Sintering Properties Of Kaolin

Sintering performance refers to the ability of the formed solid powdery kaolin body to spontaneously fill the particle gaps and densify when heated to a temperature close to its melting point (generally exceeding 1000 ℃). The state where the porosity decreases to the lowest value and the density reaches the maximum value is called the sintering state, and the corresponding temperature is called the sintering temperature. When heating continues, the liquid phase in the sample continues to increase, and the sample begins to deform. At this point, the temperature is called the conversion temperature. The interval between sintering temperature and conversion temperature is called the sintering range. The sintering temperature and sintering range are important parameters in determining the billet formula and selecting the type of kiln in the ceramic industry. It is advisable to use a low sintering temperature and a wide sintering range (100-150 ℃) for the test material. In terms of process, the sintering temperature and sintering range can be controlled by adding melting aids and blending different types of kaolin in proportion.