Atmosphere box-type furnace for sintering electrolyte
By sealing the heating rod in a box furnace in a quartz or alumina ceramic casing and heating the protective gas with the sleeve, the corrosion and uneven temperature field problems in the traditional box furnace sintering the sulfide solid electrolyte are solved, and a better sintering effect is achieved.
Patent Information
- Application Number
- CN202421451078.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-24
- Publication Date
- 2025-05-06
- Estimated Expiration
- 2034-06-24
AI Technical Summary
When sintering sulfide solid electrolytes, traditional box furnaces are prone to corrosion in the furnace body and heating part, and the uneven temperature field leads to uneven material properties.
An atmospheric box furnace for electrolyte sintering is designed. By sealing the heating rod in a quartz or alumina ceramic sleeve to prevent corrosion, and using the sleeve as an intake pipe, the protective gas is heated by the heating rod to prevent the air conditioner from disturbing the temperature field.
It effectively prevents corrosion of the heating rod, improves the uniformity and stability of the temperature field in the furnace, and thus improves the sintering effect of the electrolyte.
Smart Images
Figure CN222837343U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of box-type furnaces, in particular to an atmosphere box-type furnace for electrolyte sintering. Background Art
[0002] Sulfide solid electrolyte is the key raw material of sulfide all-solid-state batteries. Its performance plays a decisive role in the performance of all-solid-state batteries, and its laboratory production is a prerequisite for mass production of all-solid-state batteries. Sulfide solid electrolyte is sensitive to water and oxygen, and needs to be sintered in a vacuum tube during laboratory sintering. This method has two disadvantages: 1) Quartz tubes are disposable consumables, which leads to increased experimental costs; 2) The size of quartz tubes is limited and cannot be scaled up. If the material is placed directly in an ordinary box furnace for sintering, there are also two disadvantages: 1) The sulfur volatilization during the sintering process corrodes the furnace body; 2) The temperature of the protective gas introduced is low, resulting in a chaotic temperature field in the furnace, and uneven temperature causes uneven material properties. Utility Model Content
[0003] The utility model provides an atmosphere box-type furnace for electrolyte sintering, aiming to solve the problem that the furnace body and the heating part are easily corroded when the box-type furnace in the traditional technology sinters the electrolyte.
[0004] In view of the problems existing in the prior art, the embodiment of the utility model provides an atmosphere box furnace for electrolyte sintering, comprising:
[0005] A furnace body, wherein a combustion chamber is provided in the furnace body, an opening communicating with the combustion chamber is provided on the furnace body, and a movable door is provided at the opening; and,
[0006] A heating element is arranged in the combustion chamber, comprising a sleeve and a heating rod arranged in the sleeve, an air inlet is arranged at one end of the sleeve, an air vent is also arranged on the sleeve, the air inlet is communicated with the air vent, the air inlet is connected to a protective gas source, and the air vent is communicated with the combustion chamber.
[0007] According to an atmosphere box furnace for electrolyte sintering provided by the utility model, the sleeve comprises a quartz sleeve or an alumina ceramic sleeve.
[0008] According to an atmosphere box furnace for electrolyte sintering provided by the utility model, two inner walls opposite to each other in the depth direction of the combustion chamber are provided with a plurality of the heating elements, and each of the heating elements extends in the vertical direction.
[0009] According to the atmosphere box furnace for electrolyte sintering provided by the utility model, a plurality of the heating elements are provided on the inner wall of the combustion chamber which is arranged opposite to the opening, and each of the heating elements extends in the horizontal direction.
[0010] According to the atmosphere box furnace for electrolyte sintering provided by the utility model, a mounting hole is provided on the inner wall of the combustion chamber which is arranged opposite to the opening, and an exhaust pipe is provided at the air outlet.
[0011] According to an atmosphere box furnace for electrolyte sintering provided by the utility model, the exhaust pipe has a first section arranged in the combustion chamber and a second section arranged outside the combustion chamber, the first section is provided with a plurality of exhaust holes, the end of the second section is provided with an exhaust port, and the exhaust port is connected to the exhaust hole.
[0012] According to the atmosphere box furnace for electrolyte sintering provided by the utility model, the length of the first section is 1 / 3-1 / 2 of the depth of the combustion chamber.
[0013] According to the atmosphere box furnace for electrolyte sintering provided by the utility model, a one-way valve is provided at the exhaust port.
[0014] According to the atmosphere box furnace for electrolyte sintering provided by the utility model, the exhaust pipe includes a quartz exhaust pipe or an alumina ceramic exhaust pipe.
[0015] According to the atmosphere box furnace for electrolyte sintering provided by the utility model, the inner wall of the combustion chamber is provided with an alumina ceramic coating.
[0016] The atmosphere box furnace for electrolyte sintering provided by the utility model can prevent the corrosion of the heating rod by sealing the heating rod in the sleeve, and can also be used as an air inlet pipe on the one hand. The protective gas will be heated by the heating rod when entering the combustion chamber through the sleeve, which can effectively prevent the cold air introduced from disturbing the temperature field in the furnace. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
[0018] Figure 1 It is a structural schematic diagram of an atmosphere box furnace for electrolyte sintering provided by the utility model.
[0019] Figure numerals: 1, furnace body; 11, combustion chamber; 12, movable door; 13, exhaust pipe; 131, first section; 132, second section; 133, exhaust port; 134, one-way valve; 2, heating element; 21, sleeve; 22, heating rod. DETAILED DESCRIPTION
[0020] The following is a further detailed description of the implementation methods of the utility model in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the utility model, but cannot be used to limit the scope of the utility model. In the description of the embodiments of the utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the embodiments of the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the utility model. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.
[0021] In the description of the embodiments of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific circumstances.
[0022] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.
[0023] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model embodiment. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.
[0024] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described clearly and completely in conjunction with the drawings in the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0025] Combine the following Figure 1 The utility model describes an atmosphere box furnace for electrolyte sintering.
[0026] In view of the problem in the conventional technology that the furnace body and the heating part of the box-type furnace are prone to corrosion when sintering electrolyte, an embodiment of the utility model provides an atmosphere box-type furnace for electrolyte sintering, comprising a furnace body 1 and a heating element 2.
[0027] A combustion chamber 11 is provided in the furnace body 1, and an opening communicating with the combustion chamber 11 is provided on the furnace body 1, and a movable door 12 is provided at the opening, and the movable door 12 can be opened to place the electrolyte into the furnace body 1 through the opening, and the movable door 12 is closed when the electrolyte is sintered. The heating element 2 is provided in the combustion chamber 11, and includes a sleeve 21 and a heating rod 22 provided in the sleeve 21. An air inlet is provided at one end of the sleeve 21, and an air vent is also provided on the sleeve 21. The air inlet is communicated with the air vent, and the air inlet is connected to a protective gas source, and the air vent is communicated with the combustion chamber 11. The protective gas can enter the sleeve 21 through the air inlet, and then enter the combustion chamber 11 through the air vent of the sleeve 21, and the air vent is a micron-level air vent.
[0028] It should be noted that in the conventional technology, the heating rod is directly in contact with the gas generated by the electrolyte sintering, which easily causes corrosion of the heating rod and reduces the service life. The atmosphere box furnace for electrolyte sintering provided by the utility model can prevent the corrosion of the heating rod 22 by sealing the heating rod 22 in the sleeve 21, and can also be used as an air intake pipe. The protective gas will be heated by the heating rod 22 when entering the combustion chamber 11 through the sleeve 21, which can effectively prevent the cold air from disturbing the temperature field in the furnace, thereby improving the sintering effect of the electrolyte.
[0029] Specifically, the sleeve 21 includes a quartz sleeve 21 or an alumina ceramic sleeve 21. Alumina ceramic can withstand extremely high temperatures, usually up to 1800°C, and is suitable for applications involving high temperatures or rapid temperature changes. Quartz has high thermal stability and can be used for a long time at about 800°C, or even for a short time at a high temperature of 1450°C. By setting the sleeve 21 as a quartz sleeve 21 or an alumina ceramic sleeve 21, the service life of the sleeve 21 can be increased, and the heating rod 22 can be better protected.
[0030] In order to ensure the uniformity of heating and improve the sintering effect. In the technical solution provided by the utility model, the two inner walls opposite to each other in the depth direction of the combustion chamber 11 are provided with a plurality of heating elements 2, and each heating element 2 extends in the vertical direction. Multiple heating elements 2 can improve the heating efficiency. Furthermore, the inner wall of the combustion chamber 11 opposite to the opening is provided with a plurality of heating elements 2, and each heating element 2 extends in the horizontal direction. Through the uniform distribution of the heating elements 2, the uniformity and stability of the temperature field can be improved. It should be noted that the heating elements 2 can be distributed in the vertical direction or the horizontal direction, as long as the number and position of the settings are relatively uniform. It should be noted that the heating element 2 is not provided at the movable door 12. If the heating element 2 is provided here, it may affect the opening and closing of the movable door 12. Therefore, it is preferably not provided with the heating element 2 at the movable door 12.
[0031] Furthermore, when the electrolyte is sintered, waste gas will be generated. In the technical solution provided by the utility model, a mounting hole is provided on the inner wall of the combustion chamber 11 opposite to the opening, and an exhaust pipe 13 is provided at the mounting hole, and the waste gas can be discharged from the exhaust pipe 13. The exhaust pipe 13 has multiple embodiments. In an optional embodiment, both ends of the exhaust pipe 13 have exhaust ports 133, one end is located in the combustion chamber 11, and the other end is located outside the combustion chamber 11. The waste gas enters the exhaust pipe 13 through one exhaust port 133, and the other exhaust port 133 is discharged from the exhaust pipe 13. Although the exhaust speed in the above embodiment is relatively fast, it may affect the temperature field in the combustion chamber 11. In another optional embodiment, in order to ensure that the waste gas is discharged slowly and does not affect the temperature field, the exhaust pipe 13 has a first section 131 arranged in the combustion chamber 11 and a second section 132 arranged outside the combustion chamber 11, and the first section 131 is provided with a plurality of exhaust holes, and the end of the second section 132 is provided with an exhaust port 133, and the exhaust port 133 is connected to the exhaust hole. It should be noted that the exhaust hole is a millimeter-level exhaust hole, that is, one end of the exhaust pipe 13 is sealed, the end face and side wall of the first section 131 are provided with exhaust holes, and the end face of the second section 132 is provided with an exhaust port 133, which is connected to the exhaust hole for exhausting exhaust gas. Further, in order to ensure exhaust efficiency, the exhaust pipe 13 is arranged at the center of the side wall of the furnace body 1, and the length of the first section 131 is 1 / 3-1 / 2 of the depth of the combustion chamber 11.
[0032] Furthermore, in order to prevent air from flowing back into the combustion chamber 11 through the exhaust port 133, in an optional embodiment, a one-way valve 134 is provided at the exhaust port 133. Since the first section 131 of the exhaust pipe 13 is provided in the combustion chamber 11 and will be heated, in order to ensure the service life of the exhaust pipe 13, the exhaust pipe 13 includes a quartz exhaust pipe 13 or an alumina ceramic exhaust pipe 13.
[0033] It should also be noted that the inner wall of the combustion chamber 11 is provided with an alumina ceramic coating. By spraying alumina ceramic on the inner wall of the furnace body 1, the corrosion problem of the furnace body 1 during the sintering process can be effectively solved.
[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.
Claims
1. An atmosphere box furnace for electrolyte sintering, characterized in that: include: A furnace body, wherein a combustion chamber is provided in the furnace body, an opening communicating with the combustion chamber is provided on the furnace body, and a movable door is provided at the opening; as well as, A heating element is arranged in the combustion chamber, comprising a sleeve and a heating rod arranged in the sleeve, an air inlet is arranged at one end of the sleeve, an air vent is also arranged on the sleeve, the air inlet is communicated with the air vent, the air inlet is connected to a protective gas source, and the air vent is communicated with the combustion chamber.
2. The electrolyte sintering atmosphere box furnace according to claim 1, characterized in that: The sleeve includes a quartz sleeve or an alumina ceramic sleeve.
3. The electrolyte sintering atmosphere box furnace according to claim 1, characterized in that: Two inner walls opposite to each other in the depth direction of the combustion chamber are each provided with a plurality of the heating elements, and each of the heating elements extends in the vertical direction.
4. The electrolyte sintering atmosphere box furnace according to claim 3, characterized in that: The inner wall of the combustion chamber opposite to the opening is provided with a plurality of the heating elements, and each of the heating elements extends in a horizontal direction.
5. The electrolyte sintering atmosphere box furnace according to claim 1, characterized in that: A mounting hole is arranged on the inner wall of the combustion chamber which is arranged opposite to the opening, and an exhaust pipe is arranged at the mounting hole.
6. The electrolyte sintering atmosphere box furnace according to claim 5, characterized in that: The exhaust pipe comprises a first section disposed in the combustion chamber and a second section disposed outside the combustion chamber, the first section is provided with a plurality of exhaust holes, an exhaust port is provided at an end of the second section, and the exhaust port is communicated with the exhaust holes.
7. The electrolyte sintering atmosphere box furnace according to claim 6, characterized in that: The length of the first section is 1 / 3-1 / 2 of the depth of the combustion chamber.
8. The electrolyte sintering atmosphere box furnace according to claim 6, characterized in that: A one-way valve is arranged at the exhaust port.
9. The electrolyte sintering atmosphere box furnace according to claim 5, characterized in that: The exhaust pipe includes a quartz exhaust pipe or an alumina ceramic exhaust pipe.
10. The electrolyte sintering atmosphere box furnace according to claim 1, characterized in that: The inner walls of the combustion chamber are all provided with an alumina ceramic coating.