Surface chemical characterisation of multicomponent titanate powders
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Date
1991-08
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Journal ISSN
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Publisher
Trans Tech Publications
Abstract
Synroc is a multicomponent, multiphase, titanate ceramic designed to immobilise high level waste (HLW) from nuclear reactors [1]. The Synroc concept involves immobilising the elements present in HLW within an assemblage of thermodynamically stable mineral phases (hollandite, zirconolite and perovskite). These minerals are formed during calcination and hot-pressing of a precursor powder containing TiO1, ZrO2, A1203, BaO, and CaO in relative mass abundances of (7O.4to 76.4),(5.5 to 8.5),(3.5 to 5.5),(4.6to 6.6) and (10.1 to 12.1) percent, respectively.
Synroc powders are typically produced by advanced chemical methods involving alkoxide hydrolysis. The detailed chemistry of these methods has been described previously [2,3]. This paper investigates the relationship between surface speciation and powder processing techniques, and examines methods for controlling interfacial chemical processes by selection of processing parameters.
Description
Physical copy held by ANSTO Library at 620.14/9.
Conference name also called "2nd International Ceramic Conference and Exhibition" on preface.
Keywords
Synroc process, Synthetic rocks, Titanates, Ceramics, High-level radioactive wastes, Reactors, Radioactive waste disposal, Hot pressing, Hollandite, Zirconolite, Perovskite, Calcination, Hydrolysis, Chemical properties
Citation
Bartlett, J. R., & Woolfrey, J. L. (1990). Surface chemical characterisation of multicomponent titanate powders. Paper presented to the International Ceramic Conference (AUSTCERAM 90: ceramics technology - sharing the knowledge), Perth, Western Australia, 26-31 August 1990. Key Engineering Materials, 48-50, 679-685.