Application of garnet powder in ultra-fine grinding and polishing of optical glass
Garnet powder has the following core application characteristics and process advantages in the field of ultra-fine grinding and polishing of optical glass:
1. Core material characteristics
High hardness and self-sharpening
Its hardness can reach 7.5-8.5 Mohs, which can effectively cut tiny protrusions on the glass surface, while maintaining sharp edges and corners during the grinding process, significantly improving the surface flatness;
Chemical inertness and thermal stability
It is not easy to react chemically under high temperature or acid-base environment, avoiding polishing medium residues from contaminating the optical glass substrate;
Precise particle size control
The produced sizes #240-#3000 can meet the full process requirements from rough grinding to mirror polishing.
2. Typical application scenarios
Polishing of optical lens group
It is used to eliminate submicron scratches on the surface of the lens and achieve nanometer-level roughness. It is especially suitable for high-precision optical components such as camera lenses and microscope objective lenses;
Fiber optic end face processing
Using resin abrasives, ultra-precision grinding of fiber connection end faces can be completed to reduce signal transmission loss;
Pretreatment of semiconductor substrates
It is used in the pre-polishing process of materials such as silicon wafers and quartz glass to provide atomic-level flat surfaces for subsequent coating/etching.
3. Process adaptability advantages
Composite abrasive development
It can replace 20%-30% brown corundum as a resin abrasive filler, taking into account cutting efficiency and surface finish requirements;
Simplified wastewater treatment
Compared with cerium oxide polishing powder, garnet micropowder is easier to recycle grinding waste liquid through physical sedimentation, which meets green manufacturing standards;
Cost-benefit balance
In mid-to-high-end polishing scenarios, its comprehensive cost-effectiveness is better than that of pure diamond micropowder solutions, and it is particularly suitable for mass production environments.
Note: The current mainstream process has achieved deep adaptation with automated polishing equipment, and can achieve industrial-grade stable output with a polishing accuracy of ≤0.2μm through parameter control.
