Coating for reducing carburization of graphite crucible and preparation method thereof

The invention discloses a coating for reducing carburization of a graphite crucible and a preparation method thereof.The preparation method comprises the following steps that S1, high-purity aluminum oxide serves as a coating material, high-purity calcium aluminate serves as a binding agent, and the coating material and the binding agent are mixed to prepare slurry; s2, spraying the slurry prepared in the step S1 onto the inner surface of an unfired graphite crucible; and S3, drying at normal temperature, and calcining the crucible at high temperature to prepare the graphite crucible with the lining containing the coating. The coating material and the adhesive are mixed to prepare the slurry, and the slurry is coated on the inner surface of the graphite crucible, so that the service life of the graphite crucible is prolonged, the carburizing rate of the graphite crucible is slowed down, and the product quality is improved. 本发明公开了一种降低石墨坩埚渗碳的涂层及其制备方法，制备方法包括以下步骤：S1、将高纯氧化铝作为涂层料，高纯铝酸钙作为粘结剂，混和后制成浆料；S2、将步骤S1中制成的浆料喷涂