Patent ID: 8292998

Claim:
A parting agent for preparing a layer on a ceramic surface of a casting tool wherein the parting agent is formed of: deionized water; an amount of sodium hydroxide and/or potassium hydroxide and/or aluminum chloride, a phosphate-containing binder comprising monoaluminum phosphate and/or monozinc phosphate and/or monomagnesium phosphate and/or monosodium phosphate and/or monomanganese phosphate and/or boron phosphate, an amount of structural parts comprising Al 2 O 3 and/or SiO 2 having a grain size of 80 nm to 200 nm, and an amount of primary parts comprising Al 2 O 3 , SiO, ZnO, TiO 2 , ZrO 2 , and CeO having a grain size of 2 nm to 80 nm, and an amount of an organic and/or inorganic dispersant.