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首页> 外文OA文献 >Influence of Lubricants and Attrition Milling Parameters on the Quality of Zirconolite Ceramics, Consolidated by Hot Isostatic Pressing, for Immobilization of Plutonium
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Influence of Lubricants and Attrition Milling Parameters on the Quality of Zirconolite Ceramics, Consolidated by Hot Isostatic Pressing, for Immobilization of Plutonium

机译：润滑剂和磨损研磨参数对热等静压固结的锆英石陶瓷质量的影响，用于钚的固定化

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摘要

The effect of attrition milling on the processing of precursor oxides was investigated, with reference to the fabrication of titanate ceramics for the immobilization of plutonium and actinides, consolidated by hot isostatic pressing. Difficulties encountered during the lubricant removal step masked any correlation between the milling conditions and the final product. Four lubricants were investigated zinc stearate, Ceridust™, polyethylene glycol and oleic acid. The precursor blends were added to these lubricants to ensure the powders remained free flowing while dry milling in an attrition mill. All except Ceridust™ allowed the milled powders to be freely discharged. Examination of the products showed that each sample was highly porous and all were below the target minimum of 92 % of theoretical density. XRD and SEM analysis showed the production of a multiphase ceramic (zirconolite, perovskite, ilmenite) rather than the single target phase zirconolite. The impact of incomplete lubricant burn out on the oxidation states of Ce and Fe was investigated by XANES and Mössbauer spectroscopy, respectively. Suggested modifications to the HIP processing line, including the addition of an in situ sintered metal filter, the use of fumed metal oxides and the introduction of electrical conductivity in the precursors, are presented. © 2014 The American Ceramic Society.
机译：参考通过热等静压固结的用于固​​定for和act系元素的钛酸盐陶瓷的制备，研究了研磨对前体氧化物加工的影响。在润滑剂去除步骤中遇到的困难掩盖了研磨条件和最终产品之间的任何相关性。研究了四种润滑剂：硬脂酸锌，Ceridust™，聚乙二醇和油酸。将前体共混物添加到这些润滑剂中，以确保粉末在减磨机中干磨时保持自由流动。除Ceridust™外，所有粉末均可自由排出。对产品的检查表明，每个样品都是高度多孔的，并且都低于理论密度的目标最小值92％。 XRD和SEM分析表明，生产的是多相陶瓷（锆石，钙钛矿，钛铁矿），而不是单一目标相的锆石。分别通过XANES和Mössbauer光谱研究了润滑剂不完全燃烧对Ce和Fe氧化态的影响。提出了对HIP生产线的建议修改，包括增加原位烧结金属过滤器，使用热解金属氧化物以及在前体中引入电导率。 ©2014美国陶瓷协会。

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