High-collapsibility and recoverable silicon oxide-based ceramic core as well as preparation method and application of high-collapsibility and recoverable silicon oxide-based ceramic core

• Main Authors: QIN YI, ZHAO TING, ZHANG PEI, CHENG YANI, ZHU JIANFENG, FANG YUAN
• Format: Patent
• Language: Chinese; English
• Published: 01.03.2022
• Subjects: CASTING; FOUNDRY MOULDING; PERFORMING OPERATIONS; POWDER METALLURGY; TRANSPORTING

The invention provides a high-collapsibility and recoverable silicon oxide-based ceramic core as well as a preparation method and application thereof. The high-collapsibility and recoverable silicon oxide-based ceramic core is prepared from the following raw materials: quartz glass basic powder, water glass, a pore forming agent, an additive and water, the quartz glass base powder is powder obtained by grain composition of nanoscale silicon dioxide and micron-sized silicon dioxide, and the nanoscale silicon dioxide accounts for 10%-75% by mass, and the micron-sized silicon dioxide accounts for 25%-90% by mass; the additive is ceramic powder for inhibiting sintering densification of the quartz glass basic powder; the addition amounts of the water glass, the pore-forming agent, the additive and the water are respectively 1%-8%, 0-15%, 0-40% and 5%-15% of the mass of the quartz glass base powder. The ceramic core is directly preheated and poured without degreasing or dewaxing, is high in collapsibility and can b