Fluidity And Yield of Enamel Slurry
The fluidity and yield of enamel enamel slurry are two important properties, both of which have an important influence on the uniformity of enamel coating. Fluidity refers to the performance of whether the enamel frit can be evenly coated on the metal body. Different coating methods such as dipping, electrophoresis, and spraying have different requirements on the fluidity of the enamel frit.
Yield refers to the ability of the enamel slurry to resist external force (gravity, vibration during transmission) without rheology after enamelling. The clay suspension is a non-Newtonian fluid, and the enamel slurry is a plastic fluid. A characteristic of plastic flow is that the applied shear force must exceed a certain minimum value (ie, the yield value) before flow begins. The yield value of enamel enamel slurry has a certain relationship with the thixotropy and consistency of the enamel slurry.
When enamel manufacturers choose high-quality clay or increase the amount of clay, choose the type of retention agent and the optimal value of the amount of retention agent, the yield value of the enamel slurry can be improved. Increasing the grinding amount of water will increase the fluidity of the enamel slurry and reduce the yield value.
The rheology of enamel slurry directly affects the quality of the porcelain surface of enamel products. No matter what kind of process drawing is adopted, the technological properties of the enamel frit must be optimized, and the rheology and yield value of the enamel frit must be controlled within an optimal range.