The effect of a complex additive based on oxyethylidenediphosphonic acid, soda, and liquid glass on the viscosity and thixotropy of a Stephan Schmidt clay suspension is studied. The full factorial experiment method is used to obtain regression equations describing the dependence of the structural-mechanical properties of the suspension on the composition and quantity of the complex additive. The compositions of the thinning agent which give the lowest possible viscosity and thixotropy are recommended.
The composition of a complex deflocculent for ceramic slip based on oxyethylidenediphosphonic acid (OEDPA) and components of a conventional thinner containing liquid glass and soda is found by trial and error. A comparative study is performed of the effect of the proposed deflocculent and the deflocculent Reotan SL (Lamberti Co.) on the rheological properties of the ceramic slip modified by them and the physical-mechanical properties of the castings. The deflocculent containing OEDPA makes it possible to minimize the slip thixotropy for which the casting rate of the samples, characterized by higher shrinkage and characteristics, remains high.
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