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Preparation method and application of multilayer graphite coated aluminum nitride ceramic powder
The invention discloses a preparation method and application of multi-layer graphite coated aluminum nitride ceramic powder. According to the application, graphene-coated aluminum nitride powder serves as a heat-conducting wave-absorbing material matrix to be applied to a heat-conducting gasket, aluminum nitride powder is adopted as the matrix, tannic acid is used for modifying the surface of the powder so that the surface of aluminum nitride can be coated with graphene oxide, a layer of graphene spherical shell is formed on the surface of aluminum nitride through high-temperature reduction, and the heat-conducting wave-absorbing material is obtained. And the wave-absorbing material has excellent wave-absorbing performance. According to the invention, tannic acid is used as a surface modifier to prepare the graphene-coated aluminum nitride powder, the use of organic reagents is reduced in the coating process, and the pollution to the environment in the preparation process is reduced; when the material is applied to the heat-conducting wave-absorbing gasket, the gasket can be ensured to have excellent heat conductivity and tensile strength, the Rohs and halogen-free requirements are met, and the environment-friendly heat-conducting gasket is obtained.
本发明公开了一种多层石墨包覆氮化铝陶瓷粉体的制备方法及其应用。该应用为石墨烯包覆氮化铝粉体作为导热吸波材料基体在导热垫片中的应用，采用氮化铝粉料为基体，使用单宁酸对粉体表面进行改性使氧化石墨烯包覆到氮化铝表面，经过高温还原在氮化铝表面形成一层石墨烯球壳，具有优异的吸波性能。本发明通过单宁酸作为表面改性剂制备石墨烯包覆氮化铝粉体，包覆过程减少了有机试剂的使用，减低制备过程中对环境的污染；应用于导热吸波垫片中可以保证垫片具有优异的热导率和拉伸强度，符合Rohs和无卤要求，得到了环境友好型导热垫片。
Preparation method and application of multilayer graphite coated aluminum nitride ceramic powder
The invention discloses a preparation method and application of multi-layer graphite coated aluminum nitride ceramic powder. According to the application, graphene-coated aluminum nitride powder serves as a heat-conducting wave-absorbing material matrix to be applied to a heat-conducting gasket, aluminum nitride powder is adopted as the matrix, tannic acid is used for modifying the surface of the powder so that the surface of aluminum nitride can be coated with graphene oxide, a layer of graphene spherical shell is formed on the surface of aluminum nitride through high-temperature reduction, and the heat-conducting wave-absorbing material is obtained. And the wave-absorbing material has excellent wave-absorbing performance. According to the invention, tannic acid is used as a surface modifier to prepare the graphene-coated aluminum nitride powder, the use of organic reagents is reduced in the coating process, and the pollution to the environment in the preparation process is reduced; when the material is applied to the heat-conducting wave-absorbing gasket, the gasket can be ensured to have excellent heat conductivity and tensile strength, the Rohs and halogen-free requirements are met, and the environment-friendly heat-conducting gasket is obtained.
本发明公开了一种多层石墨包覆氮化铝陶瓷粉体的制备方法及其应用。该应用为石墨烯包覆氮化铝粉体作为导热吸波材料基体在导热垫片中的应用，采用氮化铝粉料为基体，使用单宁酸对粉体表面进行改性使氧化石墨烯包覆到氮化铝表面，经过高温还原在氮化铝表面形成一层石墨烯球壳，具有优异的吸波性能。本发明通过单宁酸作为表面改性剂制备石墨烯包覆氮化铝粉体，包覆过程减少了有机试剂的使用，减低制备过程中对环境的污染；应用于导热吸波垫片中可以保证垫片具有优异的热导率和拉伸强度，符合Rohs和无卤要求，得到了环境友好型导热垫片。
Preparation method and application of multilayer graphite coated aluminum nitride ceramic powder
一种多层石墨包覆氮化铝陶瓷粉体的制备方法及其应用
YANG JUNYOU (author) / LI XIN (author) / ZHANG ZHIHONG (author) / LUO YUBO (author) / LI JUNWEI (author) / TAO YANG (author) / ZOU YUKANG (author)
2024-12-13
Patent
Electronic Resource
Chinese
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