▎ 摘　　要

NOVELTY - Graphene nanoplatelets (GNPs)/YSZ composite ceramic powder comprises GNPs powder and YSZ powder coated with silica sol. USE - The ceramic powder is useful for ceramic material used for electronic components of spacecraft. ADVANTAGE - The ceramic powder: has high temperature resistant metastable tetragonal phase, excellent mechanical property and thermal conductivity; reduces the residual stress caused by temperature gradient when thermal spraying; and exhibits improved coating bonding strength. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: preparing the GNPs/YSZ composite ceramic powder; and using method of the GNPs/YSZ composite ceramic powder, comprising depositing GNPs/YSZ composite ceramic powder on the Kovar alloy, and forming GNPs/YSZ composite ceramic coating without bonding layer on the Kovar alloy.