▎ 摘　　要

NOVELTY - A multilayered graphene dispersion comprises a multilayered graphene dispersed in a liquid phase containing an organic solvent and a liquefied gas. USE - Multilayered graphene dispersion is used for blackening agent for forming blackening film on surface of thermophysical property-measurement sample, and release agent/lubricant for forming separation layer between sintering mold and sintered component in powder sintering (all claimed). ADVANTAGE - The multilayered graphene dispersion has excellent dispersion stability and re-dispersibility, and is capable of instantaneously producing thin, uniform coating film on the sample surface. The blackening agent containing the multilayered graphene dispersion has excellent blackening effect, and is capable of measuring correctly the heat conductivity of a thin metal sample. The release agent/lubricant containing the multilayered graphene dispersion has excellent release/lubricating effect. The formation of thin and uniform coating film containing multilayered graphene on the contact surface, it is possible to cause the sintered component to be pushed out more smoothly from the sintering mold by reducing the wear of the sintering mold, and the service life of the sintering mold is prolonged. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: (1) blackening agent, which comprises the multilayer graphene dispersion, and is used for forming a blackening film on a surface of a sample for thermophysical property measurement; (2) release agent/lubricant, which comprises the multilayer graphene dispersion. The release agent/lubricant is used for forming separation layer between sintering mold and sintered component in powder sintering; and (3) multilayer graphene dispersion enclosure, which comprises the multilayer graphene dispersion in which the liquefied gas is enclosed in a liquid phase and a gas phase while maintaining a vapor pressure equilibrium, a valve component provided in the enclosed container, and a unit for opening the valve component to inject the multilayer graphene dispersion from the sealed container by pressure of the gas phase.