Integrated device and method for homogenization/defoaming of ceramic precursor polymer spinning melt

Abstract

Disclosed are a device and method for homogenizing / defoaming integrated ceramic precursor polymer spinning melt. The device includes a degassing kettle body, the upper part of the degassing kettle body or the upper cover of the kettle body is provided with a feeding metering pump, the bottom of the degassing kettle body is provided with a spinning metering pump, and the inner cavity of the degassing kettle is sequentially arranged from top to bottom. Set No. 1 umbrella-shaped diversion surface, No. 2 anti-umbrella-shaped diversion surface, No. 3 umbrella-shaped diversion surface, No. 4 diversion uniform temperature arc surface, No. 1 umbrella-shaped diversion surface, No. A first overflow seam and a second overflow seam are provided at the joints between the flow surface and the inner wall of the degassing kettle. The present invention also includes a homogenizing / degassing method using a homogenizing / degassing integrated device for ceramic precursor polymer spinning melt. The invention cleans the air bubbles in the spinning melt, realizes uniform temperature and uniform viscosity of the melt, improves defoaming efficiency and melt viscosity uniformity, and avoids the interruption, deformation and Fiber breakage reduces the defects of the original fiber and improves the performance of the finished ceramic fiber.

Description

technical field [0001] The invention belongs to the field of fiber preparation, and in particular relates to a device and method for homogenizing / defoaming integrated ceramic precursor polymer spinning melt. Background technique [0002] Continuous SiC fiber, Si 3 N 4 Fiber, SiBN(C) fiber and other high-performance continuous ceramic fibers are key raw materials for aerospace and military applications due to their high temperature resistance, high strength, high modulus and special electromagnetic properties. The precursor conversion method is a common method for preparing high-performance continuous ceramic fibers. The steps are to first synthesize ceramic precursor polymers such as polycarbosilane, polycarbosilane and polysilazane, and then melt spinning, non-melting and high-temperature heating Solution, the continuous ceramic fiber can be prepared. [0003] The melt spinning of ceramic precursor polymer is a key step in the preparation of continuous ceramic fibers, be...

AI Technical Summary

Problems solved by technology

Obviously, this method has low degassing efficiency, low production capacity, and cannot achieve uniform and thorough degassing of the melt.

On the other hand, due to the large volume of the melting kettle, the heating is generally completed by the heat medium or the electric heating body outside the kettle wall, and the heat transfer is transmitted from the kettle wall to the center of the kettle body, which will inevitably cause the temperature difference between the inside and outside, and the temperature of the melt will increase. The temperature uniformity is poor, which leads to insufficient viscosity uniformity of the melt, which has an adverse effect on fiber spinning and reduces the quality of the raw silk

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