A kind of preparation method of glassy carbon material based on modified phenolic resin precursor
A technology of phenolic resin and glassy carbon, which is applied in the direction of carbon preparation/purification, etc., can solve the problems of inability to form block materials of various shapes and specifications at one time, glassy carbon thickness limitation, etc., and achieve short preparation time and low energy consumption , the effect of improving production efficiency
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Embodiment 1
[0024] The oxidation-resistant modified phenolic resin was dissolved in ethanol at a mass ratio of 40 wt%.
[0025] The solution prepared in the above steps is then poured into the mold and placed in an oven for low-temperature curing. When curing, raise the temperature to 60-80°C at a heating rate of 2°C / h, and keep it for 10 hours; 120°C, heat preservation for 10h; then raise the temperature to 150°C at a heating rate of 2°C / h, and heat preservation for 20h; after cooling down, a glass charcoal green body is prepared.
[0026] The prepared glassy carbon green body is placed in a carbonization furnace for carbonization treatment. During carbonization, heat up to 250°C at a heating rate of 30°C / h, and hold for 2 hours; raise the temperature from 250°C to 550°C at a heating rate of 20°C / h, and hold for 2 hours; then raise the temperature to 1000°C at a heating rate of 20°C / h ℃, keep warm for 2h; cool down to room temperature to obtain glassy carbon.
[0027] In order to furt...
Embodiment 2
[0032] The anti-oxidation modified modified phenolic resin is dissolved in ethanol at a mass ratio of 50 wt%.
[0033] The solution prepared in the above steps is then poured into the mold and placed in an oven for low-temperature curing. When curing, heat up to 60-80°C at a heating rate of 1°C / h, and hold for 10 hours; heat up from 80°C to 100°C at a heating rate of 1°C / h, and hold for 10 hours; 120°C, keep warm for 10h; then raise the temperature to 150°C at a heating rate of 1°C / h, keep warm for 20h; cool down, and make a glass charcoal green body.
[0034] The prepared glassy carbon green body is placed in a carbonization furnace for carbonization treatment. During carbonization, raise the temperature to 270°C at a heating rate of 20°C / h, and hold for 2 hours; raise the temperature from 270°C to 650°C at a heating rate of 15°C / h, and hold for 2 hours; then raise the temperature to 1050°C at a heating rate of 15°C / h ℃, keep warm for 2h; cool down to room temperature to ob...
Embodiment 3
[0040] The anti-oxidation modified modified phenolic resin is dissolved in ethanol at a mass ratio of 60 wt%.
[0041] The solution prepared in the above steps is then poured into the mold and placed in an oven for low-temperature curing. When curing, heat up to 60-80°C at a heating rate of 0.5°C / h, and keep it for 10 hours; 120°C, keep warm for 10h; then raise the temperature to 150°C at a heating rate of 0.5°C / h, keep warm for 20h; cool down to prepare a glass carbon green body.
[0042] The prepared glassy carbon green body is placed in a carbonization furnace for carbonization treatment. During carbonization, heat up to 300°C at a heating rate of 10°C / h, and hold for 2 hours; raise the temperature from 300°C to 700°C at a heating rate of 10°C / h, and hold for 2 hours; then raise the temperature to 1100°C at a heating rate of 10°C / h ℃, keep warm for 2h; cool down to room temperature to obtain glassy carbon.
[0043] Put the glassy carbon prepared in the above steps into a h...
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