Castable is a kind of thermal insulation material, its main components are main components, additional components and impurities. The so-called additive, to put it bluntly, is an additive. Its use can enhance some aspects of the characteristics of the product, help improve the composition and structure of the product itself, and improve the use effect of the improved product. Admixtures are also a kind of substance often added in the product configuration, and there are many kinds of admixtures. Let's talk about the eight commonly used admixtures.
1.Stabilizer
Some components ofcastable have the destructive effect of expansion due to the formation of new compounds or crystal transformation in the process of production and use. In order to prevent or reduce this destructive effect, a small amount of stabilizer should be added, such as adding a small amount of calcium oxide as stabilizer in the production of zirconia products.
2.accelerator
accelerator refers to a small amount of additives that can promote the setting and hardening of the binder in castable. For example, a small amount of sodium fluosilicate (na5sf2) is added in the production of unburned brick with sodium silicate as binder, and a small amount of alkaline oxide is added in the production of neutral material with phosphoric acid as binder.
3.inhibitor
inhibitor refers to a small amount of substances added to inhibit some physical and chemical reactions in the production of the product. For example, a small amount of oxalic acid is added to inhibit the rapid formation and premature hardening of some phosphates. In addition, a small amount of MgSO is added to prevent the abnormal growth of corundum crystal at high temperature.
4.plasticizer
plasticizer is a kind of material that can improve the plasticity of clay. The plasticizing effect of plasticizer is related to the particle size of dispersed phase, surface tension and polarization characteristics of dispersed medium. Plasticizers commonly used in amorphous materials include bentonite, polyvinyl alcohol, carboxymethyl cellulose, dextrin, starch, etc.
