초록 ▼

This invention is a method for producing a cerium-based abrasive which includes: a step of grinding raw material for the cerium-based abrasive; a step of roasting the ground raw material; and a step of subjecting the roasted raw material to wet processing, the method being characterized in that it f

This invention is a method for producing a cerium-based abrasive which includes: a step of grinding raw material for the cerium-based abrasive; a step of roasting the ground raw material; and a step of subjecting the roasted raw material to wet processing, the method being characterized in that it further includes a lower-temperature re-roasting step of heating the wet-processed raw material at 200 to 700° C. In the invention disclosed in this application, an abrasive with particularly preferable properties can be produced by fully drying the wet-processed raw material in a drying step, and subsequently subjecting the dried raw material to the lower-temperature re-roasting step.

대표청구항 ▼

1. A method for producing a cerium-based abrasive, comprising: a step of grinding raw material for a cerium-based abrasive; a step of roasting the ground raw material; and a step of subjecting the roasted raw material to wet processing, characterized in that it further comprises a lower-temperature

1. A method for producing a cerium-based abrasive, comprising: a step of grinding raw material for a cerium-based abrasive; a step of roasting the ground raw material; and a step of subjecting the roasted raw material to wet processing, characterized in that it further comprises a lower-temperature re-roasting step of heating the wet-processed raw material at 200 to 700° C.2. The method for producing the cerium-based abrasive according to claim 1, wherein the roasted raw material is subjected to wet grinding and/or wet classification as the wet processing.3. The method for producing the cerium-based abrasive according to claim 1, wherein the heating duration in the lower-temperature re-roasting step is set at 0.5 to 60 hours.4. The method for producing the cerium-based abrasive according to claim 1, wherein the wet-processed raw material is directly re-roasted at the lower temperature.5. The method for producing the cerium-based abrasive according to claim 4, wherein the lower-temperature re-roasting step is conducted by spraying and heating the abrasive slurry formed through the wet processing.6. The method for producing the cerium-based abrasive according to claim 1, further comprising a drying step between the wet processing step and the lower-temperature re-roasting step.7. The method for producing the cerium-based abrasive according to claim 6, wherein the drying step is conducted by spraying and heating the abrasive slurry formed through the wet processing.8. The method for producing the cerium-based abrasive according to claim 7, wherein the atmospheric temperature for drying the droplets formed by spraying the abrasive slurry is 120° C. to 300° C.9. The method for producing the cerium-based abrasive according to claim 6, wherein the drying step is conducted by heating the abrasive slurry while applying vibration to said abrasive slurry.10. The method for producing the cerium-based abrasive according to claim 9, wherein the atmospheric temperature for drying the abrasive slurry is 30° C. to 200° C.11. The method for producing the cerium-based abrasive according to claim 6, wherein the abrasive slurry contain an organic solvent.12. The method for producing the cerium-based abrasive according to claim 11, wherein the content of the organic solvent in the abrasive slurry is 0.1% by weight to 30% by weight prior to the drying operation.13. The cerium-based abrasive produced by the method according to claim 1, wherein the cerium oxide content (by weight ratio to the total rare earth oxide content (hereinafter referred to as TREO) is 50 to 95%, the lanthanum oxide content (by weight ratio to TREO) is 5 to 50%, and the fluorine content (by weight ratio to the entire abrasive) is 5% or less.