Preparation method for hexagonal boron nitride fiber
A technology for boron nitride fibers and precursor fibers, which is applied in the field of preparation of hexagonal boron nitride fibers, can solve the problems of expensive finished products, harsh process conditions, long synthesis process routes, etc., and achieves the effects of cheap raw materials and simple process
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0018] (1) Preparation of precursor: Put a beaker containing 400ml of deionized water into a constant temperature water bath, and when heated to 60°C, add 6.6g of boric acid, continue to heat up to 90°C, add 13.4g of melamine, turn on the electromagnetic stirrer and stir. 20min until the boric acid and melamine are completely dissolved into a transparent solution. The above solution is allowed to stand for 24 hours to obtain a white flocculent precipitate, the solution is suction filtered, and the filter residue is taken and dried at 80° C. to obtain the precursor fiber.
[0019] (2) Carbon removal: The precursor fiber is heated from room temperature to 550℃ in the air for 2 hours, and the carbon in the precursor fiber is removed by calcination. After the heat preservation is completed, the furnace nozzle is sealed and the temperature is continued to rise. Start to pass in nitrogen as a protective gas, and the nitrogen flow rate is 1.5L / min.
[0020] (3) Nitriding treatment: When ...
Embodiment 2
[0023] (1) Preparation of precursor: Put a beaker containing 400ml of deionized water into a constant temperature water bath, and when heated to 70°C, add 6.6g of boric acid, continue to heat up to 90°C, add 14.8g of melamine, turn on the electromagnetic stirrer to stir 30min until boric acid and melamine are completely dissolved into a transparent solution. The above solution was allowed to stand for 18 hours to obtain a white flocculent precipitate, the solution was suction filtered, and the filter residue was taken and dried at 80° C. to obtain the precursor fiber.
[0024] (2) Carbon removal: the precursor fiber is heated in the air from room temperature to 500℃ for 2 hours, and the carbon in the precursor fiber is removed by calcination. After the heat preservation is completed, the furnace nozzle is sealed and the temperature is continued. At the same time Begin to pass in nitrogen as a protective gas, and the nitrogen flow rate is 1.8L / min.
[0025] (3) Nitriding treatment:...
Embodiment 3
[0028] (1) Preparation of precursor: Put a beaker containing 400ml deionized water into a constant temperature water bath device, add 6.6g boric acid when heated to 70℃, continue to heat up to 100℃, add 17.4g melamine, turn on the electromagnetic stirrer to stir 30min until boric acid and melamine are completely dissolved into a transparent solution. The above solution was allowed to stand for 18 hours to obtain a white flocculent precipitate, the solution was suction filtered, and the filter residue was taken and dried at 80° C. to obtain the precursor fiber.
[0029] (2) Carbon removal: The precursor fiber is heated from room temperature to 550℃ in the air for 2 hours, and the carbon in the precursor fiber is removed by calcination. After the heat preservation is completed, the furnace nozzle is sealed and the temperature is continued to rise. Start to pass in nitrogen as a protective gas, and the nitrogen flow rate is 1.5L / min.
[0030] (3) Nitriding treatment: When the tempera...
PUM
Login to View More Abstract
Description
Claims
Application Information
Login to View More