A component applied to a part that comes into contact with molten glass, and a method for manufacturing the same.

Abstract

Provided is a member which is applied, at a glass manufacturing facility, to a part in contact with molten glass. The member has: a refractory brick that has a first surface and a second surface and that has a porosity in the range of 10%-30%; a glass component filled on the first surface side of the refractory brick; and a metal film including platinum, provided on the first surface or the second surface of the refractory brick. The total amount of alumina and silica in the refractory brick is 50 mass% or more. The greatest penetration depth of the glass component from the first surface is 2000 μm or more.

Description

[Technical Field]

[0001] The present invention relates to a component applied to a part that comes into contact with molten glass in a glass manufacturing facility, and to a method for manufacturing the same. [Background technology]

[0002] Glass manufacturing facilities for producing glass products are equipped with multiple devices such as melting furnaces, clarifying furnaces, and molding machines. In such equipment, refractory bricks are typically used for components that come into contact with the high-temperature molten glass.

[0003] However, refractory bricks do not have sufficient resistance to molten glass. Therefore, when refractory bricks are used for extended periods, problems often arise such as the bricks being eroded or components of the refractory bricks leaching into the molten glass, which can degrade the quality of the glass product.

[0004] To address these problems, it has been proposed to use platinum, which has good resistance to molten glass, for components that come into contact with molten glass (for example, Patent Documents 1 and 2). [Prior art documents] [Patent Documents]

[0005] [Patent Document 1] Japanese Patent Publication No. 2012-121740 [Patent Document 2] International Publication No. WO2012 / 070508 [Overview of the project] [Problems that the invention aims to solve]

[0006] It is known that when molten glass comes into contact with platinum, bubbles are generated within the molten glass.

[0007] This is presumed to be because the water contained in the high-temperature molten glass decomposes into hydrogen and oxygen when it comes into contact with platinum. In other words, the generated hydrogen permeates the platinum and is released out of the system through the pores of the refractory brick. However, oxygen does not easily permeate platinum and remains in the molten glass, resulting in the formation of bubbles.

[0008] If such air bubbles remain in the molten glass, it can lead to a decrease in the quality of the glass products that are manufactured.

[0009] To address this problem, electroformed bricks could be used as refractory bricks. Generally, electroformed bricks have a low porosity of a few percent or less, and therefore, if platinum-coated electroformed bricks are used in the area in contact with molten glass, hydrogen permeation is expected to be less likely to occur. However, electroformed bricks are susceptible to thermal shock and are not suitable for use in equipment that undergoes repeated heating and cooling.

[0010] Thus, when attempting to apply platinum to components that come into contact with high-temperature molten glass in glass manufacturing equipment, many problems can arise.

[0011] This invention has been made in view of the above background, and aims to provide a component that is applied to a part that comes into contact with molten glass, is resistant to thermal shock, and can significantly suppress the generation of bubbles. Furthermore, this invention aims to provide a method for manufacturing such a component. [Means for solving the problem]

[0012] In this invention, A component applied to a part that comes into contact with molten glass in glass manufacturing equipment, A refractory brick having a first surface and a second surface, with a porosity in the range of 10% to 30%, The glass component filled on the first surface side of the firebrick, A metal film containing platinum, which is installed on the first surface or the second surface of the refractory brick; having; the refractory brick has a total amount of alumina and silica of 50% by mass or more; a member is provided in which a maximum penetration depth of the glass component from the first surface is 2000 μm or more.

[0013] Also, in the present invention, a method for manufacturing a member applied to a portion in contact with molten glass in glass manufacturing equipment, comprising: (1) a step of installing a glass raw material on the first surface of a refractory brick having a first surface and a second surface, the total amount of alumina and silica being 50% by mass or more, and the porosity being in the range of 10% to 30%; (2) a step of melting the glass raw material to form molten glass and impregnating the molten glass from the first surface of the refractory brick, wherein the molten glass is impregnated so that a maximum penetration depth from the first surface is 2000 μm or more; (3) a step of removing the glass raw material remaining on the first surface after the molten glass has solidified; (4) a step of installing a metal film containing platinum on the first surface or the second surface of the refractory brick; A manufacturing method is provided that has.

Advantages of the Invention

[0014] In the present invention, it is possible to provide a member applied to a portion in contact with molten glass, which is resistant to thermal shock and can significantly suppress the generation of bubbles. Also, in the present invention, a method for manufacturing such a member can be provided.

Brief Description of the Drawings

[0015] [Figure 1] It is a cross-sectional view schematically showing the configuration of a member according to an embodiment of the present invention. [Figure 2] It is a cross-sectional view schematically showing the configuration of a member according to another embodiment of the present invention. [Figure 3] This diagram schematically shows a flow chart of a method for manufacturing components for glass manufacturing equipment according to one embodiment of the present invention. [Figure 4] This diagram schematically shows one step in a method for manufacturing components for glass manufacturing equipment according to one embodiment of the present invention. [Figure 5] This diagram schematically shows one step in a method for manufacturing components for glass manufacturing equipment according to one embodiment of the present invention. [Figure 6] This diagram schematically shows one step in a method for manufacturing components for glass manufacturing equipment according to one embodiment of the present invention. [Figure 7] This diagram schematically shows one step in a method for manufacturing components for glass manufacturing equipment according to one embodiment of the present invention. [Figure 8] This figure shows an example of the Si mapping results in the cross-section of a refractory brick before laser processing, according to Example 3. [Figure 9] This figure shows an example of the Si mapping results in the cross-section of a refractory brick before laser processing according to Example 11. [Figure 10] This is a photograph showing the condition of various types of refractory bricks after thermal shock testing. [Modes for carrying out the invention]

[0016] The following describes one embodiment of the present invention.

[0017] In one embodiment of the present invention, A component applied to a part that comes into contact with molten glass in glass manufacturing equipment, A refractory brick having a first surface and a second surface, with a porosity in the range of 10% to 30%, The glass component filled on the first surface side of the firebrick, A metal film containing platinum is placed on the first or second surface of the refractory brick, It has, The aforementioned refractory brick has a total amount of alumina and silica of 50% by mass or more. A member is provided in which the maximum penetration depth of the glass component from the first surface is 2000 μm or more.

[0018] As mentioned above, when platinum is placed on top of refractory bricks to form a component, there is a problem in that bubbles are generated in the molten glass due to the decomposition of water and dissipation of hydrogen caused by contact between the platinum and the molten glass.

[0019] Furthermore, if electroformed bricks with low porosity are used as refractory bricks to address this void problem, there is a problem that the electroformed bricks may be damaged by thermal shock when the equipment is repeatedly heated and cooled.

[0020] In contrast, in one embodiment of the present invention, the member comprises a refractory brick having a porosity in the range of 10% to 30%, and a platinum-containing metal film placed on a first or second surface of the refractory brick.

[0021] When such a component is applied to the part that comes into contact with molten glass, the presence of the metal film can significantly suppress problems such as the refractory brick being eroded by the molten glass or its components leaching out.

[0022] Furthermore, the component according to one embodiment of the present invention has a metal film. Therefore, when the component comes into contact with high-temperature molten glass, the aforementioned water decomposition reaction may occur.

[0023] However, in one embodiment of the present invention, the pores on the first surface side of the refractory brick are filled with glass components. In particular, in one embodiment of the present invention, the glass components penetrate to a depth of up to 2000 μm or more from the first surface of the refractory brick.

[0024] In this case, the glass component can be used as a barrier to hydrogen diffusion. That is, even if a water decomposition reaction occurs between the metal film and the molten glass, the glass component in the refractory brick can significantly suppress the release of the generated hydrogen through the refractory brick into the system. As a result, the water decomposition reaction can be suppressed, and the generation of oxygen gas bubbles can be significantly suppressed.

[0025] Furthermore, in the component according to one embodiment of the present invention, the refractory brick is made of a material having a porosity in the range of 10% to 30% and a total amount of silica and alumina of 50% by mass or more.

[0026] Unlike conventional electroformed bricks, these refractory bricks have the property of being highly resistant to thermal shock. Therefore, in one embodiment of the present invention, even when the components are subjected to repeated heating and cooling, deterioration and damage of the refractory bricks can be significantly suppressed.

[0027] Due to the effects described above, one embodiment of the present invention provides a component that is highly resistant to thermal shock and can significantly suppress the generation of bubbles.

[0028] Furthermore, as described in Patent Document 1, when a platinum plate is placed on the surface of a refractory brick to form a component, a problem may arise in which the platinum plate deforms due to the difference in thermal expansion between the refractory brick and the platinum when the component is heated or cooled. Once such deformation occurs in the platinum plate, the deformation may damage the platinum plate, making it difficult to protect the refractory brick from molten glass.

[0029] However, in the component according to one embodiment of the present invention, platinum is provided as a "metal film." In this case, even if the component is heated or cooled and deformation occurs in the refractory brick, the metal film can follow the deformation of the refractory brick. Therefore, in the component according to one embodiment of the present invention, the refractory brick can be protected by the metal film over a long period of time.

[0030] (Component for glass manufacturing equipment according to one embodiment of the present invention) Next, with reference to the drawings, the configuration of components for a glass manufacturing facility according to one embodiment of the present invention will be described in more detail.

[0031] Figure 1 schematically shows a cross-section of a component for glass manufacturing equipment (hereinafter referred to as the "first component") according to one embodiment of the present invention.

[0032] As shown in Figure 1, the first member 100 has a refractory brick 110, a glass component 120, and a metal film 130.

[0033] The refractory brick 110 has a first surface 112 and a second surface 114 that are opposite to each other. The refractory brick 110 has a composition such that the total amount of silica and alumina is 50% by mass or more.

[0034] The glass component 120 is placed on the side of the first surface 112 of the refractory brick 110. More specifically, the glass component 120 is placed so as to fill at least some of the pores present on and near the first surface 112 of the refractory brick 110.

[0035] The metal film 130 is placed on the first surface 112 of the refractory brick 110. The metal film 130 contains platinum and serves to protect the refractory brick 110 from molten glass.

[0036] In the example shown in Figure 1, a plurality of recesses 140 are formed on the first surface 112 of the refractory brick 110, and the metal film 130 is also filled into these recesses 140.

[0037] By providing such recesses 140, the adhesion between the metal film 130 and the first surface 112 of the refractory brick 110 can be improved.

[0038] However, this is just one example, and the recess 140 does not necessarily need to be provided.

[0039] Here, the first member 100 has a refractory brick 110, which has a porosity in the range of 10% to 30%. Unlike electroformed bricks with low porosity, such a refractory brick 110 has relatively good thermal shock resistance. Therefore, the first member 100 can be appropriately applied to devices that undergo repeated heating and cooling.

[0040] Furthermore, the first member 100 has glass components 120 that fill the pores of the refractory brick 110. The glass components 120 extend to a depth of up to 2000 μm or more from the first surface 112 of the refractory brick 110.

[0041] Furthermore, the maximum distance in the depth direction of the glass component 120 from the first surface 112 of the refractory brick 110 is referred to as "maximum depth D" below. max It is called ". In the first member 100, the maximum depth D max The size is ≥2000 μm.

[0042] Such glass component 120 functions as a barrier against hydrogen permeation. Therefore, although the first member 100 has a platinum-containing metal film 130 and a refractory brick 110 with a porosity in the range of 10% to 30%, it can significantly suppress the release of hydrogen produced by the decomposition reaction of water during contact between the molten glass and the metal film 130, which permeates through the refractory brick 110 and is released outside the system.

[0043] As a result, it is believed that the decomposition reaction of water in molten glass can be significantly suppressed, and the generation of oxygen gas as bubbles in molten glass can be significantly suppressed.

[0044] As a result of the above effects, the first component 100 can achieve good thermal shock resistance and significantly suppress the generation of bubbles when it comes into contact with molten glass.

[0045] Furthermore, in the first member 100, platinum is used in the form of a metal film 130. In this case, even if the first member 100 is rapidly heated or rapidly cooled, causing deformation of the refractory brick 110, the metal film 130 can follow the deformation of the refractory brick 110.

[0046] Furthermore, the refractory brick 110 is composed of silica and / or alumina-based materials. Such a refractory brick 110 has a smaller difference in thermal expansion with platinum compared to, for example, a refractory brick containing zircon, and therefore significantly reduces the possibility of peeling of the metal film 130 during use.

[0047] (Each component of the member according to one embodiment of the present invention) Next, we will describe each component of the member according to one embodiment of the present invention having the characteristics described above.

[0048] For clarity, in the following description, the first component 100 mentioned above will be used as an example of a component according to one embodiment of the present invention to explain each component. Therefore, the reference numerals shown in Figure 1 will be used to represent each component.

[0049] (Firebrick 110) The type of refractory brick 110 is not particularly limited, as long as it possesses the characteristics described above. For example, refractory brick 110 may be a sintered brick. Generally, sintered bricks have better workability and are more resistant to thermal shock than electroformed bricks.

[0050] The refractory brick 110 may be composed of alumina-based, silica-based, or alumina-silica-based ceramics.

[0051] If the refractory brick 110 is alumina-based, the refractory brick 110 contains at least 50% by mass of alumina. The amount of alumina may be, for example, 60% by mass or more, and may also be 70% by mass or more. The amount of alumina may also be 100% by mass.

[0052] If the refractory brick 110 is silica-based, the refractory brick 110 contains at least 50% by mass of silica. The amount of silica may be, for example, 60% by mass or more, and may also be 70% by mass or more. The amount of silica may also be 100% by mass.

[0053] Furthermore, if the refractory brick 110 is of the alumina-silica type, the total amount of alumina and silica in the refractory brick 110 is at least 50% by mass. The total amount of alumina and silica may be, for example, 60% by mass or more, and may be 70% by mass or more. Alternatively, the total amount of alumina and silica in the refractory brick 110 may be 100% by mass. In this case, the amount of silica may be in the range of 10% by mass to 40% by mass.

[0054] The porosity of refractory brick 110 is in the range of 10% to 30%, and preferably 20% or less.

[0055] (Glass component 120) The composition of the glass component 120 that fills the pores of the refractory brick 110 is not particularly limited.

[0056] However, it is preferable that the glass component 120 is glass in which the amount of alkaline components is suppressed. For example, in the glass component 120, it is preferable that the total amount of lithium, sodium, and potassium is 5% by mass or less in terms of oxides.

[0057] By suppressing the amount of alkaline components, the reaction between the refractory brick and glass component 120 can be significantly inhibited.

[0058] Furthermore, it is preferable that the glass component 120 has properties that prevent its position from shifting significantly during use of the first member 100. For example, the glass component 120 has properties that prevent it from shifting significantly at 1400°C. 2 ~10 4 It may have Poise viscosity.

[0059] Maximum penetration depth D for glass component 120 maxThe maximum penetration depth D is at least 2000 μm. max By setting it to 2000 μm or more, the permeation of hydrogen within the refractory brick 110 can be significantly suppressed.

[0060] In the pores within the refractory brick 110, there are open pores that can be in gas communication with the first surface 112 and / or the second surface 114, and closed pores that are not in communication with either surface 112, 114. Among these, the closed pores are not involved in the movement of hydrogen in the first place. Therefore, it is sufficient to fill only the open pores with the glass component 120.

[0061] Also, regarding the open pores, it is not necessary to fill all the open pores in the region from the first surface 112 to the maximum penetration depth D max with the glass component 120.

[0062] According to the experience of the inventors of the present application, although it depends on the composition of the glass component 120, when the maximum penetration depth D max is 5000 μm, among the open pores in the region with a depth of 5000 μm from the surface, it is considered that about 30% or more of the open pores are sealed, and the open pores communicating from the first surface to the second surface are substantially non-existent.

[0063] The maximum penetration depth D max is preferably 3000 μm or more, more preferably 5000 μm or more, and even more preferably 8000 μm or more.

[0064] (Metal film 130) As long as the metal film 130 contains 50% by mass or more of platinum, its composition is not limited. For example, the metal film 130 may be composed of platinum or a platinum alloy. The platinum alloy may be a platinum - gold alloy, a platinum - rhodium alloy, or a platinum - iridium alloy, etc.

[0065] The metal film 130 may be a sprayed film.

[0066] The thickness of the metal film 130 is not particularly limited. The metal film 130 may have a thickness in the range of, for example, 100 μm to 700 μm.

[0067] Furthermore, if the first member 100 has a recess 140 as shown in Figure 1, and a component of the metal film 130 is present in the recess 140, the thickness of the metal film 130 is expressed as the dimension to the bottom of the recess 140.

[0068] The form of the recess 140 is not particularly limited, and the recess 140 may be, for example, a groove extending in one direction, or a substantially circular hole. Such a recess 140 may be formed by laser processing.

[0069] The depth of the recess 140 may be, for example, in the range of 100 μm to 500 μm. The aspect ratio of the recess 140 may also be in the range of 0.5 to 2.0. Here, the aspect ratio of the recess 140 is expressed as the depth of the recess 140 relative to the minimum width (or diameter in the case of a hole) of the recess 140.

[0070] However, as mentioned above, the recess 140 may be omitted.

[0071] (First member 100) The first component 100 is applied to a part of a glass manufacturing facility that may come into contact with molten glass.

[0072] Such parts may include, for example, a melting furnace, a clarifying furnace, a supply pipe for molten glass, and / or part of a molding apparatus.

[0073] In particular, in glass manufacturing equipment, the process of removing air bubbles from molten glass is often not performed downstream of the clarification furnace. Therefore, it is preferable that the first component 100 be applied to equipment located downstream of the clarification furnace, such as a molding apparatus.

[0074] (Component for glass manufacturing equipment according to another embodiment of the present invention) Next, with reference to Figure 2, the configuration of components for glass manufacturing equipment according to another embodiment of the present invention will be described.

[0075] Figure 2 schematically shows a cross-section of a component for glass manufacturing equipment according to another embodiment of the present invention (hereinafter referred to as the "second component").

[0076] As shown in Figure 2, the second member 200 has a refractory brick 210, a glass component 220, and a metal film 230.

[0077] In the second member 200, the refractory brick 210 and the glass component 220 have the same configuration as the refractory brick 110 and the glass component 120 in the first member 100, respectively. However, in the second member 200, the arrangement of the metal film 230 is different from that of the first member 100.

[0078] In other words, in the second member 200, the metal film 230 is installed on the second surface 214 side of the refractory brick 210, rather than on the first surface 212 side. Furthermore, the multiple recesses 240 are formed on the second surface 214 of the refractory brick 210. However, as mentioned above, the recesses 240 are not necessarily required.

[0079] The second member 200 is used such that the side with the metal film 230 is in contact with the molten glass.

[0080] It will be obvious to those skilled in the art that the same effects as those of the first member 100 can be obtained with the second member 200.

[0081] In other words, the second member 200 also exhibits good thermal shock resistance and significantly suppresses the generation of bubbles when it comes into contact with molten glass.

[0082] (Method for manufacturing components for glass manufacturing equipment according to one embodiment of the present invention) Next, with reference to Figures 3 to 7, an example of a method for manufacturing components for glass manufacturing equipment according to one embodiment of the present invention will be described.

[0083] Figure 3 schematically shows a flow of a method for manufacturing components for glass manufacturing equipment according to one embodiment of the present invention (hereinafter referred to as the "first method"). As shown in Figure 3, the first method is The process includes setting glass raw materials on the first surface of a refractory brick having a first surface and a second surface, with a total amount of alumina and silica of 50% by mass or more, and a porosity in the range of 10% to 30% (process S110), The process involves melting glass raw materials to form molten glass, and then impregnating the first surface of the refractory brick with the molten glass (process S120), After the molten glass has solidified, the process involves removing any remaining glass raw material from the first surface (step S130), The process involves applying a platinum-containing metal film to the first surface of the refractory brick (process S140), It has.

[0084] The following explains each step, referring to Figures 4 through 7.

[0085] For clarity, the first component 100 shown in Figure 1 is assumed to be the component to be manufactured. Therefore, the reference numerals shown in Figure 1 are used to represent each component of the component.

[0086] (Step S110) First, firebrick 110 is prepared.

[0087] As mentioned above, refractory brick 110 is composed of a material in which the total amount of silica and alumina is 50% by mass or more, and the porosity is in the range of 10% to 30%. Refractory brick 110 may also be composed of silica-based, alumina-based, or silica-alumina-based ceramics.

[0088] The refractory brick 110 may also be a sintered brick.

[0089] The refractory brick 110 has an initial first surface 116 and an initial second surface 118.

[0090] Next, glass raw material is placed on the initial first surface 116 of the refractory brick 110.

[0091] Figure 4 schematically shows the state in which the glass material 122 is placed on the initial first surface 116 of the refractory brick 110.

[0092] The glass raw material 122 comprises glass frit, a binder, and a solvent (e.g., water). The glass raw material 122 may be provided, for example, in the form of a paste.

[0093] (Process S120) Next, the glass raw material 122 is subjected to a melting process. The temperature and time of the melting process are appropriately determined based on the composition of the glass frit contained in the glass raw material 122.

[0094] During the melting process, when the glass raw material 122 is heated to a high temperature, the solvent vaporizes and the glass frit melts. The binder either vaporizes with the solvent or melts with the glass frit. The molten glass frit penetrates into the interior of the refractory brick 110 from the initial first surface 116. As a result, the glass component 120 impregnates the pores present on and near the initial first surface 116 of the refractory brick 110.

[0095] Figure 5 schematically shows the state in which the glass component 120 is impregnated into the pores of the refractory brick 110.

[0096] Furthermore, it is not necessary for all of the glass component 120 formed from the glass raw material 122 to be impregnated into the pores of the refractory brick 110. That is, as shown in Figure 5, a portion of the glass component 120 may remain on the initial first surface 116 of the refractory brick 110 as a glass layer 124.

[0097] Subsequently, the glass component 120 solidifies.

[0098] (Step S130) Next, the glass layer 124 remaining on the initial first surface 116 of the refractory brick 110 is removed.

[0099] The glass layer 124 may be removed from the initial first surface 116 of the refractory brick 110 by mechanical polishing. In this process, the initial first surface 116 of the refractory brick 110 may also be polished, forming a polished surface. This polished surface may become the new surface (first surface 112) of the refractory brick 110.

[0100] This results in a refractory brick 110 in which at least a portion of the pores near the first surface 112 (or initial first surface 116) are filled with glass component 120, as shown in Figure 6.

[0101] Maximum penetration depth D of the glass component 120 from the first surface 112 max It is 2000 μm or larger.

[0102] (Process S140) Next, a metal film 130 is applied to the first surface 112 of the refractory brick 110. However, a recess 140 may be formed on the first surface 112 before this process.

[0103] Figure 7 schematically shows a state in which a recess 140 is formed on the first surface 112 of the refractory brick 110.

[0104] The recesses 140 may be a plurality of grooves extending in a certain direction, or a plurality of circular holes, etc. When viewed from above, these recesses 140 may have a regular two-dimensional arrangement, or they may be arranged randomly.

[0105] The minimum width of the recess 140 may be, for example, in the range of 100 μm to 200 μm. Furthermore, the aspect ratio, expressed as the depth of the recess relative to the minimum width of the recess, may be in the range of 0.5 to 2.0.

[0106] The recess 140 may be formed, for example, by laser processing.

[0107] The formation of the recess 140 is optional.

[0108] Next, a metal film 130 is applied to the first surface 112 of the refractory brick 110. As mentioned above, the metal film 130 contains platinum.

[0109] The method of installing the metal film 130 is not particularly limited. The metal film 130 may be deposited, for example, by thermal spraying.

[0110] The thickness of the metal film 130 is, for example, in the range of 100 μm to 500 μm.

[0111] By following the above steps, the first component 100, as shown in Figure 1 above, can be manufactured. Note that if the first method does not include a step for polishing the initial second surface 118 of the refractory brick 110, the initial second surface 118 becomes the second surface 114 of the refractory brick 110.

[0112] The method for manufacturing a component according to one embodiment of the present invention has been described above, using the first method as an example. However, it will be obvious to those skilled in the art that the component according to one embodiment of the present invention may be manufactured by other methods.

[0113] For example, if the metal film 130 is formed on the initial second surface 118 of the refractory brick 110 in the aforementioned process S140, a second member 200 as shown in Figure 2 can be manufactured. Various other modifications are also possible. [Examples]

[0114] Next, examples of the present invention will be described. In the following description, Examples 1 to 5 are examples, and Examples 11 to 12 are comparative examples.

[0115] (Example 1) The evaluation components were fabricated using the first method described above.

[0116] The dimensions of the firebrick were set at 50mm in length, 50mm in width, and 15mm in thickness. One surface measuring 50mm x 50mm was referred to as the first surface.

[0117] For the refractory bricks, we used refractory brick A with the composition shown in Table 1 below.

[0118] [Table 1] This refractory brick A is a sintered brick with a porosity of 16%.

[0119] Next, the refractory bricks were filled with glass components using the following method.

[0120] First, a glass paste was applied to the first surface of the refractory brick. The glass paste contained water, a binder, and glass frit. The glass contained in the glass frit is referred to as glass A. The composition and softening point of glass A are shown in Table 2 below.

[0121] [Table 2] Next, the refractory bricks were heated to 1450°C in the atmosphere, held at this temperature for 3 hours, and then slowly cooled. This filled the pores near the first surface of the refractory bricks with glass A.

[0122] Subsequently, the glass layer remaining on the first surface of the refractory brick was removed by mechanical polishing.

[0123] Next, numerous circular holes were formed in a staggered arrangement on the first surface of the refractory brick using a laser processing method. The diameter of the holes was approximately 300 μm, and the depth was approximately 300 μm. Therefore, the aspect ratio of the holes was approximately 1.0.

[0124] Next, a platinum film was deposited on the first surface of the refractory brick by flame spraying. The thickness of the platinum film was approximately 300 μm.

[0125] This resulted in obtaining an evaluation component (hereinafter referred to as "Sample 1").

[0126] (Example 2) An evaluation component was manufactured using the same method as in Example 1. However, in Example 2, glass B was used as the glass contained in the glass frit. The composition and softening point of glass B are shown in Table 2 above.

[0127] Hereafter, the evaluation component that was fabricated will be referred to as "Sample 2".

[0128] (Example 3) An evaluation component was manufactured using the same method as in Example 1. However, in Example 3, glass C was used as the glass contained in the glass frit. The composition and softening point of glass C are shown in Table 2 above.

[0129] Hereafter, the evaluation component that was fabricated will be referred to as "Sample 3".

[0130] (Example 4) Evaluation samples were prepared using the same method as in Example 1. However, in Example 4, refractory brick B, a type of sintered brick, was used as the refractory brick. The composition and porosity of refractory brick B are shown in Table 1 above. In Example 4, glass C was used as the glass contained in the glass frit.

[0131] Hereafter, the evaluation component that was fabricated will be referred to as "Sample 4".

[0132] (Example 5) Evaluation samples were prepared using the same method as in Example 1. However, in Example 5, glass D was used as the glass contained in the glass frit. The composition and softening point of glass D are shown in Table 2 above.

[0133] Hereafter, the evaluation component that was prepared will be referred to as "Sample 5".

[0134] (Example 11) Evaluation samples were prepared using the same method as in Example 1. However, in Example 11, the refractory bricks were not filled with glass components. That is, without applying glass paste, the first surface of the refractory bricks was laser-processed, and then a platinum film was sprayed to prepare the evaluation samples.

[0135] Hereafter, the evaluation component that was prepared will be referred to as "Sample 11".

[0136] (Example 12) Evaluation samples were manufactured using the same method as in Example 1. However, in Example 12, the amount of glass paste applied during the glass component filling process was reduced to 1 / 10 of that in Example 1.

[0137] Hereafter, the evaluation component that was prepared will be referred to as "Sample 12".

[0138] (Measurement of penetration depth of glass components) In each of the aforementioned examples, the penetration depth of the glass component from the first surface of the fire-resistant glass was measured before processing the circular holes with a laser.

[0139] The measurement was performed by taking EPMA mapping images of silicon (Si) at the cross-section obtained by cutting each refractory brick in a direction parallel to the thickness direction. Specifically, the distance from the first surface of the refractory brick to the maximum depth where the glass component is present was determined using the Si mapping image. The obtained distance was defined as the maximum depth D of the glass component. max That's what I decided.

[0140] Figure 8 shows an example of a Si mapping image in the cross-section of a refractory brick before laser processing according to Example 3. Figure 9 also shows an example of a Si mapping image in the cross-section of a refractory brick before laser processing according to Example 11.

[0141] As is clear from Figure 9, no glass components are observed in the depth direction of the refractory brick in Example 3. In contrast, Figure 8 shows that in the refractory brick in Example 3, glass components are filled to a depth of at least 2000 μm from the surface.

[0142] Table 3 shows the type of refractory brick, the type of glass used for filling, and the maximum depth D of the glass component in each sample. max This is a summary of the information presented.

[0143] [Table 3] Table 3 shows that in Samples 1 to 5, the maximum penetration depth D of the glass component was max It was found that the maximum penetration depth D was at least 2000 μm. On the other hand, in sample 12, the maximum penetration depth D max The size was less than 1000 μm.

[0144] (evaluation) (Fused glass contact test) A molten glass contact test was performed using each sample.

[0145] This test was conducted as follows:

[0146] First, a disc-shaped glass block was placed on the surface of the platinum film sample. Glass B was used for the glass block.

[0147] Next, the sample was heated to 1400°C in air to melt the glass block. The contact area of ​​the molten glass with the platinum film was approximately 150 mm². 2 The sample temperature was maintained at 1400°C, and the state of the molten glass, particularly the presence or absence of bubbles, was observed. The holding time at 1400°C was approximately 120 minutes.

[0148] (Thermal cycle test) Thermal cycling tests were conducted using each sample.

[0149] The thermal cycling test involved heating each sample to 1400°C, holding it at this temperature for 10 minutes, and then air-cooling it. This cycle was repeated three times. The test was conducted in air.

[0150] After the test, the condition of the samples was evaluated. In particular, the presence or absence of damage to the refractory bricks and the presence or absence of delamination of the platinum film were assessed.

[0151] (result) Table 4 below summarizes the results of each evaluation test.

[0152] [Table 4] As shown in Table 4, many bubbles were generated in the molten glass contact test for samples 11 and 12. In contrast, no bubbles were generated in samples 1 to 4 during the molten glass contact test. Furthermore, only a small amount of bubbles were generated in sample 5.

[0153] Thus, the maximum penetration depth D of the glass component max It was confirmed that the generation of bubbles was significantly suppressed by setting the particle size to 2000 μm or more.

[0154] Furthermore, in sample 11, delamination of the platinum film occurred after the thermal cycling test. In contrast, no delamination of the platinum film was observed in samples 1 to 4 after the thermal cycling test. No particular abnormalities were observed in the refractory bricks either.

[0155] Thus, it was confirmed that samples 2 to 4 possessed good thermal shock resistance.

[0156] (Additional exam) A thermal shock test was conducted using multiple refractory bricks.

[0157] The thermal shock test was conducted by heating each refractory brick to 1300°C in air, and then immersing it in 25°C water.

[0158] Three types of firebricks, I to III, were used. All firebricks had dimensions of 40mm (length) x 40mm (width) x 100mm (thickness).

[0159] Table 5 below summarizes the composition of the refractory bricks used.

[0160] [Table 5] Refractory brick I corresponds to the aforementioned refractory brick A and is an alumina-based sintered brick. Refractory brick II is a zirconia-based sintered brick. Refractory brick III is a zirconia-based electroformed brick (porosity 1%).

[0161] Figure 10 summarizes the condition of each refractory brick after the thermal shock test.

[0162] Figure 10 shows that large cracks have formed in refractory brick III. Cracks were also observed in some parts of refractory brick II.

[0163] In contrast, no abnormalities such as cracks were observed in refractory brick I after the test.

[0164] Thus, it was found that alumina-based sintered bricks have better thermal shock resistance compared to electroformed bricks and non-alumina-based sintered bricks.

[0165] This application claims priority based on Japanese Patent Application No. 2021-060625, filed on 31 March 2021, and the entire contents of the said Japanese application are incorporated herein by reference. [Explanation of Symbols]

[0166] 100 Component according to one embodiment of the present invention (first component) 110 Firebricks 112 First surface 114 Second surface 116 Initial first surface 118 Initial second surface 120 Glass components 122 Glass raw materials 124 glass layer 130 Metal film 140 recess 200 Component according to one embodiment of the present invention (second component) 210 Firebricks 212 First surface 214 Second surface 220 Glass components 230 Metal film 240 recess

Claims

1. A component applied to a part that comes into contact with molten glass in glass manufacturing equipment, A refractory brick having a first surface and a second surface, with a porosity in the range of 10% to 30%, The glass component filled on the first surface side of the firebrick, A metal film containing platinum is placed on the first surface of the refractory brick, It has, The aforementioned refractory brick has a total amount of alumina and silica of 50% by mass or more. The maximum penetration depth of the glass component from the first surface is 2000 μm or more. The aforementioned metal film is a thermal spray film. The material wherein the viscosity of the glass component at 1400°C is 10² to 10⁴ Poise.

2. The refractory brick is an alumina-based refractory brick containing 50% by mass or more of alumina, as described in claim 1.

3. The member according to claim 1 or 2, wherein the refractory brick is a sintered brick.

4. The member according to any one of claims 1 to 3, wherein the metal film has a thickness in the range of 100 μm to 700 μm.

5. The member according to any one of claims 1 to 4, wherein the metal film is composed of platinum or a platinum alloy.

6. The member according to any one of claims 1 to 5, wherein the softening point of the glass component is 821°C to 1068°C.

7. The member according to any one of claims 1 to 6, wherein the metal film is installed on the first surface of the refractory brick.

8. The member according to any one of claims 1 to 7, wherein the surface of the refractory brick on which the metal film is installed has a recess.

9. A method for manufacturing a component applied to a part that comes into contact with molten glass in a glass manufacturing facility, (1) A step of placing glass raw material on the first surface of a refractory brick having a first surface and a second surface, having a total amount of alumina and silica of 50% by mass or more, and having a porosity in the range of 10% to 30%, (2) A step of melting the glass raw material to form molten glass, and impregnating the refractory brick with the molten glass from the first surface, wherein the molten glass is impregnated such that the maximum penetration depth from the first surface is 2000 μm or more. (3) A step of removing the glass raw material remaining on the first surface after the molten glass has solidified, (4) A step of installing a metal film containing platinum on the first surface or the second surface of the refractory brick, A manufacturing method having the following characteristics.

10. The manufacturing method according to claim 9, wherein the refractory brick is an alumina-based refractory brick containing 50% by mass or more of alumina.

11. The manufacturing method according to claim 9 or claim 10, wherein the refractory brick is a sintered brick.

12. The manufacturing method according to any one of claims 9 to 11, wherein the metal film has a thickness in the range of 100 μm to 700 μm.

13. The manufacturing method according to any one of claims 9 to 12, wherein the metal film is composed of platinum or a platinum alloy.

14. The manufacturing method according to any one of claims 9 to 13, wherein the metal film is formed by thermal spraying.

15. Furthermore, the manufacturing method according to any one of claims 9 to 14, further comprising the step of forming a recess on the surface on which the metal film is to be installed, prior to step (4) above.

16. The manufacturing method according to any one of claims 9 to 15, wherein the metal film is installed on the first surface of the refractory brick.

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