Ceramic Alumina Abrasive performance and test method

Different ceramic alumina abrasive from different manufacturer has slightly different performance, mainly focus on below aspect

From: DOMILL AbrasiveDate: 2020-06-28 03:27:27Views: 2733

Different ceramic alumina abrasive from different manufacturer has slightly different performance, mainly focus on below aspect:

Physical Parameter	Range	Test method/equipment
True density，g/mm3	3.85-3.95	Helium density
Hardness, HV	1600-2200	Micro Viker
Crystalline size，nm	50-500	Scanning Electron Microscope
Ball mill toughness,%	35-85	Ball mill and particle distribution

These parameters will directly affect the grinding performance of Ceramic Alumina Abrasive. Please refer to below table:

Item	Mechanism	Effect to the grinding process
True density	Low true density means high porosity within abrasive grains.	Less than 3.85g/mm3 for ceramic alumina abrasive means grains are easy to be broken and lower durability due to porosity
Hardness	Means the ability of grains to resist deformation at the force	More than twice as workpiece hardness is enough
Crystalline size	The size of the tiny cell to build abrasive grain	Bigger crystalline size, more strength of grain, more durability and less sharpness. Smaller crystalline size, more sharpness, less durability and less strength of grain.
Ball mill toughness	Toughness means the ability of grains to resist the impact force	45-70% is a reasonable range, less than this means easy to be fractured. Bigger than this means too strong and less sharpness.

For abrasive grains, 3 key characters are hardness, toughness, and sharpness. Below is a map of different materials.

When design a grinding tool, it’s needed to consider the character of different abrasive grains to achieve better performance.

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