Method for coating MgO protecting layer on surfaces of hollow microspheres

• Main Authors: YU SIRONG, XIONG WEI, NIU YAFENG, ZHAO YAN, YIN XIAOLI, LIU LIN, LIU ENYANG
• Format: Patent
• Language: Chinese; English
• Published: 13.08.2019
• Subjects: ALLOYS; CHEMISTRY; FERROUS OR NON-FERROUS ALLOYS; METALLURGY; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention discloses a method for coating a MgO protecting layer on the surfaces of hollow microspheres, aims to overcome the problem of easy breakage of the hollow microspheres in the preparationprocess of hollow microsphere/magnesium alloy multihole composite materials, and belongs to the field of ultrafine powder material surface modification. In the method, the acid washing, the alkali washing, the sorting and the drying are firstly performed on the hollow microspheres; then, the coupling and the coating are performed; and finally, the calcining is performed to obtain the hollow microspheres coated with the MgO protecting layer. The prepared MgO coating layer is uniform and compact, high in bonding strength with the hollow microspheres and not easy to fall; and the hollow microspheres and magnesium alloy melts can be separated in the preparation process of the composite materials to prevent breakage of the hollow microspheres. In addition, the prepared MgO coating layer and themagnesium alloy melts ach