The rheological properties of xanthan gum (XG) and hydrotalcite-like compounds (HTlc for short)/XG mixed suspension, such as fluid type and thixotropy, have been investigated. Especially, we focus on the effect of concentration of XG and mass ratio of HTlc to XG. Herschel-Bulkley fluid model was used to analysis the obtained data. When XG concentration was in the range of 0.05～0.20 wt%, the systems changed from pseudoplastic fluid to plastic one, and no thixotropy. 1.5 wt% pure HTlc suspension belongs to Newtonian fluid type, still no thixotropy. When changing mass ratio of m_HTlc/m_XG from 29.0 to 6.5 (the solid content of mixed HTlc/XG systems fixed as 1.50%), the mixed suspension, all behaved as pseudoplastic fluid type and show positive thixotropic property, except system at mass ratio of 29.0.

Key words: xanthan gum, hydrotalcite-like compound, fluid type, thixotropy