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The invention discloses a preparation method for in-situ generation of a graphene-doped magnesium diboride bulk, which comprises the following steps: 1, mixing melamine or carbon nitride with magnesium powder, and carrying out ball milling to obtain a mixture containing graphene and magnesium nitride; 2, introducing argon gas into the ball milling tank, exhausting the gas, and heating the mixture to obtain a graphene mixture attached with magnesium nitride; and 3, mixing and grinding the graphene mixture attached with magnesium nitride, magnesium powder and boron powder, briquetting, and sintering to obtain the graphene-doped magnesium diboride bulk. The melamine or carbon nitride and magnesium powder are mixed and subjected to ball milling, graphene is generated in situ, magnesium nitride particles are attached to graphene, magnesium diboride is generated through subsequent sintering, meanwhile, graphene is promoted to enter magnesium diboride crystal lattices to achieve effective doping, active magnesium is provided through decomposition of magnesium nitride, low-temperature preparation is achieved, the superconducting performance of the graphene-doped magnesium diboride bulk is enhanced, and the problem that the superconducting performance is reduced due to high-temperature heat treatment doping is solved.
本发明公开了一种原位生成石墨烯掺杂二硼化镁块材的制备方法，该方法包括：一、将三聚氰胺或氮化碳与镁粉混合球磨，得到含有石墨烯、氮化镁的混合物；二、向球磨罐中通入氩气并抽气，对混合物加热得到附着氮化镁的石墨烯混合物；三、将附着氮化镁的石墨烯混合物与镁粉和硼粉混合研磨后压块、烧结，得到石墨烯掺杂二硼化镁块材。本发明通过将三聚氰胺或者氮化碳与镁粉混合球磨，原位生成石墨烯并使氮化镁颗粒附着在石墨烯中，后续烧结生成二硼化镁的同时促进石墨烯进入二硼化镁晶格中实现有效掺杂，且氮化镁的分解提供了活性镁，实现了低温制备，增强了石墨烯掺杂二硼化镁块材的超导性能，解决了高温度热处理掺杂导致超导性能下降的难题。
The invention discloses a preparation method for in-situ generation of a graphene-doped magnesium diboride bulk, which comprises the following steps: 1, mixing melamine or carbon nitride with magnesium powder, and carrying out ball milling to obtain a mixture containing graphene and magnesium nitride; 2, introducing argon gas into the ball milling tank, exhausting the gas, and heating the mixture to obtain a graphene mixture attached with magnesium nitride; and 3, mixing and grinding the graphene mixture attached with magnesium nitride, magnesium powder and boron powder, briquetting, and sintering to obtain the graphene-doped magnesium diboride bulk. The melamine or carbon nitride and magnesium powder are mixed and subjected to ball milling, graphene is generated in situ, magnesium nitride particles are attached to graphene, magnesium diboride is generated through subsequent sintering, meanwhile, graphene is promoted to enter magnesium diboride crystal lattices to achieve effective doping, active magnesium is provided through decomposition of magnesium nitride, low-temperature preparation is achieved, the superconducting performance of the graphene-doped magnesium diboride bulk is enhanced, and the problem that the superconducting performance is reduced due to high-temperature heat treatment doping is solved.
本发明公开了一种原位生成石墨烯掺杂二硼化镁块材的制备方法，该方法包括：一、将三聚氰胺或氮化碳与镁粉混合球磨，得到含有石墨烯、氮化镁的混合物；二、向球磨罐中通入氩气并抽气，对混合物加热得到附着氮化镁的石墨烯混合物；三、将附着氮化镁的石墨烯混合物与镁粉和硼粉混合研磨后压块、烧结，得到石墨烯掺杂二硼化镁块材。本发明通过将三聚氰胺或者氮化碳与镁粉混合球磨，原位生成石墨烯并使氮化镁颗粒附着在石墨烯中，后续烧结生成二硼化镁的同时促进石墨烯进入二硼化镁晶格中实现有效掺杂，且氮化镁的分解提供了活性镁，实现了低温制备，增强了石墨烯掺杂二硼化镁块材的超导性能，解决了高温度热处理掺杂导致超导性能下降的难题。
Preparation method for in-situ generation of graphene-doped magnesium diboride bulk
一种原位生成石墨烯掺杂二硼化镁块材的制备方法
TANG JING (author)
2021-09-07
Patent
Electronic Resource
Chinese
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