① Hydration combination
By means of the hydration reaction between the binder and water at room temperature, hydration products are generated to produce a binding effect. Various types of cement are combined through hydration mechanism to produce strength in the material.
② Chemical combination
By means of a chemical reaction between a binder and a coagulant, or between a binder and refractory material at room temperature, or when heated, a chemical reaction occurs to generate a compound with binding properties, resulting in binding. When sodium (water glass) binder is added with fluoride sodium coagulant, a reaction occurs to generate an aqueous solution SiO2: nH2O, which is dehydrated to form a network like structure of siloxane (Si-O-Si), thereby producing a strong binding effect.
③ Condensation combination
By adding catalysts or crosslinking agents, the binder undergoes condensation to form a network like structure, resulting in bonding strength. Under heating conditions, linear aldehyde resin and tetraamine undergo crosslinking reaction to produce condensation bonding.
④ Ceramic bonding (sintering bonding)
Adding additives or metals that can lower the sintering temperature to refractory materials can greatly reduce the temperature at which the liquid phase appears, promote solid-liquid reactions at low temperatures, and produce low - and medium temperature sintering bonds.
⑤ Adhesive bonding
By means of one or a combination of the following physical actions, binding occurs: firstly, adsorption, including physical adsorption and chemical adsorption, relies on intermolecular interactions such as van der Waals forces to produce binding; The second is diffusion, which refers to the mutual diffusion between the binding agent and the bound molecules under the action of thermal motion of material molecules, forming a diffusion layer at the interface and thus forming a strong bond; The third is electrostatic interaction, which means that there is a double layer at the interface between the binder and the bonded object, and the bonding is generated by the electrostatic attraction of the double layer.
⑥ Cohesive combination
By adding coagulants, particles (colloidal particles) can coagulate and form bonds
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