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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >The study of process production of polishing powder based on cerium dioxide
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The study of process production of polishing powder based on cerium dioxide

机译：二氧化铈抛光粉的工艺生产研究

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Finely divided cerium dioxide powder is anexcellent polishing agent for optical glass under intensiveprocessing conditions. Cerium dioxide powder was producedfrom a mixture of rare earth carbonates by conversion to oxides,reacting with acid to separate a sediment of CeO(OH)_2 fromsolution containing the trivalent rare earth ions, washing thesediment, and drying and annealing it to produce finely dividedCeO_2. Physical and chemical investigations of each stage ofthe processing were performed. A relation was establishedbetween the properties of CeO(OH)2 (such as degree of finenessand crystal structure) and the properties of the REE oxides thatwere used. It was shown that very fine REE oxides generate fineCeO(OH)_2. It was also shown that to obtain CeO_2 powderwith high specific surface area and perfect crystal structure, theCeO(OH)_2 must be annealed in two steps: (1) dehydration ofintermediate CeO _(1.5)(OH) to produce very fine powder, and(2) dehydration at 800-1050 deg C.
机译：细碎的二氧化铈粉末是在强化加工条件下用于光学玻璃的出色抛光剂。由稀土碳酸盐的混合物转化成氧化物，然后与酸反应，从含有三价稀土离子的溶液中分离出CeO（OH）_2沉淀物，将其洗涤，干燥和退火以生成细分的CeO_2，从而生成二氧化铈粉末。对加工的每个阶段进行了物理和化学研究。 CeO（OH）2的性质（如细度和晶体结构）与所使用的REE氧化物的性质之间建立了关系。结果表明，非常细的稀土氧化物会生成细的CeO（OH）_2。还表明，要获得具有高比表面积和完美晶体结构的CeO_2粉末，必须分两个步骤对CeO（OH）_2进行退火：（1）脱水中间CeO _（1.5）（OH）以生产非常细的粉末，以及（2）在800-1050℃下脱水

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