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Preparation, Sintering, and Properties of Translucent Er 2 O 3 ‐Doped Tetragonal Zirconia
Author(s) -
Durán Pedro,
Recio Paloma,
Jurado José R.,
Pascual Carmen,
Moure Carlos
Publication year - 1989
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1989.tb06036.x
Subject(s) - sintering , materials science , tetragonal crystal system , compaction , cubic zirconia , calcination , doping , isothermal process , activation energy , grain boundary , chemical engineering , precipitation , grain boundary diffusion coefficient , mineralogy , ceramic , metallurgy , composite material , microstructure , crystallography , crystal structure , chemistry , thermodynamics , biochemistry , physics , optoelectronics , meteorology , engineering , catalysis
Tetragonal zirconia doped with 3 mol% Er 2 O 3 was prepared by the gel‐precipitation wet‐chemical method. The compaction response of ultrafine (∼8.5 nm), calcined, deagglomerated powders was studied. Initial sintering was studied using both isothermal and nonisothermal techniques, and an activation energy of 270 ± 40 kJ/mol was obtained; therefore, grain‐boundary diffusion was probably the predominant mechanism in the sintering stage. The microstructural development in the high‐temperature‐aged, sintered samples and its effect on density and mechanical properties were also studied. A theoretically dense body of tetragonal zirconia solid solution of 3 mol% Er 2 O 3 –ZrO 2 , obtained from sintering below 1400°C, was translucent.