Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7888462 | Ceramics International | 2018 | 9 Pages |
Abstract
Samples of thorium-bearing ceramic with a target composition (wt%) 5 Al2O3, 10 CaO, 55 TiO2, 10 MnO, 5 Fe2O3, 5 ZrO2, 10 ThO2 were produced by melting in glassy carbon crucibles in a resistive furnace and by cold crucible inductive melting (CCIM) at a vibration power of 10Â kW and operation frequency of 5.28Â MHz. All the samples contained 85-95Â vol% murataite polytypes with 5- (5C), 8- (8C), and 3-fold (3C) elementary fluorite unit cell composing core, intermediate zone and rim of the grains, respectively, and minor crichtonite, perovskite, pyrochlore, rutile, etc. A feature of the ceramics obtained by melting in glassy carbon crucibles is formation of Fe (II) titanate whereas the inductive-melted ceramics contained traces of vitreous phase due to melt contamination with a cold crucible putty material. Melting rate in the cold crucible of up to 350Â kg/(m2 Ã h) has been achieved. The ceramics obtained have excellent chemical durability.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
S.V. Stefanovsky, A.G. Ptashkin, O.I. Stefanovsky, S.V. Yudintsev, B.S. Nikonov,