Alumina ceramic diaphragm for sodium-sulfur battery, preparation method and device

Abstract

The invention relates to the technical field of ceramics, in particular to an aluminum oxide ceramic diaphragm for a sodium-sulfur battery and a preparation method and device.The preparation device of the aluminum oxide ceramic diaphragm for the sodium-sulfur battery comprises a base and a preparation assembly, and the preparation assembly comprises a supporting base, an outer cylinder, a ball milling cylinder, a plurality of grinding balls, a connecting pipe and a rotating component; aluminum oxide powder needed for preparing the aluminum oxide ceramic diaphragm is guided into the ball-milling cylinder through the connecting pipe, the connecting rod and the ball-milling cylinder are driven to rotate through the rotating component, the ball-milling cylinder drives the multiple grinding balls to rotate, and the grinding balls are used for grinding the aluminum oxide powder in the ball-milling cylinder; the aluminum oxide powder meeting the fineness requirement can penetrate through filter holes in the ball milling barrel to flow to the outer barrel; the aluminum oxide powder meeting the fineness requirement can be discharged out of the ball-milling barrel in real time when the aluminum oxide powder is subjected to ball milling, so that the overall weight of the ball-milling barrel and materials in the ball-milling barrel can be reduced, and the energy consumption required for grinding the aluminum oxide powder is further reduced.

Description

Technical Field

[0001] The present invention relates to the field of ceramic technology, and in particular to an alumina ceramic diaphragm for a sodium-sulfur battery, and a preparation method and device thereof. Background Art

[0002] β-alumina ceramic tube is a solid electrolyte in sodium-sulfur battery. It has a specific crystal structure (β" type) and is used to separate the anode (sodium) and cathode (sulfur) of the battery. As the electrolyte and diaphragm of sodium-sulfur battery, it has the characteristic of only allowing sodium ions to pass through, thereby ensuring the ion conduction and electronic insulation inside the battery. In the battery reaction process, β-alumina ceramic tube acts as an electrolyte for conducting sodium ions. When preparing alumina ceramic diaphragm, it needs to be ball milled, formed and sintered before it can be obtained. Among them, a ball mill is required when ball milling the alumina ceramic diaphragm.

[0003] The existing ball mill for preparing alumina ceramic diaphragm mainly includes a power device and a ball mill. The ball mill is filled with grinding media, which is driven to rotate by the power device. Under the action of centrifugal force and friction, the grinding media in the ball mill rotates with the ball mill to a certain height and then falls down to impact and grind the alumina powder.

[0004] However, when the above method is adopted, the existing ball mill is used by introducing the raw materials into the ball mill, and then stopping and pouring out after all the alumina powders meet the fineness requirements. In this process, some alumina powders have already met the fineness requirements, but since there are still alumina powders that have not met the fineness requirements, these alumina powders that have met the fineness requirements have to participate in the rotation, thereby increasing energy consumption. Summary of the invention

[0005] The object of the present invention is to provide an alumina ceramic diaphragm for sodium-sulfur batteries, a preparation method and a device, which can reduce the energy consumption required for grinding alumina powder when preparing the alumina ceramic diaphragm.

[0006] To achieve the above-mentioned object, in a first aspect, the present invention provides an alumina ceramic diaphragm preparation device for a sodium-sulfur battery, comprising a base and a preparation component, wherein the preparation component comprises a support seat, an outer cylinder, a ball mill, a plurality of grinding balls, a connecting pipe and a rotating component;

[0007] The support seat is fixedly connected to the base and is located on the top of the base; the outer cylinder is fixedly connected to the support seat and is located on the top of the support seat, the outer cylinder has two discharge ports, and the two discharge ports are located on both sides of the outer cylinder; the ball mill is rotatably connected to the outer cylinder and is located inside the outer cylinder, the ball mill has a plurality of filter holes, and the plurality of filter holes are evenly distributed on the side of the ball mill; the plurality of grinding balls are respectively located inside the ball mill; the connecting pipe is fixedly connected to the ball mill, rotatably connected to the outer cylinder, and passes through the outer cylinder; the rotating component is arranged on the side of the connecting pipe.

[0008] Wherein, the preparation component further includes a translation component and a push ring; the translation component is arranged inside the outer cylinder, and the push ring is arranged on the side of the translation component.

[0009] Wherein, the preparation component also includes a sealing cover; the sealing cover is threadedly connected to the connecting pipe and is located on the side of the connecting pipe.

[0010] Among them, the translation component includes a screw, a connecting block and a guide rod; the screw is rotatably connected to the outer cylinder and passes through the outer cylinder; the connecting block is threadedly connected to the screw, fixedly connected to the push ring, and located on the side of the screw; the guide rod is fixedly connected to the outer cylinder, slidably connected to the connecting block, and located inside the outer cylinder.

[0011] Among them, the rotating component includes a connecting shaft, a motor, a driving gear and a driven gear; the connecting shaft is rotatably connected to the support seat and is located on the side of the support seat; the motor is fixedly connected to the base, and the motor output end is fixedly connected to the connecting shaft and is located on the top of the base; the driving gear is fixedly connected to the connecting shaft and is located on the side of the connecting shaft; the driven gear is fixedly connected to the connecting pipe and meshes with the driving gear.

[0012] In a second aspect, the present invention also provides a method for preparing an alumina ceramic diaphragm for a sodium-sulfur battery, comprising:

[0013] Add alumina powder into the ball mill through the connecting pipe, turn on the rotating part to drive the ball mill to rotate, and grind the alumina powder to the required size;

[0014] The ground alumina powder is isostatically pressed into a ceramic tube shape;

[0015] Trim the formed ceramic tube to remove excess material and improve its surface quality;

[0016] Pre-sinter the ceramic tube to remove moisture and organic matter from the ceramic tube;

[0017] The pre-fired ceramic tube is placed in a high-temperature furnace for sintering, and after sintering, an alumina ceramic diaphragm for a sodium-sulfur battery is obtained.

[0018] In a third aspect, the present invention further provides an alumina ceramic diaphragm for a sodium-sulfur battery, which is prepared by the method for preparing the alumina ceramic diaphragm for a sodium-sulfur battery.

[0019] The present invention discloses an alumina ceramic diaphragm for sodium-sulfur batteries, a preparation method and a device. When in use, the alumina powder required for preparing the alumina ceramic diaphragm is introduced into the ball mill through the connecting pipe, the connecting rod and the ball mill are driven to rotate by the rotating component, the ball mill drives the plurality of grinding balls to rotate, and the grinding balls are used to grind the alumina powder in the ball mill. The alumina powder that meets the fineness requirement will pass through the filter holes on the ball mill and flow to the outer cylinder, and the alumina powder in the outer cylinder can be discharged through the discharge port. The present invention can discharge the alumina powder that meets the fineness requirement from the ball mill in real time when ball milling the alumina powder, thereby reducing the overall weight of the ball mill and its internal materials, thereby reducing the energy consumption required for grinding the alumina powder. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.

[0021] Figure 1 It is a schematic diagram of the overall structure of a first embodiment of a device for preparing an alumina ceramic diaphragm for a sodium-sulfur battery according to the present invention.

[0022] Figure 2 It is an overall front cross-sectional view of a first embodiment of a device for preparing an alumina ceramic diaphragm for a sodium-sulfur battery according to the present invention.

[0023] Figure 3 It is an overall side cross-sectional view of a first embodiment of a device for preparing an alumina ceramic diaphragm for a sodium-sulfur battery according to the present invention.

[0024] Figure 4 It is a schematic diagram of the overall structure of a second embodiment of a device for preparing an alumina ceramic diaphragm for a sodium-sulfur battery according to the present invention.

[0025] Figure 5 It is an overall front cross-sectional view of a second embodiment of a device for preparing an alumina ceramic diaphragm for a sodium-sulfur battery according to the present invention.

[0026] Figure 6 It is a structural schematic diagram of a second embodiment of an alumina ceramic diaphragm preparation device for a sodium-sulfur battery of the present invention, excluding a driving gear.

[0027] Figure 7 The present invention is a flow chart of a method for preparing an alumina ceramic diaphragm for a sodium-sulfur battery.

[0028] Figure 8 It is a schematic structural diagram of an alumina ceramic diaphragm for a sodium-sulfur battery of the present invention.

[0029] 101-base, 102-support seat, 103-outer cylinder, 104-ball mill, 105-milling balls, 106-connecting pipe, 107-rotating component, 108-discharging port, 109-filter hole, 110-translational component, 111-pushing ring, 112-sealing cover, 113-screw, 114-connecting block, 115-guide rod, 116-connecting shaft, 117-motor, 118-driving gear, 119-driven gear, 201-transmission assembly, 202-driving wheel, 203-driven wheel, 204-transmission belt, 205-PLC controller. DETAILED DESCRIPTION

[0030] Embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, but should not be construed as limiting the present invention.

[0031] In a first aspect, the present invention provides an alumina ceramic diaphragm preparation device for a sodium-sulfur battery. A first embodiment of an alumina ceramic diaphragm preparation device for a sodium-sulfur battery of the present application is:

[0032] See also Figure 1-Figure 3 ,in, Figure 1 1 is a schematic diagram of the overall structure of a first embodiment of an alumina ceramic diaphragm preparation device for a sodium-sulfur battery according to the present invention. Figure 2 is a front cross-sectional view of the whole of a first embodiment of a device for preparing an alumina ceramic diaphragm for a sodium-sulfur battery according to the present invention, Figure 3 It is an overall side cross-sectional view of a first embodiment of a device for preparing an alumina ceramic diaphragm for a sodium-sulfur battery according to the present invention.

[0033] The present invention provides an alumina ceramic diaphragm preparation device for a sodium-sulfur battery, comprising a base 101 and a preparation component, wherein the preparation component comprises a support seat 102, an outer cylinder 103, a ball mill 104, a plurality of grinding balls 105, a connecting pipe 106, a rotating component 107, a translation component 110, a push ring 111 and a sealing cover 112; the translation component 110 comprises a screw 113, a connecting block 114 and a guide rod 115; the rotating component 107 comprises a connecting shaft 116, a motor 117, a driving gear 118 and a driven gear 119; the above-mentioned scheme can reduce the energy consumption required for grinding alumina powder when preparing the alumina ceramic diaphragm.

[0034] According to this specific embodiment, the support seat 102 is fixedly connected to the base 101 and is located at the top of the base 101; the outer cylinder 103 is fixedly connected to the support seat 102 and is located at the top of the support seat 102, the outer cylinder 103 has two discharge ports 108, and the two discharge ports 108 are located on both sides of the outer cylinder 103; the ball mill 104 is rotatably connected to the outer cylinder 103 and is located inside the outer cylinder 103, the ball mill 104 has a plurality of filter holes 109, and the plurality of filter holes 109 are evenly distributed on the side of the ball mill 104; the plurality of grinding balls 105 are respectively located inside the ball mill 104; the connecting pipe 106 is fixedly connected to the ball mill 104, and is rotatably connected to the outer cylinder 103 and passes through the outer cylinder 103; the rotating component 107 is arranged on the side of the connecting pipe 106. The base 101 and the support seat 102 are used to support the outer cylinder 103. When in use, the alumina powder required for preparing the alumina ceramic diaphragm is introduced into the ball mill 104 through the connecting pipe 106, and the connecting rod and the ball mill 104 are driven to rotate by the rotating component 107. The ball mill 104 drives the multiple grinding balls 105 to rotate, and the grinding balls 105 are used to grind the alumina powder in the ball mill 104. The alumina powder that meets the fineness requirement will pass through the filter holes 109 on the ball mill 104 and flow to the outer cylinder 103, and the alumina powder in the outer cylinder 103 can be discharged through the discharge port 108. The present invention can discharge the alumina powder that meets the fineness requirement from the ball mill 104 in real time when ball milling the alumina powder, thereby reducing the overall weight of the ball mill 104 and the material inside it, thereby reducing the energy consumption required for grinding the alumina powder.

[0035] The translation component 110 is disposed inside the outer cylinder 103, and the push ring 111 is disposed on the side of the translation component 110. The translation component 110 can drive the push ring 111 to move horizontally along the inner wall of the outer cylinder 103, and the push ring 111 can push the aluminum oxide powder in the outer cylinder 103 to the discharge port 108 for discharge.

[0036] Secondly, the sealing cover 112 is threadedly connected to the connecting pipe 106 and is located at the side of the connecting pipe 106. The sealing cover 112 can seal the connecting pipe 106 to prevent foreign matter from entering the ball mill 104 through the connecting pipe 106.

[0037] At the same time, the screw 113 is rotatably connected to the outer cylinder 103 and penetrates the outer cylinder 103; the connection block 114 is threadedly connected to the screw 113, fixedly connected to the push ring 111, and located at the side of the screw 113; the guide rod 115 is fixedly connected to the outer cylinder 103, slidably connected to the connection block 114, and located inside the outer cylinder 103. By rotating the screw 113, the screw 113 rotates so that the connection block 114 moves horizontally along the guide rod 115, and the connection block 114 drives the push ring 111 to move horizontally along the inner wall of the outer cylinder 103, and the push ring 111 can be used to push the aluminum oxide powder in the outer cylinder 103 to the discharge port 108 for discharge.

[0038] In addition, the connecting shaft 116 is rotatably connected to the support base 102 and is located at the side of the support base 102; the motor 117 is fixedly connected to the base 101, and the output end of the motor 117 is fixedly connected to the connecting shaft 116 and is located at the top of the base 101; the driving gear 118 is fixedly connected to the connecting shaft 116 and is located at the side of the connecting shaft 116; the driven gear 119 is fixedly connected to the connecting tube 106 and meshes with the driving gear 118. When the motor 117 is turned on, the driving gear 118 and the connecting shaft 116 are driven to rotate, and the driving gear 118 drives the driven gear 119 to rotate, and the driven gear 119 drives the connecting tube 106 to rotate.

[0039] When using the present invention, the alumina powder required for preparing the alumina ceramic diaphragm is introduced into the ball mill 104 through the connecting tube 106, the motor 117 is turned on to drive the driving gear 118 and the connecting shaft 116 to rotate, the driving gear 118 drives the driven gear 119 to rotate, the driven gear 119 drives the connecting tube 106 and the ball mill 104 to rotate, the ball mill 104 drives the plurality of grinding balls 105 to rotate, and the grinding balls 105 are used to grind the alumina powder in the ball mill 104, and the alumina powder that meets the fineness requirement will pass through the filter holes 109 on the ball mill 104. Flow to the outer cylinder 103, by rotating the screw 113, the screw 113 rotates to make the connecting block 114 move horizontally along the guide rod 115, the connecting block 114 drives the push ring 111 to move horizontally along the inner wall of the outer cylinder 103, and the push ring 111 can be used to push the alumina powder in the outer cylinder 103 to the discharge port 108 for discharge; the present invention can discharge the alumina powder that meets the fineness requirement from the ball mill 104 in real time when ball milling the alumina powder, thereby reducing the weight of the ball mill 104 and its internal materials as a whole, thereby reducing the energy consumption required for grinding the alumina powder. The ground alumina powder is formed into a ceramic tube shape by isostatic pressing, the formed ceramic tube is trimmed to remove excess materials and improve its surface quality, the trimmed ceramic tube is pre-sintered to remove moisture and organic matter in the ceramic tube, and finally the pre-sintered ceramic tube is placed in a high-temperature furnace for sintering, and the alumina ceramic diaphragm for sodium-sulfur batteries is obtained after sintering.

[0040] A second embodiment of an alumina ceramic diaphragm preparation device for a sodium-sulfur battery of the present application is:

[0041] Based on the first embodiment, please refer to Figure 4-Figure 6 ,in, Figure 4 1 is a schematic diagram of the overall structure of a second embodiment of an alumina ceramic diaphragm preparation device for a sodium-sulfur battery according to the present invention. Figure 5 is a front cross-sectional view of the whole of a second embodiment of an alumina ceramic diaphragm preparation device for a sodium-sulfur battery according to the present invention, Figure 6 It is a structural schematic diagram of a second embodiment of an alumina ceramic diaphragm preparation device for a sodium-sulfur battery of the present invention, excluding a driving gear.

[0042] The device for preparing an alumina ceramic diaphragm for a sodium-sulfur battery provided by the present invention further includes a transmission component 201; the transmission component 201 includes a driving wheel 202, a driven wheel 203, a transmission belt 204 and a PLC controller 205.

[0043] According to this specific embodiment, the transmission assembly 201 is disposed between the connecting tube 106 and the screw 113. When the connecting tube 106 rotates, the screw 113 can be driven to rotate simultaneously through the transmission assembly 201, so that the alumina powder in the outer cylinder 103 can be discharged through the discharge port 108 while the alumina powder is ball-milled.

[0044] Among them, the driving wheel 202 is fixedly connected to the connecting tube 106 and is located on the side of the connecting tube 106; the driven wheel 203 is fixedly connected to the screw 113 and is located on the side of the screw 113; the transmission belt 204 is sleeved between the driving wheel 202 and the driven wheel 203; the PLC controller 205 is fixedly connected to the outer cylinder 103, is electrically connected to the motor 117, and is located on the side of the outer cylinder 103. The motor 117 is turned on to drive the driving gear 118 and the connecting shaft 116 to rotate, the driving gear 118 drives the driven gear 119 to rotate, the driven gear 119 drives the connecting tube 106, the ball mill 104 and the driving wheel 202 to rotate, the driving wheel 202 drives the driven wheel 203 to rotate via the transmission belt 204, the driven wheel 203 drives the screw 113 to rotate, the screw 113 rotates so that the push ring 111 moves horizontally along the inner wall of the outer cylinder 103, thereby The alumina powder in the cylinder 103 is pushed out from the discharge port 108. Since the length of the outer cylinder 103 is limited, the long-term rotation of the screw 113 in the same direction will cause the push ring 111 to finally press against one side of the outer cylinder 103. Therefore, the PLC controller 205 is used to control the motor 117 to rotate forward and reverse periodically according to time, thereby driving the screw 113 to rotate forward and reverse periodically, so that the push ring 111 can move horizontally back and forth. The parameters of the forward and reverse rotation time of the motor 117 are set according to actual conditions.

[0045] When the present invention is used, the alumina powder required for preparing the alumina ceramic diaphragm is introduced into the ball mill 104 through the connecting tube 106, the motor 117 is turned on to drive the driving gear 118 and the connecting shaft 116 to rotate, the driving gear 118 drives the driven gear 119 to rotate, the driven gear 119 drives the connecting tube 106, the ball mill 104 and the driving wheel 202 to rotate, the ball mill 104 drives the plurality of grinding balls 105 to rotate, and the grinding balls 105 are used to grind the alumina powder in the ball mill 104, and the alumina powder that meets the fineness requirement will pass through the filter hole 109 on the ball mill 104 and flow to the outer cylinder 103; the driving wheel 202 drives the plurality of grinding balls 105 through the transmission belt 204. The driven wheel 203 rotates, and the driven wheel 203 drives the screw 113 to rotate. The rotation of the screw 113 causes the push ring 111 to move horizontally along the inner wall of the outer cylinder 103, thereby pushing the alumina powder in the outer cylinder 103 out of the discharge port 108. Since the length of the outer cylinder 103 is limited, the long-term rotation of the screw 113 in the same direction will cause the push ring 111 to eventually press against one side of the outer cylinder 103. Therefore, the PLC controller 205 is used to control the motor 117 to rotate forward and reverse periodically according to time, thereby driving the screw 113 to rotate forward and reverse periodically, so that the push ring 111 can move horizontally back and forth. The parameters of the forward and reverse time of the motor 117 are set according to actual conditions.

[0046] Second, see Figure 7 , Figure 7 The present invention is a flow chart of a method for preparing an alumina ceramic diaphragm for a sodium-sulfur battery.

[0047] The present invention also provides a method for preparing an alumina ceramic diaphragm for a sodium-sulfur battery, comprising:

[0048] S1: Add aluminum oxide powder into the ball mill 104 through the connecting pipe 106, turn on the rotating part 107 to drive the ball mill 104 to rotate, and grind the aluminum oxide powder to a desired size;

[0049] S2 isostatically pressing the ground alumina powder into a ceramic tube shape;

[0050] S3 trims the formed ceramic tube to remove excess material and improve its surface quality;

[0051] S4 performs pre-sintering treatment on the ceramic tube to remove moisture and organic matter in the ceramic tube;

[0052] S5: placing the pre-fired ceramic tube in a high temperature furnace for sintering, and after sintering, an alumina ceramic diaphragm for a sodium-sulfur battery is obtained;

[0053] The present invention provides a method for preparing an alumina ceramic diaphragm for a sodium-sulfur battery. The alumina powder required for preparing the alumina ceramic diaphragm is introduced into the ball mill 104 through the connecting tube 106, the motor 117 is turned on to drive the driving gear 118 and the connecting shaft 116 to rotate, the driving gear 118 drives the driven gear 119 to rotate, the driven gear 119 drives the connecting tube 106, the ball mill 104 and the driving wheel 202 to rotate, the ball mill 104 drives the plurality of grinding balls 105 to rotate, the grinding balls 105 are used to grind the alumina powder in the ball mill 104, and the alumina powder that meets the fineness requirement will pass through the filter hole 109 on the ball mill 104 and flow to the outer cylinder 103; the driving wheel 202 is driven by the filter hole 109 on the ball mill 104 to ... The transmission belt 204 drives the driven wheel 203 to rotate, and the driven wheel 203 drives the screw 113 to rotate. The rotation of the screw 113 causes the push ring 111 to move horizontally along the inner wall of the outer cylinder 103, thereby pushing the alumina powder in the outer cylinder 103 out of the discharge port 108. Since the length of the outer cylinder 103 is limited, the long-term rotation of the screw 113 in the same direction will cause the push ring 111 to eventually press against one side of the outer cylinder 103. Therefore, the PLC controller 205 is used to control the motor 117 to rotate forward and reverse periodically according to time, thereby driving the screw 113 to rotate forward and reverse periodically, so that the push ring 111 can move back and forth horizontally. The parameters of the forward and reverse rotation time of the motor 117 are set according to actual conditions. The ground alumina powder is formed into a ceramic tube shape by isostatic pressing, the formed ceramic tube is trimmed to remove excess material and improve its surface quality, the trimmed ceramic tube is pre-fired to remove moisture and organic matter in the ceramic tube, and finally the pre-fired ceramic tube is placed in a high-temperature furnace for sintering. After sintering, an alumina ceramic diaphragm for sodium-sulfur batteries is obtained.

[0054] Third, see Figure 8 , Figure 8 The present invention also provides an alumina ceramic diaphragm for a sodium-sulfur battery, which is prepared by the alumina ceramic diaphragm preparation method for a sodium-sulfur battery.

[0055] The invention discloses an alumina ceramic diaphragm for a sodium-sulfur battery. The alumina powder is added into a ball mill 104 through a connecting pipe 106, a rotating part 107 is turned on to drive the ball mill 104 to rotate, the alumina powder is ground to a required size, the ground alumina powder is formed into a ceramic tube shape by isostatic pressing, the formed ceramic tube is trimmed to remove excess materials and improve its surface quality, the trimmed ceramic tube is pre-sintered to remove moisture and organic matter in the ceramic tube, and finally the pre-sintered ceramic tube is placed in a high-temperature furnace for sintering. After sintering, the alumina ceramic diaphragm for a sodium-sulfur battery is obtained. The alumina ceramic diaphragm obtained by the invention has good chemical stability at high temperature, high mechanical strength and high ionic conductivity.

[0056] What is disclosed above is only one or more preferred embodiments of the present application, and cannot be used to limit the scope of rights of the present application. Ordinary technicians in this field can understand that all or part of the processes of implementing the above embodiments and equivalent changes made according to the claims of the present application are still within the scope covered by the present application.

Claims

1. A device for preparing an alumina ceramic diaphragm for a sodium-sulfur battery, comprising a base, characterized in that: Also included are preparation components; The preparation assembly includes a support seat, an outer cylinder, a ball mill, a plurality of grinding balls, a connecting pipe and a rotating component; The support seat is fixedly connected to the base and is located on the top of the base; the outer cylinder is fixedly connected to the support seat and is located on the top of the support seat, the outer cylinder has two discharge ports, and the two discharge ports are located on both sides of the outer cylinder; the ball mill is rotatably connected to the outer cylinder and is located inside the outer cylinder, the ball mill has a plurality of filter holes, and the plurality of filter holes are evenly distributed on the side of the ball mill; the plurality of grinding balls are respectively located inside the ball mill; the connecting pipe is fixedly connected to the ball mill, rotatably connected to the outer cylinder, and passes through the outer cylinder; the rotating component is arranged on the side of the connecting pipe.

2. The device for preparing an alumina ceramic diaphragm for a sodium-sulfur battery according to claim 1, characterized in that: The preparation assembly further comprises a translation component and a push ring; the translation component is arranged inside the outer cylinder, and the push ring is arranged on the side of the translation component.

3. The device for preparing an alumina ceramic diaphragm for a sodium-sulfur battery according to claim 2, characterized in that: The preparation assembly also includes a sealing cover; the sealing cover is threadedly connected to the connecting pipe and is located on the side of the connecting pipe.

4. The device for preparing an alumina ceramic diaphragm for a sodium-sulfur battery according to claim 3, characterized in that: The translation component includes a screw rod, a connecting block and a guide rod; the screw rod is rotatably connected to the outer cylinder and passes through the outer cylinder; the connecting block is threadedly connected to the screw rod, fixedly connected to the push ring, and located on the side of the screw rod; the guide rod is fixedly connected to the outer cylinder, slidably connected to the connecting block, and located inside the outer cylinder.

5. The device for preparing an alumina ceramic diaphragm for a sodium-sulfur battery according to claim 4, characterized in that: The rotating component includes a connecting shaft, a motor, a driving gear and a driven gear; the connecting shaft is rotatably connected to the support seat and is located at the side of the support seat; the motor is fixedly connected to the base, and the output end of the motor is fixedly connected to the connecting shaft and is located at the top of the base; The driving gear is fixedly connected to the connecting shaft and is located on the side of the connecting shaft; the driven gear is fixedly connected to the connecting pipe and meshes with the driving gear.

6. A method for preparing an alumina ceramic diaphragm for a sodium-sulfur battery, applied to an alumina ceramic diaphragm preparation device for a sodium-sulfur battery as claimed in any one of claims 1 to 5, characterized in that: include: Add alumina powder into the ball mill through the connecting pipe, turn on the rotating part to drive the ball mill to rotate, and grind the alumina powder to the required size; The ground alumina powder is isostatically pressed into a ceramic tube shape; Trim the formed ceramic tube to remove excess material and improve its surface quality; Pre-sinter the ceramic tube to remove moisture and organic matter from the ceramic tube; The pre-fired ceramic tube is placed in a high-temperature furnace for sintering, and after sintering, an alumina ceramic diaphragm for a sodium-sulfur battery is obtained.

7. An alumina ceramic diaphragm for sodium-sulfur battery, characterized in that: The method for preparing an alumina ceramic diaphragm for a sodium-sulfur battery as claimed in claim 6 is used for preparation.

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