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Ceramic Abrasives


Produced by sol-gel method

1.Characters of CA made by sol-gel method:

CA, produced by sol-gel method, is a kind of sintered abrasive grains. Its crystal dimension is very small, which is only 100--500nm, and it is only less one-percent of common corundum crystal size. One grain of grit 46 contains billions of crystal grains. When grinding, the grains of traditional electrical fused alumina become flat and deactivation and easily come off from abrasive tools under the action of grinding force. Its service life is short. However, for CA made by sol-gel method, the entire grinding process is also the self-sharpening process of the grains. During its service life, the new sharp grinding edge exposes constantly when passivating fine crystal grains come off from the grinding tools under the action of grinding force, which makes the grains always in sharp status. So, the abrasive tools made by CA have long service life, good self-sharpening performance, high cutting efficiency, as well as not burning workpieces.

Due to its different microstructure, CA produced by sol-gel method shows difference on abrasive grains fracture behavior. CA shows fracture damage along crystal, while traditional electrical fused alumina shows transgranular fracture damage. Therefore, the toughness of CA is twice than that of the common fused alumina.

CA produced by sol-gel method has similar chemical composition and hardness to WFA. Due to its uniform tiny microcrystalline structure, high toughness and tiny broken performance, CA can be widely used for grinding of difficult-to-process material like tool steel, toughness stainless steel, heat-resistant alloy steel, etc.

2.Features of abrasive tools made by CA:

①Sharp grains, strong cutting capacity, and high grinding efficiency. It can be used for large deep cut, roughing feed, heavy duty and high efficiency grinding. According to the experiment, single process feeding can reach 0.3mm or more, metal removal rate is more than twice of common corundum grinding wheels.

②Good toughness, small abrasion, and grinding wheels have good shape retention. For precision grinding and form grinding, higher dimensional accuracy and size shape consistency can be easily got.

③High durability and long service life. It can reach 5 to10 times of common corundum grinding wheels. Low replacement frequency can reduce auxiliary process time and downtime, which makes it conducive to the use of numerical control automatic machine, realizing automatic production.

④Good self-sharpening performance, not clogging. It can keep steady grinding performance, reduce correction (only about 1/3 of the common corundum grinding wheels) and improve production efficiency.

⑤In grinding performance, CA grinding wheels are far better than common corundum grinding wheels. For price, CA is much lower than CBN and diamond abrasives, while its hardness is similar to common fused alumina.So, it does not need special grinding equipments and correcting devices. It has no special requirements for grinding equipments and no dressing difficulties compared to CBN and diamond abrasives. It also has no special requirements for grinding fluid. So, it is easy to spread the use of it.



1.Chemical Composition(typical value):





2.Physical Index:


Ball Grinding Toughness

Crystal Size