Abstract: The invention discloses a graphene composite film modified by single crystal sapphire whiskers as well as a preparation method and application thereof. The graphene composite film provided by the invention comprises graphene and single crystal sapphire whiskers, the single crystal sapphire whiskers and the graphene are dispersed in the graphene composite film, and the content by weight of the graphene is greater than that of the single crystal sapphire whiskers. The graphene composite film can be used to prepare an electrode and applied to lithium ion batteries and capacitors. The graphene composite film has excellent toughness, structural stability and folding resistance as well as excellent electroconductivity and thermoconductivity; and the preparation method thereof is good in reproducibility and low in cost.

Abstract: A ceramic-based toughness-enhanced material includes the following starting materials by volume percentage: 92-96% ceramic substrate powder, 2-4% single crystal sapphire fiber, 0.3-0.4% ceramic substrate disperser, 0.6-0.7% single crystal sapphire fiber disperser and 3-5% sintering aid.

Abstract: A interply hybrid composite based single crystal alpha-aluminium oxide fiber includes single crystal alpha-aluminium oxide fiber, glass fiber and a resin compatibilizer; a hybrid ratio of the single crystal alpha-aluminium oxide fiber to the glass fiber is 1:40 to 3:53.