▎ 摘　　要

NOVELTY - A high-temperature in-situ graphene/garnet nanocomposite ceramic material is obtained by mixing graphene oxide suspension and alkali-activated metakaolin powder. The graphene oxide suspension is formed by mixing graphene oxide powder with deionized water in volume ratio of 1-20 mg:1 mL. The alkali-activated metakaolin powder contains alkaline hydroxide and silica sol mixture with mass concentration of 25-45% in molar ratio of 1:0.5-1.5. USE - High-temperature in-situ graphene/garnet nanocomposite ceramic material (claimed). ADVANTAGE - The high-temperature in-situ graphene/garnet nanocomposite ceramic material has excellent graphene dispersibility. DETAILED DESCRIPTION - A high-temperature in-situ graphene/garnet nanocomposite ceramic material is obtained by mixing graphene oxide suspension and alkali-activated metakaolin powder. The graphene oxide suspension is formed by mixing graphene oxide powder with deionized water in volume ratio of 1-20 mg:1 mL. The alkali-activated metakaolin powder contains alkaline hydroxide and silica sol mixture with mass concentration of 25-45% in molar ratio of 1:0.5-1.5. The volume ratio of graphene oxide suspension and alkali-activated metakaolin powder is 1:1.5-2.5. The molar ratio of silicon element and aluminum element in high-temperature in-situ graphene/garnet nanocomposite ceramic material is 1.5-2.5:1. An INDEPENDENT CLAIM is included for preparation of high-temperature in-situ graphene/garnet nanocomposite ceramic material.