Dispersants in the ceramics industry are chemicals that disperse fine-grained substances in water or organic media and form stable dispersion suspensions. In fact, the definition of superplasticizer refers to the surfactant that can be adsorbed on the surface of cement particles and has a dispersion effect on cement particles, and in the refractory industry, the dispersed fine particles or microparticles are not only cement, and the dispersion medium is not just water medium, so I think it is more appropriate to call chemicals with dispersion function dispersants.
Due to the different amorphous products and even similar products in the refractory industry, the dispersion performance of dispersants varies greatly due to the different grades, grades, proportions and binders, and both inorganic dispersants and organic dispersants have their own advantages and disadvantages.
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The traditional inorganic dispersant has a very limited dispersion effect, and the dosage is large, which causes pollution to the environment, makes the water eutrophication, and is not in line with sustainable development, but it is better to be cheap and the raw materials are easy to obtain.
Naphthalene and melamine dispersants, their water reduction performance needs to be further improved, and because the raw materials contain formaldehyde, which is volatile toxic substances, the production process is not well controlled, which will cause greater pollution to the environment.
In recent years, with the continuous improvement of the requirements for the structural properties of refractory amorphous products, polycarboxylic acid dispersants are being widely used due to their strong dispersion and designability of molecular structure, and their environmental friendliness. However, in the actual use of polycarboxylic acid dispersants, there are also problems of incompatibility with certain materials, such as metal aluminum powder, micro powder made by some special processes, and non-cement binders.
In short, with the deepening of the research on polymer dispersants, in order to meet the needs of formulating high-performance materials, organic polymer dispersants such as green and environmentally friendly polycarboxylic acid will gradually replace other types of dispersants.