Theinfluencesofsilicavolumefraction,electrolyteconcentrationandpHvalueuponthestressdependenceofelasticmodulusG′andviscousmodulusG″wereinvestigated.Theresultsshowthatthesuspensiontransformsfromaliquid-likestatetoasolid-likestatewithincreasingthevolumefractionofsilica.Suchasolid-likestatecanbetransformedbackintoaliquid-likestateundertheapplicationofalargerstress.Atthehighervolumefraction,thelargercriticalstressisrequiredtoinducethetransitionfromsolid-liketoliquid-likestate.AstheelectrolyteconcentrationdecreasesorpHvalueincreases,theinter-particleforceincreases,whichcausesthestatetransitiontooccuratahigherstress.
