A method for preparing carbon-based wave-absorbing materials by carbonizing organic matter at high temperature
A technology of high-temperature carbonization and wave-absorbing materials, applied in the field of wave-absorbing materials, can solve the problems of poor wave-absorbing effect, complicated preparation process, high density, etc., and achieve the effects of low price, good repeatability and low density
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Embodiment 1
[0027] Example 1: Using the product of the hydrothermal reaction of sugar as a precursor, the specific steps for obtaining a carbon-based wave-absorbing material after high-temperature carbonization in a protective atmosphere are as follows:
[0028] (1) Hydrothermal carbonization of sugar: Prepare a solution of sucrose and deionized water at a molar ratio of 1:100, stir evenly and pour it into a polytetrafluoroethylene lining, put the lining into a stainless steel reaction kettle, place Reaction in a muffle furnace, the reaction temperature is 180°C, and the reaction time is 12 hours, so that the sugar can be fully converted into precursors through organic reactions such as dehydration and polycondensation;
[0029] (2) High-temperature carbonization of precursors: Take an appropriate amount of precursors in a corundum crucible, cover the crucible, and put it into a furnace for high-temperature carbonization treatment. The carbonization temperature is 800°C, the carbonization ...
Embodiment 2
[0034] Using the product of sugar hydrothermal reaction as a precursor, under a protective atmosphere, the specific steps of a carbon-based absorbing material prepared by carbonizing organic matter at a high temperature are as follows:
[0035] (1) Hydrothermal carbonization of sugar: Glucose and deionized water are prepared into a solution at a molar ratio of 1:50, stirred evenly and poured into a polytetrafluoroethylene lining, and the lining is put into a stainless steel reaction kettle, placed in Reaction in a muffle furnace, the reaction temperature is 160°C, and the reaction time is 20 hours, so that the sugar can be fully converted into precursors through organic reactions such as dehydration and polycondensation;
[0036] (2) High-temperature carbonization of precursors: Take an appropriate amount of precursors in a corundum crucible, cover the crucible, and put it into a furnace for high-temperature carbonization. The carbonization temperature is 700°C, the carbonizati...
Embodiment 3
[0041] Using the product of sugar hydrothermal reaction as a precursor, under a protective atmosphere, the specific steps of a carbon-based absorbing material prepared by carbonizing organic matter at a high temperature are as follows:
[0042] (1) Hydrothermal carbonization of sugar: prepare a solution of fructose and deionized water at a molar ratio of 1:250, stir evenly and pour it into a polytetrafluoroethylene lining, put the lining into a stainless steel reaction kettle, place Reaction in a muffle furnace, the reaction temperature is 200°C, and the reaction time is 6 hours, so that the sugar can be fully converted into precursors through organic reactions such as dehydration and polycondensation;
[0043] (2) High-temperature carbonization of precursors: Take an appropriate amount of precursors in a corundum crucible, cover the crucible, and put it into a furnace for high-temperature carbonization. The carbonization temperature is 900°C, the carbonization time is 60min, a...
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