A sodium-sulfur battery solid electrolyte tube sintering device

Abstract

The invention discloses a sodium-sulfur battery solid electrolyte tube sintering device, which includes a furnace body and a trolley for sealing the bottom of the furnace body; the furnace body includes a double-layer shell, a cooling fan located in the interlayer of the double-layer shell, and The inner protective layer located inside the double-layer shell, the inner protective layer is laminated by low heat capacity and high temperature resistant fiberboard; the top of the furnace body is provided with an exhaust hole and a heating element, and the exhaust hole passes through An exhaust cover that can be opened and closed automatically is closed; the trolley is made of laminated low heat capacity and high temperature resistant fiberboards, and is reinforced by ceramic rods inserted vertically and evenly into the low heat capacity and high temperature resistant fiberboards. Its technical effect is: under the premise of ensuring the uniform temperature field and atmosphere in the furnace body during the sintering process, it can discharge the organic volatiles, smoke and waste gas generated in the low-temperature debinding stage, and realize the integration of debinding and sintering , and can shorten the sintering time, improve the production efficiency and ensure the consistency of the electrochemical performance of the solid electrolyte tube.

Description

technical field [0001] The invention relates to the field of sintering technology, in particular to a sintering device for a solid electrolyte tube of a sodium-sulfur battery. Background technique [0002] Solid Electrolyte β″-Al 2 o 3 Ceramics have good Na + Conductivity, its ionic conductivity can reach 10 at room temperature -2 S / cm order of magnitude, solid electrolyte β″-Al 2 o 3 Solid electrolyte tubes made of ceramics are the core components of sodium-sulfur battery systems. In the application process, solid electrolyte tubes are required to have high ionic conductivity, high strength, and uniform and dense microstructure. The high-temperature sintering process of solid electrolyte tubes into porcelain is a key step in battery preparation, which has a decisive impact on the assembly, performance and manufacturing cost of sodium-sulfur batteries. [0003] At present, the equipment used for sintering solid electrolyte tubes is generally a high-temperature gas shu...

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Problems solved by technology

[0003] At present, the equipment used for sintering solid electrolyte tubes is generally a high-temperature gas shuttle kiln or an ordinary electric furnace. The lining material is generally alumina hollow ball refractory bricks, and the outer layer is heavy refractory bricks. The thermal insulation performance is good, but it is not conducive to Heat dissipation, the sintering time is too long; and in order to eliminate the organic binder and water vapor in the solid electrolyte tube green body, it generally needs to go through two steps of debinding and sintering, which further increases the sintering time; at the same time, because the solid electrolyte tube is in the During the sintering process, alkaline atmospheres such as Na and Li will volatilize. Too long sintering time is not only not conducive to production efficiency, but also not conducive to the stability of the composition of the solid electrolyte tube, which in turn affects the consistency of the electrochemical performance of the sodium-sulfur battery.

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