Abstract
To improve the properties of zirconia-toughened-alumina (ZTA) ceramics, a technique which involves hydrolysis of Zr(OC 3 H 7 ) 4 in an Al 2 O 3 slurry to form an Al 2 O 3 powder with uniformly distributed ZrO 2 is described. The addition of TiO 2 within its solubility limit in ZTA enhanced the sinterability of the ZTA powder. A relative density of 98% for ZTA bodies can be obtained by firing at 1500°C for 2 h. It is shown that the presence of TiO 2 promotes the grain growth of Al 2 O 3 and ZrO 2 , and contributes to the retention of tetragonal-ZrO 2 in the sintered ZTA body
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