(1) abrasive should have a high hardness

(2) The abrasive must have a certain toughness

Toughness refers to the ability of abrasive particles to resist cracking under force or impact. Appropriate toughness can ensure the cutting effect of the abrasive micro-edge, and after passivation can produce a new cutting micro-edge on the fracture surface to continue to maintain its sharp state. If the abrasive is brittle, it will be damaged before it can fully play the cutting role. The toughness of the abrasive is largely determined by its crystalline state (including cracks, pores and other defects in the crystallization), the size of the crystal, the macro geometry of the abrasive and the granulation method. For example, in the composition of brown corundum abrasive, with the increase of TiO2 content, the aggregate will increase correspondingly, while the single crystal and tight combination will decrease correspondingly. Due to the high content of glass (amorphous) in the aggregate, the toughness of brown corundum is reduced. The shape of the particle also affects its toughness. The toughness of uniform volume formed abrasives is higher than that of flake or needle-shaped abrasives.

(3) The abrasive particles should have a certain mechanical strength

(4) abrasive should have thermal stability (red hardness)

Due to the high temperature of the grinding zone (400 to 1000 degree C), it is required that the abrasive particles can still have the necessary physical and mechanical properties at high temperatures to continue to maintain their sharp cutting edge.

(5) The abrasive particles should be thermally stable

(6) abrasive should have a good granulation process