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Fabrication of Transparent Yttria Ceramics at Low Temperature Using Carbonate‐Derived Powder
Author(s) -
Saito Noriko,
Matsuda Shinichi,
Ikegami Takayasu
Publication year - 1998
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.1151-2916.1998.tb02583.x
Subject(s) - materials science , yttria stabilized zirconia , sintering , calcination , microstructure , crystallite , yttrium , ceramic , fabrication , chemical engineering , carbonate , mineralogy , precipitation , metallurgy , oxide , cubic zirconia , medicine , biochemistry , chemistry , alternative medicine , physics , pathology , meteorology , engineering , catalysis
A new preparation method for a highly sinterable yttria powder has been developed, the resultant powder characterized, and its sinterability studied. As a precursor of the yttria powder, a fine and needle‐shaped yttrium carbonate was prepared by a precipitation and aging method. A fine and low‐agglomeration yttria powder was obtained by calcining the carbonate precursor at 1100°C. The primary crystallites measured ∼0.1 μm and weakly agglomerated to a size of ∼0.3 μm. The powder had a very high sinterability, so that the powder compact could be sintered to transparency by normal sintering under vacuum without additives at low temperatures, over 1600°C. The sintered transparent ceramics exhibited a homogeneous microstructure with no abnormal grain growth.