JPH1151572A - Square basin for baking - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a square basin for baking preventing cracking or the like caused in the body of the square basin, and relatively easy in production. SOLUTION: This square basin 10 for baking has the body 1 of the square basin which comprises a refractory with excellent resistance to heat and impact and has a side wall on a bottom plate and at least two sides thereof while the bottom plate or the bottom plate and the side wall are provided with slits 4a-4d and a setter 6 made of a material hard to react with a material to be baked. The setter 6 is provided below the side wall of the body 1 of the square basin to be inserted into a groove and detachably mounted on the body 1 of the square basin by engaging fixing pins 8 in or disengaging them from slits 4a and 4c provided on the body 1 of the square basin and holes provided in the setter 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to ceramic electronic parts such as ceramic capacitors, semiconductor capacitors, ceramic varistors, piezoelectric elements, ferrite cores, and MIM.
The present invention relates to a firing sagger used for firing powder metallurgy products such as sintering.

[0002]

2. Description of the Related Art Ceramic electronic components such as ceramic capacitors, semiconductor capacitors, ceramic varistors, piezoelectric elements, ferrite cores, and powder metallurgy products such as MIM have been conventionally used in alumina, mullite, and cordierite materials having excellent thermal shock resistance. It is mounted on a sagger made of a refractory material such as silicon carbide, and is manufactured by firing at a high temperature of 1000 to 1400 ° C. At this time, when the object to be fired is directly mounted on the sagger and fired, a reaction occurs between the sagger and the object to be fired, and the two may be fused. Further, due to the above reaction, adverse effects such as variations in the characteristics of the object to be fired and significant deterioration of the sagger are caused.

[0003] In order to prevent these adverse effects, a material originally having the same composition as the material to be fired, or a material which is difficult to react with the material to be fired during firing (hereinafter referred to as a hardly reactive material), for example, zirconia, magnesia or the like is used. If the bowl is formed, the above problem does not occur. However, such a material is inferior in thermal shock resistance and is easily broken, and is expensive. Therefore, if the work is performed using this, the production cost will increase. Therefore, conventionally, a powder or plate made of a material that is difficult to react with is provided between the body to be fired and the sagger body, and firing is performed to prevent the reaction between the two. Further, in recent years, automation of manufacturing operations has been advanced, and in order to facilitate loading and unloading operations of the object to be fired, it is required to integrate the sagger body with a powder or plate made of a hard-to-react material. ing.

[0004] In order to fulfill the above-mentioned demands, for example, Japanese Utility Model Publication No. 55-35065 and Japanese Patent Application Laid-Open No.
As disclosed in Japanese Patent Publication No. 190-190, a technique of dispersing and baking powder of zirconia, magnesia, or the like, which is a hardly reactive material, on the inner surface of the bottom of the sagger and integrating it by firing,
No. 832, a technique has been proposed in which a thin plate made of a hard-to-react material, such as zirconia or magnesia, provided with a cutout for absorbing internal stress is fixed to the inner surface of the bottom of the sagger to integrate it. . By using these techniques, it is possible to prevent a reaction occurring between the sagger and the object to be fired in the firing operation, and to unload the object to be fired even when the manufacturing operation is automated. Can be easily performed.

However, in recent years, the speed of raising and lowering the temperature in the firing step has been increasing year by year in order to improve the productivity, and the coating layer made of a difficult-to-react material is separated from the sagger body during repeated firing. In many cases, a plate made of a material that is difficult to react to cracks or the like. Also, cracking or warping may occur only in the sagger body. Such a failure of the sagger main body and the difficult-to-react member is rarely caused at the same time, and one of the failures generally occurs early. Therefore, the above-mentioned Japanese Utility Model No. 55-35
No. 065, Japanese Unexamined Patent Publication No. Sho 63-217190, and Japanese Utility Model Publication No. Sho 57-35832 discloses a firing sagger that integrates a sagger body and a powder or plate of a hard-to-react material. In the case of the sagger, if a failure occurs in either the sagger main body or the difficult-to-react member, the entire firing sagger cannot be used, and there is no other way than to discard. Moreover, since the sagger body and the difficult-to-react member are integrated, it is not possible to separate the sagger body and the difficult-to-react member that have become unusable due to a problem, so that the resources cannot be effectively used. It was not preferable from the viewpoint of utilization.

[0006] In order to solve these problems, the applicant of the present invention has made it possible to attach and detach a setter made of a hard-to-react material to the inner surface of the bottom of a sagger body with a pin as disclosed in Japanese Patent Application Laid-Open No. 8-82488. An integrated firing sagger has been proposed. When using this firing sagger, even if a failure occurs in either the sagger body or the setter, it can be used continuously by replacing one of the failures, Since the unusable sagger body or setter can be separated and collected, it is excellent from the viewpoint of effective use of resources.

[0007]

SUMMARY OF THE INVENTION However, Japanese Patent Application Laid-Open No.
Also in the firing sagger disclosed in Japanese Patent No. 2488, since the sagger is expensive, it has been desired to prevent cracking or warping of the sagger as much as possible and to improve durability. Further, in the firing sagger disclosed in Japanese Patent Application Laid-Open No. 8-82488, it is necessary to form a hole for inserting a fixing pin in order to mount the setter, which is complicated in manufacturing.

Accordingly, the present invention has been made in view of the above-mentioned problems, and it is an object of the present invention to provide a firing sagger which is relatively easy to manufacture while preventing cracks or the like occurring in the sagger main body. With the goal.

[0009]

According to the present invention, there is provided a firing sagger made of a refractory having excellent thermal shock resistance, and having a bottom plate and side walls on at least two sides of the bottom plate. Along with the bottom plate, or a sagger body provided with a slit in the bottom plate and the side wall, and a firing sagger having a setter formed of a material that is difficult to react with the fired body, wherein the setter is The setter is detachably attached to the sagger body by being inserted into a groove provided below the side wall and engaging and disengaging a fixing pin with a slit provided in the sagger body and a hole provided in the setter. It is characterized by having.

A firing sagger according to the present invention, which has been made to solve the above-mentioned problems, is made of a refractory having excellent thermal shock resistance, has a bottom plate and side walls on at least two sides of the bottom plate, and has the bottom plate. Or, in a firing sagger having a sagger body provided with slits in the bottom plate and side walls, and a setter formed of a material that is difficult to react with the fired object,
The setter is inserted into a groove provided below the side wall of the sagger body, and by fitting a protrusion provided on the setter to a slit provided in the sagger body,
A setter is detachably attached to the sagger body.

The slit is preferably formed to have a length of 20 to 40% of the length of the side of the bottom plate of the sagger body. Further, the saggers body, Al ₂ O ₃ quality, Al ₂
O ₃ -SiO ₂ quality, MgO-Al ₂ O ₃ -SiO ₂ quality,
It is preferable to use one or a mixture of two or more thermal shock resistant refractories such as SiC. Further, the setter is:
Consists ZrO ₂ quality or zirconates, the fixing pin is preferably made of a ZrO ₂ quality or zirconates of the setter the same material.

[0012] The firing sagger according to the present invention has a bottom plate,
Or because slits are provided on the bottom plate and side wall,
It is possible to alleviate the thermal shock during the firing step and prevent cracks or the like occurring in the sagger body. Also, by inserting the fixing pin into the slit formed in the sagger body,
Since the setter can be fixed to the sagger main body, there is no need to separately provide a hole for inserting a fixing pin, and the manufacturing can be easily performed.

Furthermore, even if a failure occurs in either the sagger body or the setter after repeated firing, it can be used continuously by replacing the defective one. . In addition, when the setter is mounted on the sagger, the sagger is integrated with the setter as before, so that the sagger is tilted by work or the like when unloading the object to be fired. The setter will not fall out of the sagger even if it does. Furthermore, since the setter is detachable from the sagger main body with a fixing pin, the setter can be easily attached and detached only by inserting and removing the fixing pin. Further, since the fixing pin is made of the same hard-to-react material as the setter, the fixing pin does not react with the object to be fired. In addition, since the unusable sagger body or setter can be separated and collected, each can be used as a recycled material.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a firing sagger according to the present invention will be described below with reference to FIGS. 1 is a top view of the sagger body, FIG. 2 is a side view of the sagger body, FIG.
4A is a top view of the setter, FIG. 4A is a side view of the fixing pin,
(B) is a top view thereof, and FIG. 5 is a side view showing a state where a setter is attached to the sagger body. As shown in FIGS. 1 and 2, the sagger main body 1 is composed of a bottom plate 1a, two side walls 2a and 2b, and has a size of 150 mm in length, 150 mm in width and 20 mm in height, and is excellent in thermal shock resistance. A which is refractory
l ₂ O ₃ , Al ₂ O ₃ -SiO ₂ , MgO-Al ₂
It is formed of any one of O ₃ —SiO ₂ and SiC or a mixture of two or more thereof. Below the side walls 2a and 2b of the sagger body 1, a setter 6 described later is provided.
Are provided with grooves 3a and 3b. The size of the grooves 3a and 3b is 3 mm in width (height) and 3 mm in depth.
mm. Here, the width and depth of the grooves 3a and 3b are formed to be about 0.2 to 1.0 mm larger than the thickness of the setter 6 in consideration of the ease of insertion when the setter 6 is inserted into the sagger body 1. Is preferred. However, in order to reduce the rattling of the setter 6 in the vertical and horizontal directions, the width and the depth of the grooves 3a and 3b are set to be 0.2 times larger than the thickness of the setter 6.
It is preferable to form it so as to be large by about 0.6 mm. It should be noted that, depending on the material of the setter 6, residual expansion may occur during repeated firing, so it is necessary to consider the ratio of the width and depth of the grooves 3a, 3b according to the material of the setter 6.

A bottom plate 1a and a side wall 2 of the sagger body 1
a and 2b have slits 4a for reducing thermal shock,
4b, 4c, and 4d are provided at four positions. The size of the slits 4a, 4b, 4c, and 4d is 5 mm in width and 35 mm in length, and is provided at a position that divides the side of the sagger main body 1 into 1: 2.7, respectively. It may be the position. Usually, opposed slits 4a, 4c, 4b, 4
As shown in FIG. 1, the slits 4a, 4c, 4b, 4d are arranged alternately so that d is not located on the same straight line. In addition, the slits 4a and 4c are the bottom plate 1a and the side wall 2a,
2b. The length of each of the slits 4a, 4b, 4c, and 4d is 20 with respect to the length of the side of the sagger body 1 having the same direction as each slit.
A length of ４０40% is preferred. More specifically,
For example, the slit 4c is 20 to 40% of the side 5a (5b).
Is preferably set to the length. If the length of the slits 4a, 4b, 4c, and 4d is 20% or less of the length of the side of the sagger body 1, this is insufficient to reduce the thermal stress, and is 40%. In the case of the above, cracks are formed between the slits when the object to be fired is loaded and unloaded before and after the firing, so that the object is easily broken. In addition, slit 4
The widths of a, 4b, 4c, and 4d can be inserted with fixing pins 8 for preventing the setter 6 inserted into the grooves 3a, 3b of the sagger from shifting back and forth in the insertion direction, as described later. It needs to be of the order.

Further, the other two sides 5a, 5b of the sagger main body 1 other than the side walls 2a, 2b are open without any side walls 2a, 2b. For this reason, the setter 6 is inserted into the grooves 3a and 3b provided in the side walls 2a and 2b from the opening.
Can be inserted. When the product is collected after firing, the product can be collected from the opening by tilting the sagger body 1 and sliding the product on the setter 6 fixed to the sagger body 1.

Next, the setter 6 mounted on the bottom of the sagger body 1 will be described. Setter 6 is 150 long
Z, which is a thin plate having a thickness of 140 mm, a width of 140 mm, and a thickness of 2.5 mm, and which does not easily react with the object to be fired during firing.
It is formed by rO ₂ material. The thickness of the setter 6 is preferably set in the range of 0.5 mm to 4 mm. If the thickness is less than 0.5 mm, depending on the material of the setter, the mechanical strength is insufficient, and there is an adverse effect that the material tends to break during use, and if it exceeds 4 mm, the weight of the tool increases. Alternatively, a temperature difference in the thickness direction is likely to occur, and a setter crack is likely to occur due to thermal shock. The ZrO ₂ material of the setter 6 easily reacts with the components of the fired body to form a zirconate salt. During firing, the components of the fired body move to the setter 6 side, and there is a problem in the properties of the fired body. May come out. In this case, by setting the material of the setter 6 to a zirconate salt with the corresponding component, the reaction resistance can be improved. For example, when the movement of CaO becomes a problem, CaZrO ₃
It can be improved by having a quality setter. The setter 6 is provided with holes 7a and 7b having a diameter of 6 mm at positions corresponding to the slits 4a and 4c when the setter 6 is inserted into the sagger main body 1. That is, when the setter 6 is attached to the sagger body 1, the holes 7a and 7b communicate with the slits 4a and 4c,
By inserting the fixing pin 8, the setter can be fixed. Although two holes 7a and 7b are provided, holes may be formed for all slits.

FIG. 4 shows the sagger body 1 and the setter 6.
Are shown. The fixing pin 8 is composed of a cylindrical portion 9a inserted into the holes 7a and 7b of the setter 6, and a cylindrical portion 9b inserted into the slits 4a and 4c of the sagger 1, and can react with the material to be fired. It is preferable that it is made of ZrO ₂ or zirconate as in the case of the above-mentioned setter 6. The size of the fixing pin 8 is determined based on the strength, the amount of thermal expansion, and the like. In this embodiment, the diameter of the cylindrical portion 9a is 5.
8 mm, 2.5 mm in length, and the diameter of the cylindrical portion 9b is 4.
The length is 5 mm, the length is 4 mm, and the overall length is 6.5 mm.

Next, the operation of attaching the setter 6 to the sagger body 1 will be described. The setter 6 shown in FIG. 3 is inserted from the opening sides 5a and 5b of the sagger body 1 shown in FIGS. 1 and 2, and the holes 7a and 7b of the setter 6 communicate with the slits 4a and 4c of the sagger body 1. Position, the so-called setter 6 mounting position. Then, the fixing pin 8 shown in FIG. 4 is inserted into the slit 4a through the hole 7a, and similarly, the other fixing pin 8 is inserted into the slit 4c through the hole 7b. Thereby, the setter 6 can be fixed to the inner surface of the bottom plate 1a of the sagger main body 1 (FIG. 5).
At this time, the setter 6 has a gap between the grooves 3a and 3b of the sagger body 1 and the setter 6, and a gap between the fixing pin 8 and the holes 7a and 7b of the setter 6 and the slits 4a and 4c of the sagger body 1. May move, but there is no major hindrance. Further, since the fixing pins 8 are only inserted into the holes 7a and 7b of the setter 6 and the slits 4a and 4c of the sagger body 1, when the firing sagger 10 is inverted, the fixing pins 8 may fall off. However, since the product is put in and taken out from one of the opening sides 5a and 5b by inclining the firing sagger 10, there is no need to invert the product and the fixing pin 8 does not fall off. still,
When the sagger body 1 is made of Al ₂ O ₃ and the fixing pin 8 is formed of partially stabilized ZrO ₂ containing 4 wt% of CaO, after the heat treatment, the fixing pin 8 and the sagger body 1 are formed.
Because of the difference in the amount of expansion, the fixing pin 8 can be made hard to fall out of the slits 4a and 4b of the sagger 1.

When a problem occurs in either the sagger body 1 or the setter 6, the fixing pin 6 is pulled out, so that the setter 6 is formed in the groove 3 a provided in the sagger body 1.
3b, it can be moved back and forth, and can be easily removed from the sagger body 1.

Next, another embodiment of the present invention is shown in FIGS. 6 is a top view of a setter used in another embodiment, FIG. 7 is a side view of the setter shown in FIG. 6 from the direction of arrow A, and FIG. 8 is an arrow of the setter shown in FIG. It is a side view from the B direction. The sagger body will be described with reference to FIGS. 1 and 2. As shown in the figure, the setter 11 has convex portions 12a so as to correspond to the positions of the slits 4a and 4c of the sagger body 1.
12b. When setting the setter 11 having such a configuration, the setter is inserted into the grooves 3a and 3b provided in the sagger body 1, and the slit 4 of the sagger body 1 is inserted.
The projections 12a and 12b of the setter 11 are matched with the projections 12a and 12b of the setter 11, and the projections 12a and 12b provided on the setter 11 are fitted to the slits 4a and 4c. Also, setter 11
When the sagger is removed from the sagger main body 1, the sagger main body is inverted so that the protrusions 12a and 12b and the slit 4 are removed.
a, 4c are released and the setter 11 is inserted into the grooves 3a, 3c.
What is necessary is just to pull out from b. In this firing sagger, the width (height) of the grooves 3a and 3b formed in the sagger body 1 is set.
Needs to be equal to or greater than the thickness of the setter 11 including the height of the projections 12a and 12b provided on the setter 11. The firing sagger using the setter 11 having the above configuration does not require a fixing pin for mounting the setter,
Further, since it is not necessary to provide a hole in the setter, the number of parts is reduced, and manufacture can be made relatively easily.

[0022]

Next, comparative experiments were performed using the sagger according to the present invention and a conventional sagger. First, as a first embodiment, as shown in FIG. 5, a fixing pin 8 is attached to the inner surface of the bottom plate 1a of the sagger body 1.
Above the setter 4 fixed by the above, a cylindrical object to be fired (barium titanate), 3.2 mm in length and 1.6 in width
A molded body having a height of 1 mm and a height of 1 mm was mounted, and a firing test was performed at 1350 ° C. for 1 hour. In this test, the temperature was raised at a rate of 300 ° C. per hour and 300 ° C. per hour under an atmosphere in the atmosphere. Incidentally, saggers body 1 Al ₂ O ₃ quality content of used is 90wt% Al ₂ O ₃
-Made of SiO ₂ material, the size of which is 15
0 mm, width 150 mm, height 20 mm. The setter 6 is composed of a partially stabilized Zr containing 4 wt% of CaO.
It is composed of O ₂ , its size is 140mm in length and 15 in width.
The thickness is 0 mm and the thickness is 2.5 mm. Further, similarly to the setter 6, the fixing pin 8 is made of partially stabilized ZrO ₂ containing 4% by weight of CaO. The size of the cylindrical portion 9a is 5.8 mm, the length is 2.5 mm, and the cylindrical portion 9b is 4 mm in diameter. .5
mm, length 4 mm and overall length 6.5 mm.

Under the above conditions, a repeated firing test was performed. At the 30th time, cracks occurred in the setter 6. However, there was no problem in use, and the test was continued. The study was discontinued because part of 6 was missing. After the fixing pins 8 were removed and only the setter 6 was replaced with a new setter 6, the firing was further repeated. The discarded setter 6 had a part of the barium titanate component impregnated and deteriorated, and had become fragile. Further, in the 80th firing test (150 times in total) after replacing the setter 6, since the setter 6 was missing again, it was replaced by the same method as described above, and the test was continued. Total 1
The test was stopped at the 80th time because cracks occurred in the sagger body 1. At this time, the setter 6 was usable by being mounted on another sagger main body 1.

Next, as Comparative Example 1, a comparative test was performed using the firing sagger 13 shown in FIGS. Sagger body 13a of the firing sagger 13, the sagger body 1 of embodiments of the same material Al ₂ O ₃ Al quality content is of 90 wt% ₂ O ₃
Is composed of -SiO ₂ quality, also the size similar to the embodiment, length 150 mm, width 150 mm, a height of 20 mm. On the inner surface of the sagger main body 1, 4 wt% of CaO
Spray coat the partially stabilized ZrO ₂ containing
By baking at 50 ° C, a 0.4 mm thick Zr
An O ₂ coating layer 14 is formed. This sagger 1
When a baking test was performed using 3a under the same conditions as in Example 1, a small crack was generated in the bottom plate portion after five uses, and the sagger 13a was still usable, so continued to be used. The cracks generated in the bottom plate portion of the sagger 13a progressed as the number of times increased, and the use was stopped because the length became more than half of the bottom side after 18 uses.

Next, as Comparative Example 2, a comparative test was performed using the firing sagger 15 shown in FIGS. The sagger body 15a of the firing sagger 15, Al ₂ O sagger body 1 and Al ₂ O ₃ quality content of the same material of 90 wt% of Example
_{It is made of 3-} SiO ₂ and has the same size, 150 mm in length, 150 mm in width, and 20 mm in height. Further, slits 16a, 16b, 16 for reducing thermal shock are formed in the bottom plate of the sagger body 15a, and the bottom plate and the side wall.
c and 16d are provided at four places. Slit 16a,
16b, 16c and 16d have a width of 5 mm and a length of 35 m
m, each side is provided at a position that divides each side into 1: 2.7. Further, the inner surface of the sagger body 15a has C
Spray coated partially stabilized ZrO ₂ containing 4 wt% aO and baked at 1450 ° C.
An rO ₂ coating layer 14 is formed. When a firing test was performed using the firing sagger 15 under the same conditions as in the example, the ZrO ₂ coating layer 14 began to peel off near the upper part of the slit after 15 uses, and the coating layer was turned up after 25 uses. The use was discontinued because it became partially missing. No major defect was found in the sagger main body 15a.

From the results of the above comparative tests, the following has become clear. First, unlike the comparative example 1, no slit is formed in the bottom plate portion of the sagger body 13a, and a coating layer 14 of partially stabilized ZrO ₂ having a large heat capacity and containing 4% by weight of CaO is formed on the inner surface of the sagger body 13a. In this case, cracks occurred slightly after the start of the test due to the difference from the coefficient of thermal expansion with the coating layer 14, thermal shock, and the like. On the other hand, when the bottom plate of the sagger main body 15a and the slits 16a, 16b, 16c, and 16d are provided in the bottom plate and the side walls as in Comparative Example 2, the difference between the thermal expansion coefficient of the coating layer 14 and the thermal shock Since the slits 16 a, 16 b, 16 c, and 16 d ease the operation, the number of times of use is longer than that of the first comparative example. However, once the coating layer 14 is turned up, it is impossible to replace the coating layer 14 alone, so that the firing sagger 15
The whole had to be disposed of. On the other hand, in the first embodiment, the bottom plate 1a, the bottom plate
Since the slits 4a, 4b, 4c, and 4d are provided in a and 2b, the thermal shock resistance is excellent, the number of times of use is greater than in Comparative Examples 1 and 2, and even if cracks occur in the sagger 1 or the setter 6, By replacing only one of the cracks, long-term use is possible.

[0027]

As described above, the firing sagger according to the present invention is provided with slits in the bottom plate or the bottom plate and the side walls, so that thermal shock is reduced and cracks or the like generated in the sagger main body are reduced. Can be prevented. Further, since the setter can be fixed to the sagger body by inserting the fixing pin into the slit formed in the sagger body, there is no need to separately provide a hole for inserting the fixing pin, and the manufacturing is easy. be able to. Furthermore, by providing the setter with a protrusion corresponding to the position of the slit in the sagger body, there is no need for a fixing pin to attach the setter to the sagger, and there is no need to provide a hole in the setter, thus reducing the number of parts. , And can be manufactured relatively easily.

Further, since the firing sagger according to the present invention is configured such that the sagger main body and the setter are detachable, if any of the sagger main body or the setter fails during repeated firing. However, by replacing one of the defective units, it can be used continuously. Furthermore, since the unusable sagger body or setter can be separated and collected, the sagger body can be used as a recycled material by a relatively simple process such as pulverization and classification. In particular, the setter can be used as a recycled material when the contamination from the object to be fired is small. Therefore, when compared with a firing sagger in which the sagger main body and the setter cannot be detached, it is possible to increase the number of times each of them can be used and to reuse each of them. It has the effect of being able to do so.

Further, since the sagger body and the setter are integrated during the firing operation, the setter does not fall off even when the sagger is tilted in the work of loading and unloading the object to be fired. In addition, since the sagger body and the setter are integrated with each other, the working efficiency is good, and an effect that automation by a robot or the like can be easily achieved can be achieved. Further, since the fixing pin is made of a hard-to-react material of the same quality as the setter, there is an effect that the fixing pin does not react with the object to be fired.

[Brief description of the drawings]

FIG. 1 is a top view of a sagger main body according to an embodiment of the present invention.

FIG. 2 is a side view of the sagger main body shown in FIG. 1;

FIG. 3 is a top view of the setter according to the embodiment of the present invention.

4A is a side view of a fixing pin according to the embodiment of the present invention, and FIG. 4B is a top view.

FIG. 5 is a side view showing a state where a setter is attached to the sagger body according to the present invention.

FIG. 6 is a top view of a setter according to another embodiment of the present invention.

FIG. 7 is a side view of the setter shown in FIG.

FIG. 8 is a side view of the setter shown in FIG.

9 is a top view of a firing sagger used as Comparative Example 1. FIG.

FIG. 10 is a side view of the firing sagger shown in FIG. 9;

11 is a top view of a firing sagger used as Comparative Example 2. FIG.

FIG. 12 is a side view of the firing sagger shown in FIG. 11;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Sagger body 1a Bottom plate 2a, 2b Side wall 3a, 3b Groove 4a, 4b, 4c, 4d Slit 6 Setter 7a, 7b Hole 8 Fixing pin 10 Sintering sagger

Claims (6)

[Claims] 1. A sagger body made of a refractory excellent in thermal shock resistance, having a bottom plate and side walls on at least two sides of the bottom plate, and having a slit provided in the bottom plate or the bottom plate and the side walls; And a setter formed of a material that does not easily react with the sagger, wherein the setter is inserted into a groove provided below the side wall of the sagger body, and into a slit and a setter provided in the sagger body. A firing sagger, wherein a setter is detachably attached to the sagger body by engaging and disengaging a fixing pin with the provided hole. 2. A sagger body made of a refractory material having excellent thermal shock resistance, having a bottom plate and side walls on at least two sides of the bottom plate, and having a slit provided in the bottom plate or the bottom plate and the side walls. And a setter formed of a material that does not easily react with the sagger, wherein the setter is inserted into a groove provided below a side wall of the sagger main body, and a slit provided in the sagger main body. By fitting the convex part provided in the setter,
A firing sagger, wherein a setter is detachably attached to the sagger body. 3. The firing case according to claim 1, wherein the slit is formed to have a length of 20 to 40% of a side length of the sagger main body bottom plate. Bowls. 4. The sagger body is made of Al ₂ O ₃ , Al ₂
O ₃ -SiO ₂ quality, MgO-Al ₂ O ₃ -SiO ₂ quality,
4. A heat-resistant refractory made of one of SiC and the like, or a mixture of two or more thereof.
A sagger for firing described in any one of the above. 5. The firing sagger according to claim 1, wherein the setter is made of ZrO ₂ or zirconate. 6. The firing sagger according to claim 1, wherein the fixing pin is made of ZrO ₂ or zirconate of the same material as the setter. .