| abstract |
The invention discloses a kind of by modified ceramic fiber, basalt fibre, mullite fiber, silica, zirconium oxide, magnesia, paraffin and terpene resin according to 100：5‑10：1‑5：200‑300：50‑60：20‑50：150‑300：100 200 weight ratio is mixed, heating stirring obtains slurry；The slurry is injected in ceramic core mold and carries out pressure injection, high-temperature roasting is then carried out and ceramic core idiosome is made；Finally, drying after the ceramic core idiosome being immersed in silicon sol solution；The raw material of the rare-earth oxide modified ceramic core is simple and abundance, the ceramic core have excellent tensile strength. |