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Preparation method of carbon/carbon composite material for resisting calcium and magnesium crystallization in MnO2 electrolysis process
The invention discloses a preparation method of a carbon/carbon composite material for resisting calcium and magnesium crystallization in an MnO2 electrolysis process. The preparation method comprisesthe following steps: (1) impregnating a mixture of graphite-graphene powder and a carbon fiber woven felt into flowable modified petroleum asphalt to obtain a graphite-graphene/carbon fiber woven blank/asphalt impregnated blank; (2) carrying out gradient heating carbonization on the graphite-graphene/carbon fiber woven blank/asphalt impregnated blank in a high-temperature carbonization furnace under the protection of argon, and repeating the impregnation and carbonization processes until pores of the preform are densified; and (3) carrying out high-temperature gradient thermal decomposition on gaseous hydrocarbon by adopting a chemical vapor deposition process, and depositing the gaseous hydrocarbon on the surface of the carbon/carbon composite material preform to obtain the carbon/carboncomposite material. The method is simple in technological process and easy in technological parameter control, and the obtained material is good in electric conduction and heat conduction performance, high in strength, high in surface smoothness and not prone to forming calcium-magnesium crystal nucleuses, and can be used as a cathode material for preventing calcium-magnesium crystal deposition in the wet electrolysis process.
本发明公开了一种抗电解MnO2过程钙镁结晶用碳/碳复合材料的制备方法，包括如下步骤：(1)将石墨‑石墨烯粉与碳纤维编织毡的混合物浸渍于可流动的改性石油沥青中得到石墨‑石墨烯/碳纤维编织坯/沥青浸渍坯体；(2)将石墨‑石墨烯/碳纤维编织坯/沥青浸渍坯体在氩气保护下的高温碳化炉中梯度升温碳化,重复浸渍并碳化过程至预制体孔隙致密化；(3)采用化学气相表面沉积工艺高温梯度热分解气态烃并沉积于碳/碳复合材料预制体表面得到碳/碳复合材料。本发明工艺过程简单，工艺参数易控，所得材料导电导热性能良好，强度高，且表面光洁度高，不易形成钙镁结晶晶核，可作为用于湿法电解过程中抗钙镁结晶沉积的阴极材料。
Preparation method of carbon/carbon composite material for resisting calcium and magnesium crystallization in MnO2 electrolysis process
The invention discloses a preparation method of a carbon/carbon composite material for resisting calcium and magnesium crystallization in an MnO2 electrolysis process. The preparation method comprisesthe following steps: (1) impregnating a mixture of graphite-graphene powder and a carbon fiber woven felt into flowable modified petroleum asphalt to obtain a graphite-graphene/carbon fiber woven blank/asphalt impregnated blank; (2) carrying out gradient heating carbonization on the graphite-graphene/carbon fiber woven blank/asphalt impregnated blank in a high-temperature carbonization furnace under the protection of argon, and repeating the impregnation and carbonization processes until pores of the preform are densified; and (3) carrying out high-temperature gradient thermal decomposition on gaseous hydrocarbon by adopting a chemical vapor deposition process, and depositing the gaseous hydrocarbon on the surface of the carbon/carbon composite material preform to obtain the carbon/carboncomposite material. The method is simple in technological process and easy in technological parameter control, and the obtained material is good in electric conduction and heat conduction performance, high in strength, high in surface smoothness and not prone to forming calcium-magnesium crystal nucleuses, and can be used as a cathode material for preventing calcium-magnesium crystal deposition in the wet electrolysis process.
本发明公开了一种抗电解MnO2过程钙镁结晶用碳/碳复合材料的制备方法，包括如下步骤：(1)将石墨‑石墨烯粉与碳纤维编织毡的混合物浸渍于可流动的改性石油沥青中得到石墨‑石墨烯/碳纤维编织坯/沥青浸渍坯体；(2)将石墨‑石墨烯/碳纤维编织坯/沥青浸渍坯体在氩气保护下的高温碳化炉中梯度升温碳化,重复浸渍并碳化过程至预制体孔隙致密化；(3)采用化学气相表面沉积工艺高温梯度热分解气态烃并沉积于碳/碳复合材料预制体表面得到碳/碳复合材料。本发明工艺过程简单，工艺参数易控，所得材料导电导热性能良好，强度高，且表面光洁度高，不易形成钙镁结晶晶核，可作为用于湿法电解过程中抗钙镁结晶沉积的阴极材料。
Preparation method of carbon/carbon composite material for resisting calcium and magnesium crystallization in MnO2 electrolysis process
一种抗电解MnO2过程钙镁结晶用碳/碳复合材料的制备方法
YU LINPING (author) / LI QING (author) / WAN WEIHUA (author) / CHEN QIZHI (author) / HE JIN (author) / SHEN WEIJUN (author)
2020-11-20
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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