Lanthana cerium oxyfluoride rare earth polishing liquid and preparation method thereof
A polishing technology of lanthanum cerium oxyfluoride and rare earth, which is applied in the field of rare earth polishing liquid and its preparation, can solve the problems of low polishing precision and large particle size of polishing powder, and achieve fast polishing rate, small rare earth particle size and less scratches Effect
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Example Embodiment
[0041] Example 1
[0042] (1) Precipitation: Heat 1L of lanthanum cerium nitrate aqueous solution with a concentration of 100 g / L to 80°C, where the cerium in the solution accounts for 60wt% of the total mass of lanthanum and cerium, and add 60 g / L under stirring conditions Precipitating ammonium bicarbonate until the pH of the mixed solution is 6.5, and then washing with deionized water 3 times after filtration to obtain a mixture of lanthanum and cerium carbonate;
[0043] (2) Fluorination: adding hydrofluoric acid to the obtained lanthanum-cerium carbonate mixture to perform fluorination reaction, wherein the amount of hydrofluoric acid added is 5wt% of the total weight of lanthanum-cerium carbonate;
[0044] (3) Roasting: The fluorinated lanthanum cerium carbonate is centrifuged and dehydrated, and the filter cake is dried at 100°C for 15 hours. After drying, the powder is roasted at 950°C for 5 hours to obtain lanthanum oxyfluoride cerium oxide polishing powder ( Where the fluo...
Example Embodiment
[0047] Example 2
[0048] (1) Precipitation: Heat 1L of lanthanum cerium nitrate aqueous solution with a concentration of 150 g / L to 80°C, where the cerium in the solution accounts for 70wt% of the total mass of lanthanum and cerium, and add 60 g / L under stirring conditions Precipitate the mixed solution of ammonium bicarbonate and sodium carbonate (the mass ratio of ammonium bicarbonate and sodium carbonate is 1:1) until the pH of the mixed solution is 8.5, and then wash with deionized water 3 times after filtration to obtain a lanthanum-cerium carbonate mixture;
[0049] (2) Fluorination: adding hydrofluoric acid to the resulting lanthanum-cerium carbonate mixture to perform a fluorination reaction, wherein the amount of hydrofluoric acid added is 7wt% of the total weight of the lanthanum-cerium carbonate;
[0050] (3) Roasting: the fluorinated lanthanum cerium carbonate is centrifuged and dehydrated, and the filter cake is dried at 120°C for 12 hours. After drying, the powder is r...
Example Embodiment
[0053] Example 3
[0054] (1) Precipitation: Heat 1L of lanthanum cerium chloride aqueous solution with a concentration of 200 g / L to 90°C, where the cerium in the solution accounts for 80wt% of the total mass of lanthanum and cerium, and the concentration is 60 g / L under stirring conditions Precipitate the sodium carbonate of the mixture until the pH value of the mixed solution is 10, and wash with deionized water 3 times after filtration to obtain a mixture of lanthanum and cerium carbonate;
[0055] (2) Fluorination: adding hydrofluoric acid to the obtained lanthanum cerium carbonate precipitate for fluorination reaction, wherein the amount of hydrofluoric acid added is 7wt% of the total weight of lanthanum cerium carbonate;
[0056] (3) Roasting: The fluorinated lanthanum cerium carbonate is centrifuged and dehydrated to obtain a filter cake and dried at 120°C for 12 hours. After drying, the powder is roasted at 900°C for 8 hours to obtain lanthanum oxyfluoride cerium oxide polis...
PUM
Abstract
Description
Claims
Application Information
- R&D Engineer
- R&D Manager
- IP Professional
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap