection 2. Gently

convex curves

21 and 21 are drawn. 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. At a position between the intersections 2, the width becomes W2b. The width W2b is the same as the width W2 described above.

On the other hand, as shown in FIGS. 2B and 8, the first linear portion 10 has a projected image in plan view directed outward in the width direction (Y direction in FIG. 8) at the intersection 2. It has a curved and bulging shape. As a result, the width W1a of the projected image at the intersection 2 is larger than the width W1b of the projected image at a portion other than the intersection 2. Specifically, the first linear portion 10 has an outline along the longitudinal direction (X direction in FIG. 8) of the projected image in plan view, and the intersection 2 is outward in the width direction (Y direction in FIG. 8). A gentle

convex curve

11, 11 is drawn toward. 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. At a position between the intersections 2, the width becomes W1b. The width W1b is the same as the width W1 described above.

FIG. 9 shows a plan view of the ceramic lattice 1. As shown in the figure, the lattice body 1 has a plurality of substantially rhombic shapes in a plan view of the lattice body by intersecting a plurality of first linear portions 10 and a plurality of second linear portions 20. Through-holes 3 are formed. The through-hole 3 having a substantially rhombus shape has

first sides

3a and 3a that are a pair of opposing sides. At the same time, 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. On the other hand, 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. Similarly, the opposing

second sides

3b, 3b are straight and extend parallel to each other. And when the 1st filament part 10 and the 2nd filament part 20 have the curve bulging shape mentioned above in those intersections 2, the through-hole 3 is like the schematic diagram shown in FIG. The corner 30 is a slightly rounded rhombus.

When the ceramic lattice body 1 having the above configuration is used as, for example, a setter for firing an object to be fired, the first wire portion 10 and the second wire portion 20 are formed by the first side portion L1 and Since it intersects with the second side L2 at a small acute angle, even if a defect such as a crack occurs in the first side L1 and / or the second side L2, the defect is inward of the lattice 1. Difficult to propagate towards The reason for this is that the place where defects such as cracks are most likely to occur is in the vicinity of the intersection 2 between the first linear portion 10 and the second linear portion 20. Since the imaginary line connecting the intersection point 2 is not parallel to the first side portion L1 and the second side portion L2, a defect such as a crack generated near a certain intersection point 2 propagates to the adjacent intersection point 2 This is because it is blocked. In contrast, if the first linear portion 10 and the second linear portion 20 are orthogonal to each other, the imaginary line connecting each intersection 2 is the first side portion L1 and the second side portion L1. Since a defect such as a crack generated in the vicinity of an intersection 2 easily propagates to the intersection 2 located next to it, it propagates to the adjacent intersection 2 in a chain. The cracks are likely to occur in the entire lattice body 1.

From the viewpoint of effectively preventing the propagation of defects such as cracks as described above, the above-described θ1 and θ2 are more preferably independently from 10 ° to 170 °, more preferably from 20 ° to 160 °. preferable. When θ1 is preferably 30 ° or more and 150 ° or less, θ2 is preferably 30 ° or more and 150 ° or less.

From the same point of view, in order for the first and second

linear portions

10 and 20 to intersect the first side L1 and the second side L2 at a small acute angle, θ1 and θ2 is preferably 10 ° to 80 °, or 100 ° to 170 °, more preferably 20 ° to 70 °, or 110 ° to 160 °, and more preferably 30 °. It is 60 degrees or less or 120 degrees or more and 150 degrees or less.

From the viewpoint of more effectively preventing the propagation of defects such as cracks, the crossing angle | θ1-θ2 | between the first linear portion 10 and the second linear portion 20 is not less than 60 degrees and not more than 120 degrees. Preferably, it is 70 degrees or more and 110 degrees or less, more preferably 80 degrees or more and 100 degrees or less, and the most preferable angle is in the range of 90 degrees ± 3 degrees (in a state of being orthogonal). is there.

Moreover, in the grid | lattice body 1 of this embodiment, as for the 1st filament part 10, the thickness direction cross section in the direction orthogonal to the longitudinal direction is not a rectangle in parts other than the intersection 2, but as shown in FIG. Since it has a shape composed of the straight portion 10A and the convex curved portion 10B having both ends of the straight portion 10A as ends, it is difficult for defects such as cracks to occur. Defect propagation is difficult to occur. Further, the second linear portion 20 has a circular or elliptical shape as shown in FIG. 6 in the cross section in the thickness direction in the direction orthogonal to the longitudinal direction at a portion other than the intersection 2 as shown in FIG. This also makes it difficult for defects such as cracks to occur, and to prevent the propagation of defects.

Furthermore, in the lattice body 1 of the present embodiment, the strength and spalling resistance are improved due to the rounded corners 30 of the substantially rhombic through-holes 3. This is because the portion of the ceramic lattice 1 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 achieved by the fact that at least the second linear portion 20 at the intersection point 2 between the first linear portion 10 and the second linear portion 20 has a projected image in plan view. If the contour along the longitudinal direction has the convex curve 21 described above, this is sufficiently achieved. 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.

When the ceramic 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. As a to-be-fired body from which flatness is calculated | required, small chip-shaped electronic components, such as a multilayer ceramic capacitor, etc. are mentioned, for example. 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. Moreover, since 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 grid | lattice body 1 and a to-be-fired body reduces significantly, and, thereby, to-be-fired It becomes easy to perform rapid heating and cooling of the body. Further, since 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. Furthermore, since 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 is floating between the adjacent intersections 2. In addition, in the grid body 1, the first and second

linear portions

10 and 20 are integrated at the intersection point 2, and therefore have sufficient strength.

On the other hand, it is advantageous to place an object to be fired on the order of mm on the second surface 1b of the lattice body 1. 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. Further, among the objects to be fired in the order of mm, a long and thin object that can be placed on the upper surface of the first linear portion 10 and between the second linear portions 20 is placed. It is also advantageous from the viewpoint of improving the degreasing property while fixing the body to be fired.

As described above, 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.

From the viewpoint of making the various advantageous effects described above more remarkable, the value of T1 is preferably 50 μm or more and 5000 μm or less, and more preferably 200 μm or more and 2000 μm or less. On the other hand, the value of T2 is preferably 50 μm or more and 5000 μm or less, and more preferably 200 μm or more and 2000 μm or less. The magnitude relationship between the values of T1 and T2 is not particularly limited, and may be T1> T2, conversely, T1 <T2, or T1 = T2. T1 = T2 means that T1 and T2 have the same dimensions within the manufacturable range, and T1 and T2 do not need to be completely the same. Including cases where the size is large within 5%.

From the same viewpoint, the thickness Tc at the intersection 2 is preferably 0.1 mm or more and 2 mm or less, and more preferably 0.3 mm or more and 1.5 mm or less. The thickness Tc at the intersection 2 is smaller than T1 + T2, which is the sum of T1 and T2.

Moreover, when the cross-sectional shape (refer FIG. 6) in the thickness direction of the 2nd filament part 20 is an ellipse, an elliptical short axis corresponds to the thickness direction of the grid | lattice body 1, and an elliptical long axis Is preferably coincident with the planar direction of the lattice body 1 from the viewpoint of successfully placing the object to be fired. In this case, the major axis / minor axis ratio is preferably 1 or more and 3 or less, and more preferably 1 or more and 2.5 or less. In addition, 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 μm ² or more and 100 mm ² or less, particularly 2500 μm 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.

In relation to the area of the through-hole 3, the width W1 of the first linear portion 10 is preferably 50 μm or more and 10 mm or less, and more preferably 75 μm or more and 5 mm or less. On the other hand, the width W2 of the second linear portion 20 is preferably 50 μm or more and 10 mm or less, and more preferably 75 μm or more and 5 mm or less. There is no particular limitation on the magnitude relationship between the values of W1 and W2, W1> W2 may be satisfied, W1 <W2 may be conversely, or W1 = W2.

In relation to the widths W1 and W2 of the first and second

linear portions

10 and 20, the pitch P1 between the adjacent first linear portions 10 is preferably 100 μm or more and 10 mm or less, and 150 μm or more and 5 mm. More preferably, it is as follows. On the other hand, the pitch P2 between the adjacent second linear portions 20 is preferably 100 μm or more and 10 mm or less, and more preferably 150 μm or more and 5 mm or less.

It is preferable that the 1st surface 10a is smooth among the surfaces of the 1st filament part 10. FIG. Since the first surface 10a of the linear portion 10 is smooth, there is an advantage that when the object to be fired is placed on the ceramic lattice body 1, the object to be fired is hardly damaged. In addition, there is an advantage that the fired body obtained by firing the body to be fired is not easily caught by the ceramic lattice body 1 and the take-out property is improved. Furthermore, if the body to be fired is a thin tape molded body such as a substrate, the surface state of the first surface 10a is transferred to the bottom surface of the body to be fired, so that the bottom surface of the body to be fired can be finished more smoothly. is there. On the other hand, when the surface roughness is large, there is an advantage that when the object to be fired is placed, the flow of gas in the lower part of the object to be fired is improved, so that the degreasing easily proceeds smoothly. From these viewpoints, the surface roughness Ra of the first surface 10a of the first filament portion 10 is preferably 0.01 μm or more and 20 μm or less, more preferably 0.02 μm or more and 10 μm or less, Most preferably, it is 1 μm or more and 1 μm or less. On the other hand, the surface roughness Ra of the second surface 20b of the second linear portion 20 is preferably 0.01 μm or more and 20 μm or less, more preferably 0.02 μm or more and 10 μm or less, and more preferably 0.1 μm or more. Most preferably, it is 1 μm or less. Specifically, the surface roughness Ra is measured by the following method. Using a color 3D laser microscope (manufactured by Keyence Co., Ltd., VK-8710), the measurement magnification was 200 times. For the first surface 10a of the first filament 10, the surface roughness was measured along the middle line of the first surface 10a, and an average value was calculated from the 20 measured values, which was Ra. On the other hand, on the second surface 20b of the second striated portion 20, the surface roughness was measured along the middle line of the striated portion 20, and an average value was calculated from the 20 measured values, which was Ra.

In order to reduce the value of the surface roughness Ra of the

linear portions

10 and 20, for example, a substrate having a small surface roughness is used as a substrate on which the paste used for forming the linear portions is applied, or the paste A low-viscosity material may be used. On the other hand, in order to increase the value of the surface roughness Ra of the

linear portions

10 and 20, for example, a high-viscosity paste may be used or the diameter of the nozzle to be discharged may be increased. In some cases, the first surface 10a and / or the second surface 10b of the ceramic lattice body 1 may be polished and processed to have a predetermined surface roughness.

As the ceramic material constituting the ceramic lattice body 1, 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. 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. 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 intersection point 2, it is preferable that the ceramic materials constituting both the

linear portions

10 and 20 are the same. Further, from the viewpoint of enhancing the integrity of the first and second

linear portions

10 and 20 and strengthening the ceramic lattice 1, the first linear portion 10 and the second linear portion 10 are intersected at the intersection 2. The member that joins the linear portion 20 is preferably the same as the ceramic material that constitutes the

linear portions

10 and 20. The joining of the first and second

linear portions

10 and 20 can be performed, for example, by firing a lattice-shaped precursor formed by two types of linear coated bodies, as shown in a manufacturing method described later. it can.

Next, a preferred method for manufacturing the ceramic lattice 1 of the present embodiment will be described. In this manufacturing method, first, 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.

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. Specifically, the viscosity of the paste is preferably more than 1.5 MPa · s and not more than 10.0 MPa · s, more than 1.5 MPa · s and not more than 5.0 MPa · s at the temperature at the time of application. Is more preferable. As the viscosity of the paste, a measured value at a time point of 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.

A paste having a relatively low viscosity can also be used. In the case of using a low-viscosity paste, after producing the lattice precursor described later, before subjecting the lattice precursor to the firing step, the lattice precursor is dried to remove the liquid component, It is preferable to perform firing after increasing the shape retention of the lattice precursor. When using a paste having a relatively low viscosity, 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.

Whether the paste has a high viscosity or a relatively low viscosity, the ratio of the raw material powder of the ceramic material in the paste is 30% by mass or more and 75% by mass or less. It is preferably 40% by mass or more and 60% by mass or less. 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. Examples of the thickener include polyethylene glycol fatty acid ester, alkylallyl sulfonic acid, alkyl ammonium salt, ethyl vinyl ether / maleic anhydride copolymer, fumed silica, albumin and other proteins. In many cases, 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. Examples of the flocculant include polyacrylamide, polyacrylic acid ester, aluminum sulfate, and polyaluminum chloride. Examples of thixotropic agents include fatty acid amides, oxidized polyolefins, polyether ester type surfactants, and the like. As 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. In order to stabilize the discharge amount, a plasticizer, a lubricant, a dispersant, a sedimentation inhibitor, a pH adjuster, or the like may be added. Examples of the plasticizer include glycols such as trimethylene glycol and tetramethylene glycol, glycerin, butanediol, phthalic acid, adipic acid, and phosphoric acid. Examples of the lubricant include hydrocarbons such as liquid paraffin, micro wax, and synthetic paraffin, higher fatty acids, fatty acid amides, and the like. Examples of the dispersant include sodium polycarboxylate or ammonium salt, acrylic acid type, polyethyleneimine, and phosphoric acid type. Examples of the precipitation inhibitor include polyamide amine salts, bentonite, and aluminum stearate. Examples of the pH adjusting agent include sodium hydroxide, aqueous ammonia, oxalic acid, acetic acid, hydrochloric acid and the like.

Using the obtained paste, a plurality of linear first coated bodies are formed in parallel and linearly on a flat substrate. The filament first coating body corresponds to the first filament portion 10 in the target lattice body 1. Various coating apparatuses can be used for forming the first filament coated body. For example, a small extruder can be used. The diameter of the nozzle in the small extruder can be, for example, 0.2 mm or more and 5 mm or less.

When the first filament coated body is formed, a plurality of filament second coated bodies are then formed in parallel and linearly so as to intersect the first filament coated body. The filament second coated body corresponds to the second filament portion 20 in the target lattice body 1. For the formation of the second filament coated body, a coating device similar to the first filament coated body can be used. Thus, the grid body 1 in which the 2nd filament part 20 is located on the 1st filament part 10 is succeeded by forming a filament 1st coating body and a filament 2nd coating body sequentially. Well obtained. In this case, by using a high-viscosity paste as the paste, the second filament coated body is appropriately applied at the intersection of the filament first coated body and the second filament coated body. It sinks into the body, whereby the side edges of these coated bodies bulge out outward in the width direction. Furthermore, between the adjacent intersections, the filament second coating body is in a bridging state (that is, in a floating state).

In this way, a lattice-shaped precursor formed by two types of filament coated bodies is obtained. When 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. Thereby, 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. Moreover, it is prevented that 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. or lower in the atmosphere. The heating time can be, for example, 0.5 hours or more and 12 hours or less. When the viscosity of the paste is high, it is often unnecessary to dry the lattice precursor, and in that case, the lattice precursor can be directly subjected to the firing step described below.

The dried grid-like precursor is peeled off from the substrate and placed in a firing furnace for firing. By this firing, the target ceramic lattice body 1 in which the two

linear portions

10 and 20 are integrated at the intersection 2 is obtained. 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 atmosphere temperature.

By the above method, the target ceramic lattice 1 is obtained. 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. In this case, it is common to place the body to be fired on the second surface 1b, which is an uneven surface in the lattice body 1, but depending on the type of body to be fired, the second line on the second surface 1b side. A to-be-fired body may be mounted between the strips, and the to-be-fired body may be placed on the first surface 1a which is a flat surface. For example, when performing the firing step in the manufacturing process of the multilayer ceramic capacitor (MLCC), it is preferable to place the body to be fired on the first surface 1a which is a flat surface, and for the purpose of fixing the MLCC, You may mount a to-be-fired body between 1st filament parts by the 1st surface 1a side.

As mentioned above, although this invention was demonstrated based on the preferable embodiment, this invention is not restrict | limited to the said embodiment. For example, the ceramic lattice body 1 of the above embodiment has a rectangular outline in plan view, but the outline of the lattice body 1 is not limited to this, and may be other shapes such as a polygon such as a triangle or a hexagon. Also good. Moreover, the lattice body 1 should just have a linear side part in at least one part of the outline, for example, the outline may be comprised from the combination of a linear side part and a curved side part. In that case, the crossing angles θ <b> 1 and θ <b> 2 between the straight side portion and the first linear portion 10 and the second linear portion 20 may satisfy the above-described values.
Moreover, a linear side part, a curved side part, etc. may be formed in these outlines with ceramics.

Moreover, although the ceramic lattice body 1 of the said embodiment used two types of line | wire parts, the 1st line | wire part 10 and the 2nd line | wire part 20, in addition to this, it is the 3rd line | wire part. (Not shown) may be used. For example, the ceramic lattice body may have a structure in which the second linear portion 20 is stacked on the first linear portion 10 and the first linear portion 10 is further stacked thereon. In this case, the angle θ1 formed by the lowermost first linear portion 10 and the straight side portion may be the same as or different from the angle θ1 formed by the uppermost first linear portion 10 and the linear side portion. May be. Further, the shape and thickness of the lowermost first linear portion 10 and the shape and thickness of the uppermost first linear portion 10 may be the same or different.

Further, for the purpose of improving the strength of the ceramic lattice body 1 of the embodiment, an outer frame 40 may be provided on the outer periphery of the lattice body 1 as shown in FIG. The outer frame 40 may be integrally formed from the same material as that of the grid body 1 or may be manufactured separately from the grid body 1 and bonded by a predetermined bonding means. In the present embodiment, the above-described angles θ1 and θ2 are angles formed by the first linear portion 10 and the second linear portion 20 and the outer frame 40.

Further, the ceramic lattice body 1 of the above embodiment has a single-layer structure, but instead of this, a plurality of the lattice bodies 1 are used, for example, as shown in FIGS. 11 (a) and 11 (b). Multiple layers may be used. In the embodiment shown in FIG. 11 (a), 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 ′. Are laminated to form a lattice body 1. The first linear portion 10 'in the first lattice body 1' and the second lattice body 1 are laminated. Are arranged so as to have the same pitch. Similarly, the second linear portion 20 ′ in the first grid 1 ′ and the second grid 1 ” It is arranged so as to have the same pitch as the second linear portion 20 ″. The first linear portion 10 ′ in the first lattice 1 ′ and the first line in the second lattice 1 ″. The strip portion 10 ″ is not limited to an embodiment in which the strips are arranged to have the same pitch, and the body to be fired is placed on the upper surface of the ceramic lattice body or between each strip portion. It can be designed with an arbitrary pitch ratio in accordance with the mode to be placed. Similarly, the second filament 20 ′ in the first grid 1 ′ and the second filament in the second grid 1 ″. The portion 20 ″ is not limited to an embodiment in which the pitch is set to be the same pitch, and an arbitrary pitch according to an embodiment in which the object to be fired is placed on the upper surface of the ceramic lattice body or between each linear portion. Can be designed in proportion.

On the other hand, in the embodiment shown in FIG. 11 (b), 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. Similarly, 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. Note that the second linear portion 20 ′ in the first grid 1 ′ and the second linear portion 20 ″ in the second grid 1 ″ are arranged so as to be shifted by a half pitch (1/2 pitch). For example, the pitch can be designed with an arbitrary pitch ratio according to the mode of placing the object to be fired, such as 1/3 pitch to 1/10 pitch. Similarly, 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 (1/2 pitch). For example, the pitch can be designed with an arbitrary pitch ratio according to the mode of placing the object to be fired, such as 1/3 pitch to 1/10 pitch. In this way, by designing the pitch ratio in accordance with, for example, the size of the MLCC, the MLCC is fitted between the single-layer or multiple-layer first linear portion and the single-layer or multiple-layer second linear portion. By placing the MLCC in this manner, it is possible to prevent the MLCC from falling and stably place the MLCC.

Hereinafter, the present invention will be described in more detail with reference to examples. However, the scope of the present invention is not limited to such examples. Unless otherwise specified, “part” means “part by mass”.

[Example 1]
(1) Preparation of a paste for forming a filament coated body 65.3 parts of 8 mol% yttria-added fully stabilized zirconia powder having an average particle diameter of 0.8 μm, 5.0 parts of a methylcellulose binder as an aqueous binder, As a plasticizer, 2.5 parts of glycerin, 1.1 parts of a polycarboxylic acid-based dispersant (molecular weight 12000) and 26.1 parts of water were mixed and defoamed to prepare a paste. The viscosity of the paste was 1.6 MPa · s at 25 ° C.
(2) Formation of a linear coated body A linear coated first body is formed on a resin substrate in a 25 ° C. environment using a small extruder having a 0.8 mm diameter nozzle using the paste as a raw material. Then, a second filament coated body that intersected with it 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 1600 ° C., and the firing time was 3 hours. The specifications of the obtained lattice are shown in Tables 1 to 3 below. In these tables, “hole diagonal lengths Q1, Q2” are the diagonal lengths of the hole diagonal portions of the network structure as shown in FIG. In the obtained lattice, as shown in FIG. 9, the corners of the rhomboid through-holes were rounded. Further, θ1 (see FIG. 1B) was 45 degrees, and θ2 was 135 degrees (the value of | θ1−θ2 | was 90 degrees).

[Example 2]
θ1 is 10 degrees, and θ2 (see FIG. 1B) is 60 degrees (the value of | θ1-θ2 | is 50 degrees). A ceramic lattice body was obtained in the same manner as in Example 1 except for the angles θ1 and θ2 and the angles at which they intersect. In the obtained lattice, as shown in FIG. 9, the corners of the rhomboid through-holes were rounded.

Example 3
θ1 is 30 degrees and θ2 (see FIG. 1B) is 120 degrees (the value of | θ1-θ2 | is 90 degrees). A ceramic lattice body was obtained in the same manner as in Example 1 except for the angles θ1 and θ2 and the angles at which they intersect. In the obtained lattice, as shown in FIG. 9, the corners of the rhomboid through-holes were rounded.

Example 4
θ1 was 10 degrees, and θ2 (see FIG. 1B) was 170 degrees (the value of | θ1−θ2 | was 160 degrees). A ceramic lattice body was obtained in the same manner as in Example 1 except for the angles θ1 and θ2 and the angles at which they intersect. In the obtained lattice, as shown in FIG. 9, the corners of the rhomboid through-holes were rounded.

Example 5
θ1 is 45 degrees and θ2 (see FIG. 1B) is 135 degrees (the value of | θ1-θ2 | is 90 degrees). The nozzle diameter was 0.4 mm. A ceramic lattice body was obtained in the same manner as in Example 1 except for the angles θ1 and θ2 and the angles at which they crossed each other and the nozzle diameter. In the obtained lattice, as shown in FIG. 9, the corners of the rhomboid through-holes were rounded.

Example 6
θ1 is 45 degrees and θ2 (see FIG. 1B) is 135 degrees (the value of | θ1-θ2 | is 90 degrees). The nozzle diameter was 1.0 mm. A ceramic lattice body was obtained in the same manner as in Example 1 except for these angles and nozzle diameters. In the obtained lattice, as shown in FIG. 9, the corners of the rhomboid through-holes were rounded.

Example 7
As in Example 2, θ1 was set to 10 degrees and θ2 (see FIG. 1B) was set to 60 degrees (the value of | θ1−θ2 | was 50 degrees). Furthermore, a filament 3rd coating body was formed so that it might cross | intersect on a filament 2nd coating body, and the lattice-shaped precursor was obtained. The θ3 of the third filament coated body was 20 degrees. Otherwise, a ceramic lattice was obtained in the same manner as in Example 1. In the obtained lattice, as shown in FIG. 9, the corners of the rhomboid through-holes were rounded.

Example 8
As in Example 7, θ1 was 10 degrees, θ2 (see FIG. 1B) was 60 degrees, and θ3 was 10 degrees (the value of | θ1−θ2 | was 50 degrees). The filament 3rd coating body was formed in the position which overlaps, when planarly viewed with the filament 1st coating body. Otherwise, a ceramic lattice was obtained in the same manner as in Example 7. In the obtained lattice, as shown in FIG. 9, the corners of the rhomboid through-holes were rounded.

Example 9
θ1 is 45 degrees, θ2 (see FIG. 1B) is 135 degrees, and θ3 is 45 degrees (the value of | θ1−θ2 | is 90 degrees). The filament 3rd coating body was formed in the position which overlaps, when planarly viewed with the filament 1st coating body. Otherwise, a ceramic lattice was obtained in the same manner as in Example 7. In the obtained lattice, as shown in FIG. 9, the corners of the rhomboid through-holes were rounded.

Example 10
θ1 is 45 degrees, θ2 (see FIG. 1B) is 135 degrees, and θ3 is 45 degrees (the value of | θ1−θ2 | is 90 degrees). The line third coated body was formed at a position between the adjacent first line coated bodies parallel to and adjacent to the line first coated body when viewed in plan. Otherwise, a ceramic lattice was obtained in the same manner as in Example 7. In the obtained lattice, as shown in FIG. 9, the corners of the rhomboid through-holes were rounded.

[Comparative Example 1]
θ1 is 5 degrees and θ2 (see FIG. 1B) is 95 degrees (the value of | θ1-θ2 | is 90 degrees). Otherwise, a ceramic lattice was obtained in the same manner as in Example 1.

[Comparative Example 2]
θ1 is 0 degree and θ2 (see FIG. 1B) is 90 degrees (the value of | θ1-θ2 | is 90 degrees). Otherwise, a ceramic lattice was obtained in the same manner as in Example 1.

[Comparative Example 3]
In this comparative example, a solution obtained by dissolving gelatin in hot water (the gelatin concentration is 3% with respect to water) is prepared, and this solution is mixed with a yttria fully stabilized zirconia slurry prepared in advance. did. The mixing was performed so that the volume ratio of yttria fully stabilized zirconia to water in the mixed solution was 10:90. This mixed solution was allowed to stand in a refrigerator to be gelled. The gel was frozen with an ethanol freezer. After the frozen gel was dried (lyophilized), the obtained dried product was degreased and baked at 1600 ° C. for 3 hours. The lattice body thus obtained had a porosity of 79%, a pore diameter of 95 μm, and a structure in which pores were oriented in the thickness direction.

[Evaluation]
About the lattice body obtained by the Example and the comparative example, the spalling evaluation was performed with the following method. The results are shown in Tables 1 to 3 below.

[Evaluation of spalling resistance]
As a pseudo work assuming a small electronic component such as MLCC on a sample of 150 mm in length × 150 mm in width × 0.8 to 1.5 mm in thickness, alumina particles sized to 500 to 1000 μm are opened with a 5 mm edge, As a whole, it was spread uniformly so as to be 0.35 g / cm ² . Prepared rack-shaped kiln tool with mullite foot (external size 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 ) Is placed on a base plate, a sample loaded with a pseudo work is set on the rack, heated at high temperature in an atmospheric baking furnace and held at a desired temperature for 1 hour or more, then taken out from the electric furnace and exposed to room temperature, The presence or absence of cracking of the sample was evaluated with the naked eye. The set temperature was changed from 200 ° C. to 950 ° C. while increasing the temperature by 50 ° C., and the upper limit of the temperature at which no cracks occurred was defined as “spoling resistance”.

As is clear from the results shown in Tables 1 to 3, it can be seen that the lattice bodies obtained in each Example have higher spalling resistance than each Comparative Example.

Claims

A ceramic lattice having 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 Body,
The intersection of the first filament and the second filament is the second filament on the first filament at any intersection.
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 at a portion other than the intersection. ,
The second striated portion has a circular or oval shape in cross section at a portion other than the intersection,
The ceramic lattice body has a straight side portion in at least a part of the outline in plan view,
A ceramic lattice body in which the first and second linear portions and the linear side portion intersect each other independently at an angle of not less than 10 degrees and not more than 170.
The ceramic lattice body has a rectangular outline having first and second side portions facing each other and third and fourth side portions facing each other;
2. The ceramic according to claim 1, wherein the first and second linear portions and the first and second side portions independently intersect at an angle of 10 degrees to 170 degrees. Lattice body.
The second linear portion has a shape in which the projected image in plan view is curved and bulged outward in the width direction at the intersection, whereby the width of the projected image at the intersection is The ceramic lattice body according to claim 1 or 2, wherein the ceramic lattice body is larger than a width of a projected image at a portion other than the intersection.
When the linear portion of the first linear portion is placed on a plane as a placement surface, the second linear portion is shaped to be separated from the plane between two adjacent intersections. The ceramic lattice body according to any one of claims 1 to 3.
The first linear portion has a shape in which the projected image in plan view is curved and bulged outward in the width direction at the intersection, whereby the width of the projected image at the intersection is The ceramic lattice body as described in any one of Claims 1 thru | or 4 larger than the width | variety of the projection image in site | parts other than an intersection.
The ceramic lattice body according to any one of claims 1 to 5, comprising a ceramic containing alumina, mullite, cordierite, zirconia, silicon nitride, or silicon carbide.
The ceramic lattice body according to claim 6, wherein the surface is coated with zirconia.
The ceramic lattice body according to any one of claims 1 to 7, which is used as a setter for firing ceramic products.