Preparation and sinterability of zirconia-toughened-alumina composite powder

Chii Shyang Hwang; Wen Haur Lin

Preparation and sinterability of zirconia-toughened-alumina composite powder

Chii Shyang Hwang, Wen Haur Lin

Research output: Contribution to journal › Article › peer-review

Abstract

To improve the properties of zirconia-toughened-alumina(ZTA) ceramics, a technique which involves hydrolysis of Zr(OC₃H₇)₄ in an Al₂O₃ slurry to form an Al₂O₃ powder with uniformly distributed ZrO₂ is described. The addition of TiO₂ 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 2hr. It is shown that the presence of TiO₂ promotes the grain growth of Al₂O₃ and ZrO₂, and contributes to the retention of tetragonal-ZrO₂ in the sintered ZTA body.

Original language	English
Pages (from-to)	261-264
Number of pages	4
Journal	Journal of the Ceramic Society of Japan. International ed.
Volume	99
Issue number	4
Publication status	Published - 1991 Apr 1

All Science Journal Classification (ASJC) codes

General Engineering

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abstract = "To improve the properties of zirconia-toughened-alumina(ZTA) ceramics, a technique which involves hydrolysis of Zr(OC3H7)4 in an Al2O3 slurry to form an Al2O3 powder with uniformly distributed ZrO2 is described. The addition of TiO2 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 2hr. It is shown that the presence of TiO2 promotes the grain growth of Al2O3 and ZrO2, and contributes to the retention of tetragonal-ZrO2 in the sintered ZTA body.",

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N2 - To improve the properties of zirconia-toughened-alumina(ZTA) ceramics, a technique which involves hydrolysis of Zr(OC3H7)4 in an Al2O3 slurry to form an Al2O3 powder with uniformly distributed ZrO2 is described. The addition of TiO2 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 2hr. It is shown that the presence of TiO2 promotes the grain growth of Al2O3 and ZrO2, and contributes to the retention of tetragonal-ZrO2 in the sintered ZTA body.

AB - To improve the properties of zirconia-toughened-alumina(ZTA) ceramics, a technique which involves hydrolysis of Zr(OC3H7)4 in an Al2O3 slurry to form an Al2O3 powder with uniformly distributed ZrO2 is described. The addition of TiO2 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 2hr. It is shown that the presence of TiO2 promotes the grain growth of Al2O3 and ZrO2, and contributes to the retention of tetragonal-ZrO2 in the sintered ZTA body.

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Preparation and sinterability of zirconia-toughened-alumina composite powder

Abstract

All Science Journal Classification (ASJC) codes

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