中性水基氧化铝陶瓷料浆的流变学研究

仝建峰; 陈大明

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航空材料学报 ›› 2002, Vol. 22 ›› Issue (1) : 54-57.

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论文

中性水基氧化铝陶瓷料浆的流变学研究

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Rheological behavior of Al₂O₃ aqueous neutral suspensions

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摘要

采用流变学的方法在RV20型流变仪上研究了不同条件对中性氧化铝悬浮体流变性的影响.重点研究了固含量、分散剂加入量、球磨工艺对料浆流变性的影响.研究表明:随临界固含量的降低,“剪切增厚”的临界剪切速率呈明显的升高趋势,从固含量为56vol%时的82s-1增加到固含量为50vol%时的192s-1;分散剂的加入量对料浆的临界剪切速率具有显著的影响,当固含量为56vol%时,分散剂合适的量为1.0wt%;随着球磨时间的延长,料浆的“剪切增厚”临界剪切速率增大,而且逐渐不再有“剪切变稀”阶段.

Abstract

The rhological properties of Al2O3 water suspensions was examined by means of RV-20 rheometer with rheological method The effects of the solid loading,contents of dispersant and milling time on the rhological properties were studied chiefly The research showed:As the solid loading of the suspension increased,the critical shear rate of the "shear thickening" went down from 192 S-1 to 82 S-1 The dispersant content remarkably affects the suspension's critical shear rate of the "shear thickening" The critical shear rate is higher when the content is 1.0wt% So it can be taken as the appropriate contents of dispersant to the suspension with the solid loading of 56vol% Furthermore,the critical shear rate of the "shear thickening" of the alumina suspension increases with the ball milling time,also the stage of "shear thinning" disappears in long time ball milling.

导出引用

仝建峰, 陈大明. 中性水基氧化铝陶瓷料浆的流变学研究[J]. 航空材料学报, 2002, 22(1): 54-57

TONG jian-feng, CHEN daming. Rheological behavior of Al₂O₃ aqueous neutral suspensions[J]. Journal of Aeronautical Materials, 2002, 22(1): 54-57

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