Best refractory clay, whether used as aggregate or binder of products, must have various corresponding physical properties, the most basic fire resistance, sintering, plasticity and bonding.

Fire resistance refers to the resistance to melting at a certain high temperature. As far as refractory materials are concerned, the melting point of Al2O3 contained in them is very high, so it has corresponding refractoriness. The level of refractory depends on the content of Al2O3. Generally, the refractoriness with high Al2O3 content is high, and vice versa. The level of fire resistance directly affects the technical indicators such as the compressive strength and load softening point of the product at high temperature, and is an important factor in determining the product and its application range.

Sinterability refers to the properties that Best refractory clay can obtain a certain density and strength after calcination. It is an important thermal index used in the process of products to determine the calcination temperature of raw materials and the calcination temperature of products.

Plasticity and bonding are the properties that Best refractory clay can form any shape without breaking under the action of external force, and can still keep the prototype unchanged when the external force is stopped. This property can determine the molding process and the ratio of binder to make each refractory products.