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Two‐step synthesis of zirconolite‐rich ceramic waste matrice and its physicochemical properties
Author(s) -
Zhang Kuibao,
Yin Dan,
Han Peiwen,
Zhang Haibin
Publication year - 2017
Publication title -
international journal of applied ceramic technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.4
H-Index - 57
eISSN - 1744-7402
pISSN - 1546-542X
DOI - 10.1111/ijac.12760
Subject(s) - zirconolite , materials science , ceramic , calcination , leaching (pedology) , sintering , composite number , nuclear chemistry , particle size , metallurgy , chemical engineering , composite material , phase (matter) , catalysis , organic chemistry , chemistry , pyrochlore , environmental science , soil science , engineering , soil water
In this study, the synthesis of single‐phase zirconolite powder was explored using two‐step route of combustion synthesis ( CS ) plus acid treatment. Zirconolite/Cu composite was firstly produced from the combustion reaction using CuO and Ti as the oxidant and reductant. After pickling and desiccation, refined zirconolite‐rich ceramic powder was obtained with bimodal particle size distribution. The ceramic powder was finally preformed and calcined at 1050‐1300°C for 6‐48 hours, which resulted in bulk density and Vickers hardness of 4.02 g/cm 3 and 11.54 GP a after sintering at 1100°C for 18 hours. Aqueous durability of the calcined waste matrice was evaluated according to MCC ‐1 standard. The 42 days normalized leaching rates of Ca, Ti and Zr were measured to be 3.96 × 10 −3 , 4.52 × 10 −6 and 1.54 × 10 −6 g·m −2 ·d −1 .