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对文题研究表明:氧化铝微粉浓悬浮液属于非聚集性微粉浓悬浮液的胀性流体,随氧化铝微粉浓度增加,临界剪切速率γc向低剪切速率方向移动,由于假凝出现剪切中断现象。据该微粉浓悬浮液具有的正负双触变环,表明系统既具有触变性又具有粘弹性。小振幅振荡剪切实验证明,系统粘弹性随浓度增加而增强。借助分子运动论解释了贮能模量G′和耗能模量G″与频率ω的关系。
The research on the paper shows that the suspension of alumina micropowder belongs to the expanding fluid of non-aggregated micropowder suspension. As the concentration of alumina micropowder increases, the critical shear rate γc moves to low shear rate. Cut off the phenomenon. According to the micropowder suspension with positive and negative double thixotropic ring, indicating that the system has both thixotropic and viscoelastic. Small amplitude oscillation shear experiments show that the system viscoelasticity increases with increasing concentration. The relationship between storage modulus G ’and dissipation modulus G "and frequency ω is explained by means of molecular kinematics.