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Al2O3-Doped TiO2 Ceramic Waste Forms Produced by Melting Method

Published online by Cambridge University Press:  10 February 2011

Masayoshi Uno,
Hajime Kinoshita and
Shinsuke Yamanaka
Masayoshi Uno
Affiliation:
Department of Nuclear Engineering, Osaka University, Yamada-oka 2-1, Suita, Osaka 565-0871 JAPAN
Hajime Kinoshita
Affiliation:
Department of Nuclear Engineering, Osaka University, Yamada-oka 2-1, Suita, Osaka 565-0871 JAPAN
Shinsuke Yamanaka
Affiliation:
Department of Nuclear Engineering, Osaka University, Yamada-oka 2-1, Suita, Osaka 565-0871 JAPAN
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Abstract

We studied the phase stability and melting temperature of alumina-doped alkaline earth and rare earth -Ti-O system with the composition variation. Melting of the mixture of Nd2O3, CeO2, SrO, TiO2 and A12O3 at 1673 K in 1 hour produced RE2Ti3O9 phase, and the chemical formula of the oxide was assumed to be (Ce,Nd,Sr)2(Ti,Al)3O9. A Differential Scanning Calorimetry (DSC) measurement showed that the melting temperature of this compound was 1646 K. Al and Sr was considered to contribute to the reduced melting temperature of the oxides in the system. The hardness comparing with ceramic wastes and the leach rate superior to glass waste forms were confirmed

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