Alumina ceramics are often seen in our daily life, and its appearance brings us great convenience. So how can you choose the right adhesive for you? Next, let's give you a brief introduction to the relevant knowledge points.

Adhesives on the market can be divided into lubricants, plasticizers, dispersants, surfactants and so on. To meet molding needs, a combination of various organic materials is usually used. When choosing alumina ceramic binder, it is required that it can be wetted by powder. Only when the critical surface tension or surface free energy of powder is greater than the surface tension of binder, can it be wetted well. Secondly, a good binder is easy to be fully wetted by powder and has strong adhesion. When the binder is moistened by the powder, the attraction between the molecules will be generated, and the binder and powder will bond once. At the same time, cohesion occurs in the adhesive molecules as a result of orientation, induction and dispersion.

Although water can fully moisten the powder, it is not a good binder for alumina ceramics because of its high volatility, small molecular weight and small bonding force. In addition, the molecular weight of the adhesive used in alumina ceramics should be moderate, with the increase of molecular weight, Surian binding ability will be enhanced. But when the molecular weight is too large, the cohesion is too large, it is not easy to wet, and the billet body is easy to deformation. In order to help the movement of the chain segments of the molecule, a plasticizer should be properly added at this time to make the adhesive more soft and easier to shape while it is easy to get wet. In addition, in order to ensure the quality of alumina ceramics, it is necessary to prevent the inclusion of impurities in the binder, raw materials and preparation process, resulting in harmful defects in the product. Therefore, it is necessary to choose organic materials that are easy to disperse and remove and do not contain harmful inorganic salts and metal ions to ensure product quality.