Patent ID: 11866370
Assignee: SINOCERAM TECHNOLOGY (ZHENGZHOU) CO., LTD.
Field: Materials, metallurgy (Chemistry)
Classification: CPC C | IPC C

Claim 4:
5. A method for preparing the grain-grade zirconia toughened alumina ceramic substrate of claim 1, comprising:
(1) adding the alumina powder, the zirconia powder, the magnesia-aluminum spinel powder, the solvent and the dispersant into a ball mill followed by a primary ball milling for 24-48 h; and adding the binder and the plasticizer into the ball mill followed by a secondary ball milling for 48 h to obtain a mixture; and
(2) subjecting the mixture to vacuum degassing to obtain a casting slurry with a viscosity of 20000-24000 mPa s; subjecting the casting slurry to tape casting on a casting machine to obtain a green sheet; cutting the green sheet by a punching die followed by pressureless sintering in a furnace at 1600-1630° C. for 3-6 h to obtain the grain-grade zirconia toughened alumina ceramic substrate.