Two-step synthesis of zirconolite-rich ceramic waste matrice and its physicochemical properties
Two-step synthesis of zirconolite-rich ceramic waste matrice and its physicochemical properties
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富锆石陶瓷废基体的两步合成及其理化性能
DOI：
10.1111/ijac.12760
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发表时间：
2018
影响因子：
2.1
通讯作者：
Zhang Haibin
中科院分区：
文献类型：
--
作者：
Zhang Kuibao;Yin Dan;Han Peiwen;Zhang Haibin
在这项研究中，采用燃烧合成（CS）加酸处理的两步法合成单相锆英石粉末。以CuO和Ti为氧化剂和还原剂，通过燃烧反应制备了锆英石/Cu复合材料。在酸洗和干燥之后，获得具有双峰粒度分布的精制的富含锆英石的陶瓷粉末。最后将陶瓷粉末预成型并在1050 - 1300°C下煅烧6 - 48小时，这导致在1100°C下烧结18小时后的体积密度和维氏硬度为4.02 g/cm 3和11.54 GPa。根据MCC-I标准评估煅烧的废物基质的水性耐久性。Ca、Ti和Zr的42天标准化浸出率分别为3.96 × 10−3、4.52 × 10− 6和1.54 × 10− 6 g·m−2·d−1。
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/cm3and 11.54 GPa 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 × 10−6and 1.54 × 10−6g·m−2·d−1.