Abrasive particles including coating, abrasive articles including abrasive particles, and methods of forming

By forming a coating containing silica, lithium and potassium on the abrasive particles, the problem of poor performance of existing abrasive products under wet grinding conditions is solved, achieving more efficient grinding performance and longer service life.

CN120035646APending Publication Date: 2025-05-23SAINT GOBAIN ABRASIVES INC +1
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Patent Information

Application Number
CN202380067419.6
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Priority Date
2023-06-21
Filing Date
2023-09-22
Publication Date
2025-05-23

AI Technical Summary

Technical Problem

Existing abrasive products perform poorly under wet grinding conditions, resulting in continued improvement demand in the industry.

Method used

Abrasive particles are formed using a coating covering the core. The coating contains a specific proportion of components such as silica, lithium and potassium. The average thickness and morphology of the coating are improved through drying treatment and the moisture resistance of the abrasive particles is enhanced.

Benefits of technology

Improves the abrasive performance of abrasive products under wet conditions, extends service life, and maintains good performance after aging.

✦ Generated by Eureka AI based on patent content.

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Abstract

The following relates to abrasive particles having a body comprising a core and a coating covering at least a portion of the core. The coating may include an amount of lithium. In one embodiment, the coating may also include silicon, oxygen, or a combination thereof.
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Claims

1. A kind of abrasive particles, include: A subject, the subject comprising: core; and A coating covering at least a portion of the core, wherein the coating comprises a lithium content of at least 0.02 wt % and no greater than 20 wt % based on the total weight of the coating.

2. A kind of abrasive particles, include: A subject, the subject comprising: core; and A coating covering at least a portion of the core, wherein the coating comprises lithium and silicon, wherein the weight content of silicon is greater than the weight content of lithium.

3. Abrasive grain according to claim 1 or 2, wherein the coating comprises a lithium content of at least 0.05 wt. %, at least 0.07 wt. %, at least 0.10 wt. % or at least 0.15 wt. % based on the total weight of the coating.

4. Abrasive grain according to claim 1 or 2, wherein the coating comprises a silicon content of at least 21 wt. %, at least 25 wt. %, at least 30 wt. %, at least 35 wt. % or at least 38 wt. %, based on the total weight of the coating.

5. The abrasive grain of claim 1 or 2, wherein the coating comprises a lithium / silicon percentage in the range of at least 0.01% to no more than 250%, a sodium content of no more than 12 wt % based on the total weight of the coating, or any combination thereof.

6. The abrasive grain of claim 1 or 2, wherein the coating comprises an amorphous phase comprising lithium, silicon, or a combination thereof.

7. Abrasive particles according to claim 1 or 2, wherein the coating comprises oxygen.

8. Abrasive particles according to claim 1 or 2, comprising a particle size greater than 0.05 μm. 2 / g and less than 2.2m 2 / g specific surface area.

9. The abrasive grain according to claim 1 or 2, wherein the coating comprises a lithium-containing material comprising Si, O, or a combination thereof.

10. The abrasive grain of claim 1 or 2, wherein the coating comprises nanoparticles, nanopores, or a combination thereof.

11. The abrasive grain of claim 10, wherein the nanoparticles comprise silicon, oxygen, or a combination thereof.

12. The abrasive particle of claim 1 or 2, wherein the core comprises a material comprising an oxide, a carbide, a nitride, a boride, an oxycarbide, an oxynitride, a silicate, or any combination thereof.

13. The abrasive particle of claim 1 or 2, wherein the core comprises a ceramic material comprising a magnetoplumbite phase. 14 . An abrasive product comprising a main body, the main body comprising a bonding material and abrasive grains contained in the bonding material, wherein the abrasive grains comprise the abrasive grains according to claim 1 or 2.

15. An abrasive product comprising a bonding material comprising an organic material and abrasive grains contained in the bonding material, wherein at least 10% of the volume content of the abrasive grains comprises the abrasive grains according to claim 1 or 2.

Citation Information

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