钴珠
Cobalt beads
以上为机器翻译结果，长、整句建议使用 人工翻译 。
研究了柠檬酸盐溶胶-凝胶方法制备空心微珠-钡、锶、钴镍钡铁氧体复合粉体的微观形貌，采用化学添加剂改善铁氧体的包覆性能。
Ferrite-encapsulated cenosphere powders were prepared by citrate sol-gel method. The additive was used to improve the performance of ferrite coating.
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