Fluorine-free rare earth polishing powder composition and preparation method thereof
A technology of rare earth polishing powder and composition, which is applied to polishing compositions containing abrasives, chemical instruments and methods, and other chemical processes, which can solve the problems of increased environmental protection costs, large consumption, and short life, and achieve improved Effects of quality, improved performance, and reduced price fluctuations
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Embodiment 1
[0033] Add 100L of cerium chloride feed solution and 5L of samarium chloride feed solution into a 500L reaction kettle, stir evenly, then add ammonium bicarbonate for co-precipitation. The precipitate was centrifuged and washed with water to obtain 22.34 kg of samarium cerium carbonate (TREO: 49.56%, where Sm 2 o 3 / TREO: 5.02%, CeO 2 / TREO: 94.98%); the above product was dried in a roller kiln at 300°C for 1h, and burned at 950°C for 5h; then gas powdered and classified to obtain a particle size of D 50 : 0.82 μm, D 100 : 10.51 kg of polishing powder with a diameter of 4.02 μm; the polishing powder sample was obtained after mixing auxiliary agent LP-1, marked as SC-1; the polishing comparison experiment was carried out on the RL-13B polishing machine, and the results are shown in Table 1.
Embodiment 2
[0035] Add 100L of cerium chloride feed solution and 2L of samarium chloride feed solution into a 500L reactor, stir evenly, then add oxalic acid for co-precipitation. The precipitate was filtered by suction and washed with water to obtain 21.65 kg of samarium cerium oxalate (TREO: 40.56%, wherein Sm 2 o 3 / TREO: 2.11%, CeO 2 / TREO: 97.89%); the above product was dried in a roller kiln at 250°C for 2h, and burned at 980°C for 4h; then gas powdered and classified to obtain a particle size of D 50 : 1.16 μm, D 100 : 8.23 kg of polishing powder with a diameter of 4.02 μm; the polishing powder sample was obtained after mixing auxiliary agent LP-1, marked as SC-2; the polishing comparison experiment was carried out on the RL-13B polishing machine, and the results are shown in Table 1.
Embodiment 3
[0037] Add 100L of cerium chloride feed solution and 10L of samarium chloride feed solution into a 500L reactor, stir evenly, then add ammonia water for co-precipitation. The precipitate was suction filtered and washed with water to obtain 40.56 kg of samarium cerium hydroxide (TREO: 27.53%, where Sm 2 o 3 / TREO: 9.91%, CeO 2 / TREO: 90.09%); the above product was dried in a roller kiln at 200°C for 3 hours, burned at 920°C for 6 hours, dried and fired; then gas powdered and classified to obtain a particle size of D 50 : 0.75 μm, D 100 : 9.87 kg of polishing powder with a diameter of 4.89 μm; the polishing powder sample was obtained after mixing auxiliary agent LP-1, marked as SC-3; the polishing comparison experiment was carried out on the RL-13B polishing machine, and the results are shown in Table 1.
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