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Preparation of tetragonal ZrO2-Gd2O3powders

โœ Scribed by S. Bhattacharyya; D. C. Agrawal

Publisher
Springer
Year
1995
Tongue
English
Weight
725 KB
Volume
30
Category
Article
ISSN
0022-2461

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โœฆ Synopsis

ZrO2-Gd203 alloys containing 2, 3, 5 and 8 mol. % Gd203 have been prepared by mixed oxide (MO), hybrid sol-gel (SG), and co-precipitation (CP) routes. No tetragonal (t) phase is retained in the MO method, while 100% t phase is obtained in the calcined CP samples; the SG method leads to only partial stabilization of the t phase. Washing of the CP powders with propan-2-ol leads to unagglomerated powders with increased specific surface area (145 versus 89m2g -1) and sintered density (98% versus 79%). Cubic and t' phase also appear on sintering the samples with > 2 mol. % Gd203.

๐Ÿ“œ SIMILAR VOLUMES

Hot isostatic pressing of tetragonal ZrO
Hot isostatic pressing of tetragonal ZrO2solid-solution powders prepared from acetylacetonates in the system ZrO2-Y2O3-Al2O3
โœ H. Watanabe; K. Hirota; O. Yamaguchi; S. Inamura; H. Miyamoto; N. Shiokawa; K. T ๐Ÿ“‚ Article ๐Ÿ“… 1994 ๐Ÿ› Springer ๐ŸŒ English โš– 814 KB

In compositions having ZrO2/Y203 = (74.25-71.25)/(0.75-3.75) (mol % ratio) with 25 mol % AI203, metastable t-Zr02 solid solutions crystallize at ~ 780 ~ to ~ 860 ~ from amorphous materials prepared by the simultaneous hydrolysis of zirconium, yttrium and aluminium acetylacetonates. Hot isostatic pre