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Densification Behavior of Single‐Crystal and Polycrystalline Spherical Particles of Zirconia
Author(s) -
Slamovich Elliott B.,
Lange Frederick F.
Publication year - 1990
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.1151-2916.1990.tb06463.x
Subject(s) - crystallite , materials science , cubic zirconia , yttrium , zirconium , single crystal , crystal (programming language) , aqueous solution , particle (ecology) , mineralogy , particle size , chemical engineering , crystallography , ceramic , composite material , metallurgy , chemistry , oxide , oceanography , engineering , computer science , programming language , geology
Micrometer size polydispersed spheres of zirconia were produced via electrostatic atomization and pyrolysis of aqueous zirconium acetate‐yttrium acetate precursors. Varying the precursor composition in the ZrO 2 ‐rich region of the ZrO 2 ‐Y 2 O 3 binary system resulted in the production of either single‐crystal (0 and 10 mol% Y 2 O 3 O or dense polycrystalline (3 mol% Y 2 O 3 ) zirconia spheres of similar size distribution for densification studies. Powders of either the singlecrystal or the polycrystalline particles exhibited contrasting densification behavior; viz., powder compacts composed of polycrystalline particles obtained significantly higher endpoint densities than their single‐crystal counterparts. Microstructural observations showed that while necks between single‐crystal particles reached a stable size, necks between polycrystalline particles continued to grow.