| abstract |
The invention discloses a ceramic corundum abrasive and a preparation method thereof. The material is prepared by using pseudo-boehmite as the raw material to prepare the precursor, adding composite additives and crystal seed α-Al 2 O 3 , and then performing ball milling, drying, crushing, grading and sintering; the composite additives include: La 2 O 3 , TiO 2 , SiO 2 , ZrO 2 , Y 2 O 3 , CaO. The prepared ceramic corundum abrasive has the morphology of polygonal hexagonal three-dimensional equiaxed grains, the average grain size is between 300 and 950 nm, the microhardness is between 20 and 23.5 GPa, and the density is between 3.90 and 3.98 g/cm. between 3 . It can be used in heavy-duty and wear-resistant areas such as precision grinding. |