Carbon-carbon preforms are created by needling carbon cloth and web with reverse-hook needles, forming a quasi-three-dimensional network structure with specific strength and shape. These serve as precursors for manufacturing carbon-carbon composite thermal field components, such as crucibles, guide tubes, and insulation cylinder preforms.

Applications: Primarily used in carbon-carbon composite thermal field systems for photovoltaic monocrystalline silicon pulling furnaces.

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