New corundum abrasive and its preparation method
The invention discloses a new corundum abrasive, and the main crystal phase is Al2O3. The component of its raw material and its weight percentage content are Al2 (SO4) 3 / 18H2O or AlNO3 9H2O 99.15% ~ 99.85% and additives 0.15% ~ 0.85%, and the additives are Ca (NO3) 2, Fe (NO3) 3, (CH3CH2O) 4Ti, Mg 2, 0% ~ 2, 0% ~ H20O4Si, 0 to 8%Sb (CH3COO) 3. Al (OH) 3 solid was prepared by wet chemical method using ammonia as precipitant. After screening, granulation and calcining at 1250 ~ 1400 C, new corundum abrasives were obtained. The shape of abrasive particles is controllable, and its grain size is between 50nm and 3 m. The invention reduces energy consumption, improves the toughness of traditional capacitor corundum, and improves its grinding application effect and processing service life.