结晶度
磁铁矿
超细粒子
降水
化学工程
色散(光学)
水溶液
材料科学
粒径
共沉淀
粒子(生态学)
矿物学
化学
冶金
纳米技术
复合材料
地质学
有机化学
气象学
物理
光学
工程类
海洋学
作者
Jiwon Lee,Tetsuhiko Isobe,Mamoru Senna
标识
DOI:10.1006/jcis.1996.0062
摘要
Ultrafine magnetite particles of average diameter 4–7 nm were prepared by precipitation in a poly(vinylalcohol) (PVA) aqueous solution. Crystallinity of the particles decreased with increasing PVA concentration, while the morphology and particle sizes remained almost unchanged. The dispersion of the magnetite particles prepared at 1 wt% PVA was particularly stable. The saturation magnetization of the particles was above 50 emu/g, in spite of their small size and low crystallinity compared with conventionally prepared fine magnetite particles.
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