含镁离子电解质对氧化铝浆料流变性能的影响

Effects of magnesium electrolyte on rheological properties of alumina slurry

通过高纯氧化铝陶瓷浆料粘度和zeta(ζ)电位等参数的考察,探讨了不同pH值下,含镁离子电解质对其流变性能的影响。结果表明,镁离子会降低氧化铝浆料的流变性能。在其存在下,无分散剂时与添加聚丙烯酸(PAA)作分散剂时,pH值分别为6.5和9.5的浆料具有良好的流变性能。无镁离子存在时,PAA的最佳添加量为0.5%;镁离子浓度为0.05mol/L时,该量增加至0.9%。

Effects of magnesium electrolyte on the rheological properties of ultra-pure alumina slurries at different pH values were investigated by examining the viscosity and zeta（ζ） potential.The results showed that the introduction of magnesium ions reduced the rheological properties of alumina slurries.Under the condition of existence of magnesium ions,favorable rheological properties of alumina slurry without adding dispersants was obtained at pH=6.5.When added PAA,the slurry with better rheological properties was prepared at pH=9.5.The best adding amount of PAA increased as magnesium ions were introduced.When no magnesium ion and 0.05mol/L magnesium ions were introduced,the best adding amount of PAA in the slurries were 0.5% and 0.9% respectively.