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首页> 外文期刊>Revista de Chimie >Obtaining of Hydrotalcite-based Ceramic Monoliths through ExtrusionThe investigation of the effect of additives on the rheological behaviour of the ceramic pastes
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Obtaining of Hydrotalcite-based Ceramic Monoliths through ExtrusionThe investigation of the effect of additives on the rheological behaviour of the ceramic pastes

机译：通过挤压获得水滑石基陶瓷整体材料添加剂对陶瓷浆料流变行为的影响研究

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摘要

In this paper are presented the results of experimental research regarding the behaoiour of ceramic pastes based on microcrystalline hydrotalcite [M_(1-x)~(II)M_x~(III) (OH)2]_(x+)A_(n-x)mH2O, used for the preparation of monoliths with circular section through extrusion. The experimental studies regarding the rheological behaviour of hydrotalcite pastes lubricated with stearin shows that these materials have viscoplastic behaviour. Two rheological models are proposed (Bingham-Schwedoff and Herschel-Bulkley) for the correlation of experimental data and for the determination of rheological parameters (n and k). It is shown that Herschel-Bulkley model is more appropriate than Bingham-Schwedoff model to describe these ceramic mixtures and that stearin has a lubricating role, improving the flowing parameters. By using the bifactorial analysis of variance it was also investigated, from the statistical point of view, the influence of the studied factors (the content of the plasticizer agent and the shear rate γ).
机译：本文介绍了有关基于微晶水滑石[M_（1-x）〜（II）M_x〜（III）（OH）2] _（x +）A_（nx / n mH2O，用于通过挤出制备具有圆形截面的整料。关于用硬脂精润滑的水滑石浆料的流变行为的实验研究表明，这些材料具有粘塑性行为。提出了两种流变模型（Bingham-Schwedoff和Herschel-Bulkley）来关联实验数据和确定流变参数（n和k）。结果表明，Herschel-Bulkley模型比Bingham-Schwedoff模型更适合描述这些陶瓷混合物，并且硬脂精具有润滑作用，改善了流动参数。通过使用方差的双因素分析，还从统计学的角度研究了所研究因素（增塑剂的含量和剪切速率γ）的影响。

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