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Preparation method and application of magnesium-aluminum hydrotalcite modified boron carbide-based ceramic
The invention provides a preparation method of magnesium-aluminum hydrotalcite modified boron carbide. The preparation method comprises the following steps: mixing magnesium nitrate and aluminum nitrate to obtain a nitrate aqueous solution; titrating a sodium hydroxide solution into the L-histidine solution to obtain an L-histidine base solution; placing the acid-purified carbon nanotubes in a nitrogen environment, violently stirring, simultaneously dropwise adding a nitronicotinic acid aqueous solution and an L-histidine base solution, stirring at a constant temperature to carry out an intercalation impregnation reaction, carrying out crystallization treatment after the reaction is finished, sequentially carrying out centrifugation, washing, drying and calcination treatment after the crystallization treatment is finished, and uniformly mixing the obtained product with boron carbide micro powder to obtain the boron carbide micro powder. Sequentially carrying out ball milling, tabletting and vacuum heating treatment, introducing inert gas, and cooling to room temperature, so as to obtain magnesium-aluminum hydrotalcite modified boron carbide; according to the technical scheme, the problem that the boron carbide ceramic material which can effectively modify the toughening and densification degree of boron carbide ceramic and is relatively high in high-temperature and high-pressure resistance and corrosion resistance is lacked in the prior art is solved.
本发明提供一种镁铝水滑石修饰碳化硼的制备方法，包括如下步骤：将硝酸镁和硝酸铝混合得到硝酸盐水溶液；将氢氧化钠溶液滴定至L‑组氨酸溶液中，得到L‑组氨酸底液；将酸纯化的碳纳米管置于氮气环境中、剧烈搅拌，同时逐滴加入硝烟酸水溶液和L‑组氨酸底液，恒温搅拌进行插层浸渍反应，反应结束后进行晶化处理，晶化处理结束后依次进行离心、洗涤、干燥和煅烧处理，将其与碳化硼微粉均匀混合，依次进行球磨、压片、真空加热处理，通入惰性气体后冷却至室温，得到镁铝水滑石修饰碳化硼；通过上述技术方案，解决现有技术中缺乏能够有效改性碳化硼陶瓷的增韧与致密化程度、得到具有较强的耐高温高压及耐腐蚀能力的碳化硼陶瓷材料的问题。
Preparation method and application of magnesium-aluminum hydrotalcite modified boron carbide-based ceramic
The invention provides a preparation method of magnesium-aluminum hydrotalcite modified boron carbide. The preparation method comprises the following steps: mixing magnesium nitrate and aluminum nitrate to obtain a nitrate aqueous solution; titrating a sodium hydroxide solution into the L-histidine solution to obtain an L-histidine base solution; placing the acid-purified carbon nanotubes in a nitrogen environment, violently stirring, simultaneously dropwise adding a nitronicotinic acid aqueous solution and an L-histidine base solution, stirring at a constant temperature to carry out an intercalation impregnation reaction, carrying out crystallization treatment after the reaction is finished, sequentially carrying out centrifugation, washing, drying and calcination treatment after the crystallization treatment is finished, and uniformly mixing the obtained product with boron carbide micro powder to obtain the boron carbide micro powder. Sequentially carrying out ball milling, tabletting and vacuum heating treatment, introducing inert gas, and cooling to room temperature, so as to obtain magnesium-aluminum hydrotalcite modified boron carbide; according to the technical scheme, the problem that the boron carbide ceramic material which can effectively modify the toughening and densification degree of boron carbide ceramic and is relatively high in high-temperature and high-pressure resistance and corrosion resistance is lacked in the prior art is solved.
本发明提供一种镁铝水滑石修饰碳化硼的制备方法，包括如下步骤：将硝酸镁和硝酸铝混合得到硝酸盐水溶液；将氢氧化钠溶液滴定至L‑组氨酸溶液中，得到L‑组氨酸底液；将酸纯化的碳纳米管置于氮气环境中、剧烈搅拌，同时逐滴加入硝烟酸水溶液和L‑组氨酸底液，恒温搅拌进行插层浸渍反应，反应结束后进行晶化处理，晶化处理结束后依次进行离心、洗涤、干燥和煅烧处理，将其与碳化硼微粉均匀混合，依次进行球磨、压片、真空加热处理，通入惰性气体后冷却至室温，得到镁铝水滑石修饰碳化硼；通过上述技术方案，解决现有技术中缺乏能够有效改性碳化硼陶瓷的增韧与致密化程度、得到具有较强的耐高温高压及耐腐蚀能力的碳化硼陶瓷材料的问题。
Preparation method and application of magnesium-aluminum hydrotalcite modified boron carbide-based ceramic
一种镁铝水滑石修饰碳化硼基陶瓷的制备方法及其应用
TONG SHANGHUI (Autor:in)
09.12.2022
Patent
Elektronische Ressource
Chinesisch
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