Aluminum oxide ceramic diaphragm for sodium-sulfur battery, sintering 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 sintering method and device.The aluminum oxide ceramic diaphragm sintering device for the sodium-sulfur battery comprises a sintering furnace, a base, a hanging frame and a sintering assembly; the sintering assembly comprises a high-temperature-resistant sealing baffle, a plug connector, a locking frame, a locking piece and a plurality of placing structures, a prepared and formed aluminum oxide ceramic diaphragm blank is placed in the corresponding placing frame, and a corresponding operation accessory is operated to drive a telescopic cylinder to push a connecting plate; when the connecting plate moves, the guiding accessory provides limiting, so that the abutting block abuts against the aluminum oxide ceramic diaphragm blank to complete auxiliary fixing of the aluminum oxide ceramic diaphragm blank, and therefore the problems that according to an existing aluminum oxide ceramic diaphragm sintering device, the blank is not fixed after being placed on the base; and as the surface of the base is flat, the plain blank mold can move all around in the sintering process, and the sintering effect is affected.

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 sintering method and device. Background Art

[0002] Sodium-sulfur battery is a secondary battery with Na-β″-Al2O3 ceramic tube as electrolyte and diaphragm, metallic sodium as negative electrode material and non-metallic sulfur as positive electrode material. It has the advantages of high energy, high power discharge, high efficiency and long cycle life. Solid electrolyte β-alumina ceramic has good sodium ion conductivity. High-performance β-alumina ceramic tube is the core component of sodium-sulfur battery. The process of sintering solid electrolyte β-alumina into porcelain at high temperature is the key step in the preparation of sodium-sulfur battery.

[0003] The existing alumina ceramic diaphragm sintering device mainly includes a firing furnace and a base. The prepared green blank is placed on the base, and the temperature is raised by the firing furnace to fire the green blank, and the alumina ceramic diaphragm is sintered by high temperature.

[0004] However, in the above method, the green embryo is not fixed after being placed on the base. Since the surface of the base is flat, the green embryo mold may move around during the sintering process, affecting the sintering effect. Summary of the invention

[0005] The object of the present invention is to provide an alumina ceramic diaphragm, a sintering method and a device for a sodium-sulfur battery, aiming to solve the problem that in the existing alumina ceramic diaphragm sintering device, the green blank is placed on a base but is not fixed. Since the surface of the base is flat, the green blank mold may move around during the sintering process, affecting the sintering effect.

[0006] To achieve the above-mentioned object, in a first aspect, the present invention provides an alumina ceramic diaphragm sintering device for a sodium-sulfur battery, comprising a firing furnace, a base, a hanging bracket and a sintering assembly, wherein the base is located at the bottom of the firing furnace; the hanging bracket is fixedly connected to the firing furnace and is located on one side of the firing furnace.

[0007] The sintering assembly includes a high temperature resistant sealing baffle, a plug-in component, a locking frame, a locking component, and a plurality of placement structures;

[0008] The high temperature resistant sealing baffle is rotatably connected to the firing furnace and is located on one side of the firing furnace; the plug-in is arranged on one side of the high temperature resistant sealing baffle; the locking frame is fixedly connected to the firing furnace and is located on one side of the firing furnace; the locking member is arranged on one side of the locking frame; a plurality of the placement structures are respectively located on one side of the base; the placement structure comprises a placement frame and two fixing members, the placement frame is fixedly connected to the base and is located on one side of the base; the two fixing members are respectively arranged on both sides of the placement frame; the fixing members comprise a bracket, an operating accessory, a telescopic cylinder, a connecting plate, a guide accessory and a resistance block, the bracket is fixedly connected to the placement frame and is located on one side of the placement frame; the operating accessory is arranged on one side of the bracket; the telescopic cylinder is threadedly connected to the operating accessory and is located on one side of the operating accessory; the connecting plate is fixedly connected to the telescopic cylinder and is located on the same side of the telescope; the guide accessories are respectively arranged between the bracket and the connecting plate; the resistance block is fixedly connected to the connecting plate and is located on one side of the connecting plate.

[0009] Wherein, the connector includes a connecting part and a docking block, the connecting part is fixedly connected to the high temperature resistant sealing baffle and is located on one side of the high temperature resistant sealing baffle; the docking block is fixedly connected to the connecting part and is located on one side of the connecting part.

[0010] Wherein, the locking member includes a locking screw and a latch, the locking screw is threadedly connected to the locking frame and is located on one side of the locking frame; the latch is fixedly connected to the locking screw and is located on one side of the locking screw.

[0011] Wherein, the operating accessory includes an operating screw and a knob, the operating screw is rotatably connected to the bracket and is threadedly connected to the telescopic cylinder and is located on one side of the bracket; the knob is fixedly connected to the operating screw and is located on one side of the operating screw.

[0012] Wherein, the guide accessory includes a guide cylinder and a guide rod, the guide cylinder is fixedly connected to the bracket and is located on one side of the bracket; the guide rod is slidably connected to the guide cylinder and fixedly connected to the connecting plate and is located on one side of the guide cylinder.

[0013] In a second aspect, the present invention further provides a method for sintering an alumina ceramic diaphragm for a sodium-sulfur battery, comprising:

[0014] The U-shaped heating rods are evenly assembled through the hanging rack inside the firing furnace;

[0015] Placing the prepared alumina ceramic diaphragm blank in a corresponding placement frame;

[0016] Operate the corresponding operating accessories to drive the telescopic cylinder to push the connecting plate;

[0017] When the connecting plate moves, the guide attachment provides a limit so that the abutment block abuts against the alumina ceramic diaphragm blank;

[0018] Then close the high temperature resistant sealing baffle and buckle it with the firing furnace;

[0019] The plug-in connector is inserted into the locking frame and fixed by the locking member;

[0020] A U-shaped heating rod mounted on an external starting bracket heats and sintered the alumina ceramic diaphragm blank.

[0021] In a third aspect, the present invention further provides an alumina ceramic diaphragm for a sodium-sulfur battery, which is sintered using the alumina ceramic diaphragm sintering method for a sodium-sulfur battery.

[0022] The present invention discloses an alumina ceramic diaphragm sintering device for a sodium-sulfur battery. The U-shaped heating rod is evenly assembled on the hanging frame inside the firing furnace to place the prepared alumina ceramic diaphragm blank in the corresponding placement frame. The corresponding operating accessory is operated to drive the telescopic cylinder to push the connecting plate. When the connecting plate moves, the guide accessory provides a limit so that the abutment block abuts against the alumina ceramic diaphragm blank. Then, the high-temperature resistant sealing baffle is closed and engaged with the firing furnace. The connector is inserted into the locking frame and fixed by the locking member. The U-shaped heating rod assembled on the hanging frame is started externally to heat and sinter the alumina ceramic diaphragm blank, thereby solving the problem that the blank is not fixed after being placed on the base. Since the surface of the base is flat, the blank mold may move around during the sintering process, affecting the sintering effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] 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.

[0024] Figure 1 It is a schematic diagram of the overall structure of a first embodiment of an alumina ceramic diaphragm sintering device for a sodium-sulfur battery according to the present invention.

[0025] Figure 2 It is an overall front view of a first embodiment of an alumina ceramic diaphragm sintering device for a sodium-sulfur battery according to the present invention.

[0026] Figure 3 It is a cross-sectional view of a locking frame and a locking member of a first embodiment of an alumina ceramic diaphragm sintering device for a sodium-sulfur battery according to the present invention.

[0027] Figure 4It is an overall front view of a second embodiment of an alumina ceramic diaphragm sintering device for a sodium-sulfur battery according to the present invention.

[0028] Figure 5 It is a schematic diagram of the overall structure of a second embodiment of an alumina ceramic diaphragm sintering device for a sodium-sulfur battery according to the present invention.

[0029] Figure 6 The present invention is a flow chart of a method for sintering an alumina ceramic diaphragm for a sodium-sulfur battery.

[0030] Figure 7 It is a schematic structural diagram of an alumina ceramic diaphragm for a sodium-sulfur battery of the present invention.

[0031] 101-firing furnace, 102-base, 103-hanging frame, 104-high temperature resistant sealing baffle, 105-connector, 106-locking frame, 107-locking piece, 109-placing structure, 110-placing frame, 111-fixing piece, 112-bracket, 113-operating accessories, 114-telescopic cylinder, 115-connecting plate, 116-guide accessories, 117-resistance block, 118-connecting part, 119-docking block, 120-locking screw, 121-latch, 122-operating screw, 123-knob, 124-guide cylinder, 125-guide rod, 201-insulation component, 202-rock wool layer, 203-high temperature resistant lining, 204-insulation sand, 205-insulation cover. DETAILED DESCRIPTION

[0032] 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.

[0033] In a first aspect, the present invention provides an alumina ceramic diaphragm sintering device for a sodium-sulfur battery. A first embodiment of an alumina ceramic diaphragm sintering device for a sodium-sulfur battery of the present application is:

[0034] 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 sintering device for a sodium-sulfur battery according to the present invention. Figure 2 is an overall front view of a first embodiment of an alumina ceramic diaphragm sintering device for a sodium-sulfur battery according to the present invention, Figure 3 It is a cross-sectional view of a locking frame and a locking member of a first embodiment of an alumina ceramic diaphragm sintering device for a sodium-sulfur battery according to the present invention.

[0035] The present invention provides an alumina ceramic diaphragm sintering device for a sodium-sulfur battery, comprising a sintering furnace 101, a base 102, a hanging frame 103 and a sintering assembly, wherein the sintering assembly comprises a high temperature resistant sealing baffle 104, a plug-in component 105, a locking frame 106, a locking component 107 and a plurality of placement structures 109, wherein the placement structure 109 comprises a placement frame 110 and two fixing components 111, wherein the fixing component 111 comprises a bracket 112, an operating accessory 113, a telescopic cylinder 114, a connecting plate 115, a guide accessory 116 and a resisting block 11 7. The connector 105 includes a connecting portion 118 and a docking block 119, the locking member 107 includes a locking screw 120 and a latch 121, the operating accessory 113 includes an operating screw 122 and a knob 123, and the guide accessory 116 includes a guide cylinder 124 and a guide rod 125. The above-mentioned solution solves the problem that in the existing alumina ceramic diaphragm sintering device, the green embryo is placed on the base without being fixed, and the green embryo mold may move around during the sintering process due to the flat surface of the base, thereby affecting the sintering effect.

[0036] According to this specific embodiment, the U-shaped heating rods are evenly assembled through the hanging rack 103 inside the firing furnace 101 .

[0037] The high temperature resistant sealing baffle 104 is rotatably connected to the firing furnace 101 and is located on one side of the firing furnace 101; the plug-in component 105 is arranged on one side of the high temperature resistant sealing baffle 104; the locking frame 106 is fixedly connected to the firing furnace 101 and is located on one side of the firing furnace 101; the locking component is arranged on one side of the locking frame 106; the plurality of placement structures 109 are respectively located on one side of the base 102; the placement frame 110 is fixedly connected to the base 102 and is located on one side of the base 102; The two fixing members 111 are respectively arranged on both sides of the placing frame 110; the bracket 112 is fixedly connected to the placing frame 110 and is located on one side of the placing frame 110; the operating attachment 113 is arranged on one side of the bracket 112; the telescopic cylinder 114 is threadedly connected to the operating attachment 113 and is located on one side of the operating attachment 113; the connecting plate 115 is fixedly connected to the telescopic cylinder 114 and is located on the same side of the telescopic cylinder; the guiding attachment 116 is respectively arranged on the bracket 112 and the connecting plate 115 The abutment block 117 is fixedly connected to the connecting plate 115 and is located on one side of the connecting plate 115. The U-shaped heating rod is evenly assembled by the hanging frame 103 on the inside of the firing furnace 101, and the prepared alumina ceramic diaphragm blank is placed in the corresponding placement frame 110. The corresponding operation accessory 113 is operated to drive the telescopic cylinder 114 to push the connecting plate 115. When the connecting plate 115 moves, the guide accessory 116 provides a limit so that the abutment block 117 abuts against the alumina ceramic. The ceramic diaphragm blank is then closed and buckled with the high temperature resistant sealing baffle 104, the connector 105 is inserted into the locking frame 106 and fixed by the locking piece 107, and the U-shaped heating rod assembled on the hanging frame 103 is started externally to heat and sinter the alumina ceramic diaphragm blank, thereby solving the problem of the existing alumina ceramic diaphragm sintering device that the blank is not fixed after being placed on the base. Since the surface of the base is flat, the blank mold may move around during the sintering process, affecting the sintering effect.

[0038] Secondly, the connecting part 118 is fixedly connected to the high temperature resistant sealing baffle 104 and is located on one side of the high temperature resistant sealing baffle 104; the docking block 119 is fixedly connected to the connecting part 118 and is located on one side of the connecting part 118, the connecting part 118 is used to support the assembly of the docking block 119, and the docking block 119 is used to be inserted into the locking frame 106 to buckle the high temperature resistant baffle.

[0039] Again, the locking screw 120 is threadedly connected to the locking frame 106 and is located on one side of the locking frame 106; the latch 121 is fixedly connected to the locking screw 120 and is located on one side of the locking screw 120. When the docking block 119 is inserted into the locking frame 106, the locking screw 120 is twisted to drive the latch 121 to be inserted into the docking block 119, thereby completing the fixation of the docking block 119.

[0040] In addition, the operating screw 122 is rotatably connected to the bracket 112, and is threadedly connected to the telescopic cylinder 114, and is located on one side of the bracket 112; the knob 123 is fixedly connected to the operating screw 122, and is located on one side of the operating screw 122. Twisting the operating screw 122 drives the telescopic cylinder 114 to drive the connecting plate 115 to cooperate with the guide accessory 116 to drive the resistance block 117 to resist the alumina ceramic diaphragm embryo.

[0041] Finally, the guide cylinder 124 is fixedly connected to the bracket 112 and is located on one side of the bracket 112; the guide rod 125 is slidably connected to the guide cylinder 124 and is fixedly connected to the connecting plate 115 and is located on one side of the guide cylinder 124, the guide cylinder 124 is used to support the sliding of the guide rod 125, and the guide rod 125 is used to limit the moving position of the connecting plate 115.

[0042] When using the present invention, the U-shaped heating rod is evenly assembled by the hanging frame 103 on the inside of the firing furnace 101, and the prepared alumina ceramic diaphragm blank is placed in the corresponding placement frame 110. The corresponding knob 123 is operated to drive the operating screw 122 to rotate, and the telescopic cylinder 114 is driven to push the connecting plate 115. When the connecting plate 115 moves, the guide attachment 116 provides a limit so that the abutment block 117 abuts against the alumina ceramic diaphragm blank, and then the high temperature resistant sealing baffle 104 and the firing furnace 1 are closed. 01, the docking block 119 on the connecting portion 118 is inserted into the locking frame 106, and then the locking screw 120 is twisted to insert the pin 121 into the docking block 119 to lock the docking block 119, and the U-shaped heating rod assembled on the hanging frame 103 is externally started to heat and sinter the alumina ceramic diaphragm blank, thereby solving the problem of the existing alumina ceramic diaphragm sintering device that the blank is not fixed after being placed on the base. Since the surface of the base is flat, the blank mold may move around during the sintering process, affecting the sintering effect.

[0043] A second embodiment of an alumina ceramic diaphragm sintering device for a sodium-sulfur battery of the present application is:

[0044] Based on the first embodiment, please refer to Figure 4-Figure 5 ,in, Figure 4 is an overall front view of a second embodiment of an alumina ceramic diaphragm sintering device for a sodium-sulfur battery according to the present invention, Figure 5 It is a schematic diagram of the overall structure of a second embodiment of an alumina ceramic diaphragm sintering device for a sodium-sulfur battery according to the present invention.

[0045] The alumina ceramic diaphragm sintering device for sodium-sulfur battery provided by the present invention further includes a heat preservation component 201, which is arranged on one side of the firing furnace 101, and the heat preservation component 201 includes a rock wool layer 202, a high temperature resistant lining 203, heat insulation sand 204 and a heat insulation cover 205;

[0046] According to this specific embodiment, the rock wool layer 202 is fixedly connected to the firing furnace 101 and is located on one side of the firing furnace 101; the high temperature resistant lining 203 is fixedly connected to the firing furnace 101 and is located inside the firing furnace 101; the thermal insulation sand 204 is fixedly connected to the rock wool layer 202 and is located on one side of the rock wool layer 202; the thermal insulation cover 205 is fixedly connected to the thermal insulation sand 204 and is located on one side of the thermal insulation sand 204. The rock wool layer 202 cooperates with the thermal insulation sand 204 to prevent the temperature of the firing furnace 101 from dissipating, and the thermal insulation cover 205 is used to block the interaction of internal and external gases. The high temperature resistant lining 203 can withstand high temperatures exceeding 1650°C and generates heat evenly. It does not absorb sodium vapor volatilized during the ceramic tube process, thereby increasing the service life of the firing furnace 101.

[0047] When using the present invention, the rock wool layer 202 cooperates with the thermal insulation sand 204 to prevent the temperature of the firing furnace 101 from dissipating, and the thermal insulation cover 205 is used to block the interaction of internal and external gases. The high temperature resistant lining 203 can withstand high temperatures exceeding 1650°C and generates heat evenly. It does not absorb the sodium vapor volatilized during the ceramic tube process, thereby increasing the service life of the firing furnace 101.

[0048] In a second aspect, the present invention also provides a method for sintering an alumina ceramic diaphragm for a sodium-sulfur battery. Figure 6 ,in, Figure 6 The present invention is a flow chart of a method for sintering an alumina ceramic diaphragm for a sodium-sulfur battery.

[0049] The present invention also provides a method for sintering an alumina ceramic diaphragm for a sodium-sulfur battery, comprising:

[0050] S1 Evenly assemble the U-shaped heating rods through the bracket 103 inside the firing furnace 101

[0051] S2: Place the prepared alumina ceramic diaphragm blank in the corresponding placement frame 110

[0052] The operating accessory 113 corresponding to the operation S3 drives the telescopic cylinder 114 to push the connecting plate 115;

[0053] When the S4 connecting plate 115 moves, the guide attachment 116 provides a limit so that the abutment block 117 abuts against the alumina ceramic diaphragm blank;

[0054] S5 then closes the high temperature resistant sealing baffle 104 and engages it with the firing furnace 101;

[0055] S6 The connector 105 is inserted into the locking frame 106 and fixed by the locking member 107;

[0056] S7: The U-shaped heating rod mounted on the external starting bracket 103 is used to heat and sinter the alumina ceramic diaphragm blank.

[0057] The present invention provides a method for firing an alumina ceramic diaphragm for a sodium-sulfur battery. The U-shaped heating rod is evenly assembled on the hanging frame 103 inside the firing furnace 101, and the prepared alumina ceramic diaphragm blank is placed in the corresponding placement frame 110. The corresponding knob 123 is operated to drive the operating screw 122 to rotate, and the telescopic cylinder 114 is driven to push the connecting plate 115. When the connecting plate 115 moves, the guide attachment 116 provides a limit so that the abutment block 117 abuts against the alumina ceramic diaphragm blank, and then the high temperature resistant sealing baffle 112 is closed. 04 is buckled with the firing furnace 101, the docking block 119 on the connecting portion 118 is inserted into the locking frame 106, and then the locking screw 120 is twisted to insert the pin 121 into the docking block 119 to lock the docking block 119, and the U-shaped heating rod assembled on the hanging bracket 103 is started externally to heat and sinter the alumina ceramic diaphragm blank, thereby solving the problem of the existing alumina ceramic diaphragm sintering device that the blank is not fixed after being placed on the base. Since the surface of the base is flat, the blank mold may move around during the sintering process, affecting the sintering effect.

[0058] For the third aspect, please refer to 7. Figure 7 The present invention also provides an alumina ceramic diaphragm for a sodium-sulfur battery, which is sintered by the alumina ceramic diaphragm sintering method for a sodium-sulfur battery.

[0059] The present invention discloses an alumina ceramic diaphragm for a sodium-sulfur battery. The alumina ceramic diaphragm blank prepared in advance is placed in the firing furnace 101, and is heated and sintered by the firing furnace 101 and a U-shaped heating rod hung inside. After sintering, the alumina ceramic diaphragm for a sodium-sulfur battery is obtained. The sintered alumina ceramic diaphragm has good chemical stability at high temperature, high mechanical strength, and high ionic conductivity.

[0060] 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 sintering device for an alumina ceramic diaphragm of a sodium-sulfur battery, comprising a firing furnace, a base and a hanging bracket, wherein the base is located at the bottom of the firing furnace; the hanging bracket is fixedly connected to the firing furnace and is located on one side of the firing furnace; characterized in that: Also includes sintered components, The sintering assembly includes a high temperature resistant sealing baffle, a plug-in component, a locking frame, a locking component and a plurality of placement structures; The high temperature resistant sealing baffle is rotatably connected to the firing furnace and is located on one side of the firing furnace; the plug-in is arranged on one side of the high temperature resistant sealing baffle; the locking frame is fixedly connected to the firing furnace and is located on one side of the firing furnace; the locking member is arranged on one side of the locking frame; a plurality of the placement structures are respectively located on one side of the base; the placement structure comprises a placement frame and two fixing members, the placement frame is fixedly connected to the base and is located on one side of the base; the two fixing members are respectively arranged on both sides of the placement frame; the fixing members comprise a bracket, an operating accessory, a telescopic cylinder, a connecting plate, a guide accessory and a resistance block, the bracket is fixedly connected to the placement frame and is located on one side of the placement frame; the operating accessory is arranged on one side of the bracket; the telescopic cylinder is threadedly connected to the operating accessory and is located on one side of the operating accessory; the connecting plate is fixedly connected to the telescopic cylinder and is located on the same side of the telescope; the guide accessories are respectively arranged between the bracket and the connecting plate; the resistance block is fixedly connected to the connecting plate and is located on one side of the connecting plate.

2. The alumina ceramic diaphragm sintering device for sodium-sulfur battery according to claim 1, characterized in that: The connector includes a connecting portion and a docking block. The connecting portion is fixedly connected to the high temperature resistant sealing baffle and is located on one side of the high temperature resistant sealing baffle; the docking block is fixedly connected to the connecting portion and is located on one side of the connecting portion.

3. The alumina ceramic diaphragm sintering device for sodium-sulfur battery according to claim 2, characterized in that: The locking member includes a locking screw and a latch, wherein the locking screw is threadedly connected to the locking frame and is located at one side of the locking frame; the latch is fixedly connected to the locking screw and is located at one side of the locking screw.

4. The alumina ceramic diaphragm sintering device for sodium-sulfur battery according to claim 3, characterized in that: The operating attachment includes an operating screw and a knob. The operating screw is rotatably connected to the bracket and is threadedly connected to the telescopic cylinder and is located on one side of the bracket; the knob is fixedly connected to the operating screw and is located on one side of the operating screw.

5. The alumina ceramic diaphragm sintering device for sodium-sulfur battery according to claim 4, characterized in that: The guide attachment includes a guide cylinder and a guide rod. The guide cylinder is fixedly connected to the bracket and is located at one side of the bracket. The guide rod is slidably connected to the guide cylinder and fixedly connected to the connecting plate and is located at one side of the guide cylinder.

6. A method for sintering an alumina ceramic diaphragm for a sodium-sulfur battery, applied to an alumina ceramic diaphragm sintering device for a sodium-sulfur battery according to any one of claims 1 to 5, characterized in that: include: The U-shaped heating rods are evenly assembled through the hanging rack inside the firing furnace; Placing the prepared alumina ceramic diaphragm blank in a corresponding placement frame; Operate the corresponding operating accessories to drive the telescopic cylinder to push the connecting plate; When the connecting plate moves, the guide attachment provides a limit so that the abutment block abuts against the alumina ceramic diaphragm blank; Then close the high temperature resistant sealing baffle and fasten it to the firing furnace; The plug-in connector is inserted into the locking frame and fixed by the locking member; A U-shaped heating rod mounted on an external starting bracket heats and sintered the alumina ceramic diaphragm blank.

7. An alumina ceramic diaphragm for sodium-sulfur battery, characterized in that: The alumina ceramic diaphragm for sodium-sulfur battery is sintered using the sintering method of claim 6.

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