Silicon carbide saggar for calcining lithium battery positive electrode material, and production method thereof

Abstract

The invention relates to a silicon carbide saggar for calcining a lithium battery positive electrode material, and a production method thereof. The production method comprises the following steps: using 40-55 wt% of alumina powder, 30-40 wt% of zircon and 10-20 wt% of Suzhou clay as a mixture, adding vanadium pentoxide accounting for 4-6 wt% of the mixture and water accounting for 5-8 wt% of the mixture, and performing uniform mixing to obtain a working layer mixture; using 30-45 wt% of talcum, 10-20 wt% of alumina powder and 40-50 wt% of Suzhou clay as a matrix material, adding water, performing ball milling, and drying and crushing the obtained matrix material solution to obtain a matrix powder; using 60-75 wt% of silicon carbide aggregates and 25-40 wt% of the matrix powder as raw materials, adding a binder accounting for 5-10 wt% of the raw materials, and performing uniform mixing and molding; distributing a layer of the working layer mixture on the bottom working surface of a molded saggar matrix, and performing machine pressing and drying; and performing heat insulation at 1370-1400 DEG C for 8-10 h to produce the silicon carbide saggar for calcining a lithium battery positive electrode material. The production method has the advantages of low cost, energy saving and environmental protection, and the product produced in the invention has the advantages of good thermal shock stability, excellent erosion resistance and long life.

Description

technical field [0001] The invention belongs to the technical field of saggers. In particular, it relates to a silicon carbide sagger for firing lithium battery cathode materials and a preparation method thereof. Background technique [0002] Lithium-ion battery is a new generation of green battery, widely used in mobile communications, military, aerospace and information science fields. Lithium-ion battery cathode materials are an important part of lithium-ion batteries. In actual production, the high-temperature solid-state synthesis method is the main method for preparing lithium-ion battery cathode materials due to its simple process and low equipment requirements. It is to directly mix the required raw materials in a solid form through mechanical stirring, ball milling or tablet pressing, and then undergo high-temperature roasting, cooling and crushing processes to finally obtain the desired product. Sagger, as a container for raw materials in the high-temperature roa...

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Problems solved by technology

"Zircon mullite sagger" (ZL201410189300.9) patent technology, a method of preparing saggar with mullite, tabular alumina and zircon sand as raw materials, the sagger has excellent thermal shock stability, but the raw material is expensive, The firing temperature is too high, which is not conducive to mass production